In these days of affordable, and largely high-quality plug-in instruments, it’s easy to forget that many years ago, in the intrepid
days of hardware behemoths, things were very different. For example, in the late 1970s the highly desirable Minimoog would set
you back a whopping £1500 and only play one note at a time. And even an outlying Minimoog competitor would leave you needing
a skin-graft, such was the size of the hole burnt in your pocket.
During this period, and inspite of the fact that every manufacturer’s mission was ‘affordable monophonic synthesis for all’, it was
unclear how that could be achieved due to the high component costs.
The big breakthrough came in the UK in 1978 when the first truly affordable monophonic synthesizer was released to an eager
but unsuspecting world. Conceived by Chris Huggett and Adrian Wagner, the EDP Wasp, at a price of £199, heralded a new era
of synthesis and was undoubtedly responsible for introducing legions of young adults to electronic sound exploration. Of course,
in order to bring a synth in at approximately half the price of any competitor certain compromises had to be made, the most
noticeable one being a ‘toy-like’ touch-sensitive keyboard. In terms of sound, the Wasp was far from a toy and featured multi-mode
filters, resonance, portamento and three stage envelope generators. Needless to say, it was a huge success and reportedly provided
Dave Stewart and Thomas Dolby with their first synths.
After a succession of add-on devices, revised models and increased competition from US and Japanese markets, the EDP collaborators
went their separate ways, but in 1983 Chris Huggett resurfaced with a new beast. The radical looking OSCar, resplendent with
chunky rubber end-cheeks and front panel dividers, continued the theme started by the Wasp with some notable exceptions.
Primarily, it was certainly not a synth for beginners and it also had a real keyboard - the OSCar was a monster of a synth with a
sound to match.
Although often lumped-in with rest of the analog contingent, in truth, the only thing analog about the OSCar (and the Wasp)
was the sublime filter. Almost every other aspect of it was digital. In terms of features it was positively jam-packed, and included
two oscillators containing sine, saw, square, and variable pulse width waveforms. portamento and glissando, a comprehensive
arpeggiator, on-board sequencing and a cornucopia of filtering options. The OSCar even boasted a unique additive synthesis
feature which allowed users to construct and save their own waveforms using 24 fundamental harmonics. It even had patch
storage too! All these features, plus the unique filter separation control and amazing filter overdrive had converged to create a
truly magnificent sounding instrument.
So why did the OSCar not become one of the greatest selling synths of all-time and why are they so rare today?
Firstly, in 1983 the OSCar cost £699, only marginally cheaper than Roland’s polyphonic Juno 60, and at a time when affordable
polyphonic synthesis had succeeded affordable monophonic synthesis as the holy grail, it’s easy to see why it could be passed over
in favor of a chord playing rival.
Secondly, 1983 was the year of MIDI, which was notably absent on the first production run of OSCars, although it was quickly added
after the first few hundred had been shipped.
And thirdly, the reason for its rarity is simple - there were only around 2000 OSCars produced. However, those fortunate enough
to have owned one have always remained convinced that this was one of the world’s great synths and their passion has helped
elevate this instrument into the realms of synth folklore.
In terms of sound potential, it’s difficult to categorize the OSCar. On one hand, by utilizing the additive synthesis functions, it was
possible for it to sound very digital and harsh. On the other hand, by using the PWM in conjunction with the overdriven filter,
screaming leads and corpulent bass sounds were without doubt the order of the day for many.
With regards to its overdriven power, sound designer and programmer Paul Wiffen, who had been a key part of the EDP and OSCar
team, recalls that many synth players like Billy Currie and Jan Hammer were putting their synths through distortion pedals to
create their own unique sounds, and during development he suggested to Chris Huggett that a similar effect could be achieved
by applying an internal overdrive to the filter. Using this feature he came up with an emulation of the classic Ultravox lead which
eventually became the OSCar default sound. This turned out to be a clever marketing move too, because when he demonstrated the
OSCar to Ultravox some months later, the band each bought one to take over tour duties from their now aging ARP Odysseys.
3
During its life, the OSCar has appeared on countless tracks, acting as the main instrument on Ultravox’s Love’s Great Adventure,
as well as performing bass duties on Stevie Wonder’s track, Skeletons, (taken from the ‘Characters’ album). In fact, the entire world
became unwittingly aware of the OSCar sound via its bass on Band Aid’s ‘Do they Know it’s Christmas’ in 1985. Returning to slightly
more hip territory though, Mark Moore of S-Express used it for the bassline on ‘The Theme From S-Express’, and it’s also appeared
on a host of Underworld tracks from ‘Rez’ to ‘Rowla’.
GMEDIA Music has had a long term love affair with the OSCar too. Some time ago Dave Spiers was asked by Underworld to find
a back-up for their instrument. This he did but was so taken by its character that he was unwilling to give it up – having to find
another for the band!
“After hearing it, my wife insisted that I should keep it, despite the fact that she’s usually totally disinterested in synths. After
that, the OSCar quickly became part of any programming project I worked on, and in early 2002 after I’d voiced my concern as
to how rare and expensive they are becoming to Jon Hodgson, he offered to begin the detailed task of turning it into a virtual
instrument.”
“Of all the monosynths the OSCar has always been very interesting to me, for two main reasons,” says Jon. “The first is that it’s
different - the double filter with separation, the different waveforms, the additive synthesis. It does things in its own slightly unique
way and I like that in an instrument. The second is that it’s the only one of what you might call the ‘old school’ of monosynths
that I can actually remember seeing adverts in magazines for. I guess it must have been in it’s last days when I first started getting
interested in synths and music, and it certainly was eye catching!”
Over the ensuing two years the impOSCar was developed by Jon regardless of cost or effort. Capturing the sonic essence and tonal
characteristics of the original instrument was absolutely paramount.
Of course, in this day and age it would have been foolhardy not to have incorporated certain new features, such as the ability to
sync the tempo of both the arpeggiator and LFO to the sequencer host, as well as adding polyphonic capability, velocity sensitivity
and an additional effects section.
Regarding many of the enhancements, Jon comments: “Many of these, in particular the new filter modes, were achievable on the
original OSCar with a scalpel, some wire and a soldering iron, so I don’t think it goes against the spirit of the original. In fact I hope
people will find that, if anything, many of the enhancements will add to the fundamental character of the original instrument. The
OSCar could transmit polyphonically from the keyboard and as a result many musicians wondered what a polyphonic OSCar would
sound like - now’s their chance to find out.”
So that’s the story behind the impOSCar. But given that the sounds and features of this eminent beast are still so highly soughtafter today, what happened to the team behind the original instrument who provided the inspiration for this plug-in? Well, we’re
glad to say that they have enjoyed (or perhaps endured) long careers within the Musical Instrument Industry. Paul Wiffen is now
an Apple consultant in the UK, as well as being a highly respected industry journalist, while Chris Huggett went on to develop
operating systems for Akai Samplers and, more recently, heads the design team for Novation.
An Appeal - Please support developers, not pirates.
If you’re reading this from the printed manual, the chances are you paid for this software and as such we’d like to say a heartfelt
thanks. The money that we receive from sales of the impOSCar will be channelled back into further development projects and used
to create other interesting and valid musical products. However, if you did not pay for this please take the time to understand the
implications of piracy for small companies such as ourselves. This product took almost two years to produce and has involved the
small development team in many personal and financial sacrifices - Nonetheless we have tried to keep the cost of the instrument
at a realistic level and make the copy protection as unintrusive as possible. As such we would kindly ask you not to support the
pirates and not to post the impOSCar on any newsgroup or P2P group. Many thanks.
OSCar web resources.
www.airburst.co.uk/oscar/intro.htm
www.sospubs.co.uk/sos/sep99/articles/oscar.htm
www.sonicstate.com/synth/osc_oscar.cfm
OSCar book resources.
A-Z of Analogue Synthesisers (Part Two. N - Z) - Pete Forrest
Vintage Synthesisers - Mark Vail.
4
2
Installing the impOSCar
Included on the Master CD are multiple versions of the impOSCar. The impOSCar installer allows you to install any or all versions
via a single installer, one for Mac and one for PC.
PC -
Insert the impOSCar Master CD into your CD-ROM drive. From the setup window select the “Install” option and follow the
onscreen instructions carefully, entering your unique User Name and Registration codes EXACTLY as you find them printed within
this Getting Started guide.
During installation, 14 sound banks—each containing 36 presets—will be installed to your desktop; these can later be moved to a
location of your choice.
Mac -
Insert the impOSCar Master CD into your CD-ROM
drive. Double-click on the GForce impOSCar disc icon to
open the disc. Double-click on the impOSCar.dmg file and
then run the impOSCar Installer, following the onscreen
instructions carefully and entering your unique User Name
and Registration codes EXACTLY as you find them printed
within this Getting Started guide. During installation, be
sure to click on the Next button until the installation routine
is complete.
During installation, 14 sound banks—each containing 36
presets—will be installed to your desktop; these can later be
moved to a location of your choice.
Special note about .fxb sound files:
During installation, the impOSCar sounds are installed to
your desktop in a folder called “impOSCar.” You can load the .fxb’s by dragging and dropping one of the files to the impOSCar user
interface.
Mac installer shown
Registration
3
Please take the time to register your impOSCar on-line at www.gmediamusic.com/registration/
Registration is required to receive free technical support.
4
Loading Sounds
Cubase
ImpOSCar sounds are loaded and saved as Banks. To load a Bank, simply click on File>Load Bank, navigate to the impOSCar folder
and select the desired Bank. Once a Bank has loaded, you can use the normal Cubase Patch Management system to scroll through
each sound.
Importing OSCar sounds via sysex
Although we have included the original OSCar presets as an impOSCar Bank, it is also possible to import original OSCar sounds
via sysex or tape. This is done via a standalone program which is freely available to Registered users from the support area of the
GMEDIA Music web site.
5
Oscillator Controls
• OSC1 Waveform Knob
Because the Oscillators on the OSCar were digital they were referred to
as OSC1 and 2 (as opposed to VCO 1 and 2). OSC1 contains the following
waveforms: Triangle, Sawtooth, Square, Variable Width Pulse, Pulse Width
Modulation, Full Organ, Harpsichord, Strong Lead, Double Pulse, Gritty,
UserWave1 and UserWave2. The waveform selected is displayed in the blue
screens above the Waveform Knobs.
Note: When selecting either UserWave1 or UserWave2, for either OSC1 or
OSC2, the waveform used will be that created and selected from within the
USER WAVES section.
• OSC2 Waveform Knob
Features exactly the same waveforms as OSC1 but, whereas with OSC1 you
can simply select a waveform shape, OSC2 offers a few more options listed
as follows:
• OSC2 Oct Shift Knob (OCT SHIFT)
This allows you to change the octave position of OSC2 across a six octave
range.
• OSC2 Transpose Knob
Allows transposition of OSC2 by either + or - seven semitones.
• OSC2 Detune Knob
This enables you to detune OSC2 against OSC1 in order to create ‘thicker’ or ‘chorus’ type sounds.
• Pulse Width Knob (PW)
Provided either one, or both, Oscillators are using Pulse Width or Pulse Width Modulation waveforms, this knob applies an
independent LFO to the waveform(s) in order to modulate them. Turned to the left, the PW Knob will have a minimal effect and will
create a more ‘hollow’ sound. As this knob is turned further to the right it will create a ‘thicker’ sound as a result of the increase
in modulation.
• Octave Transpose LEDs
Clicking on the red lights will transpose both Oscillators globally. Use this in conjunction with the OSC2 transpose knobs to create
relative transpositions.
Wheels Section
• Bend Knob
This allows you to determine the effect the pitchbend wheel – on either the impOSCar interface or your master
keyboard – has on the impOSCar sound. You can select any amount between 0 (off) and 24 semitones (two
octaves).
• Mod – Pitch Amount Knob
Here it’s possible to choose the amount of pitch modulation introduced by the modulation wheel. Both + and
- pitch modulation settings are available, with a zero setting at 12 O’clock. The speed of this modulation is
governed by the LFO rate.
• Mod – Filter Amount Knob
Similar to the aforementioned Pitch Mod function, only this time the modulation wheel will affect the Filter
Amount. Again the speed of Filter Modulation is determined by the LFO rate.
6
Glide Controls
• Glide Type Knob
The impOSCar contains an exceptionally comprehensive set of Glide options. The six modes are as follows:
Normal: A simple portamento where the time between each note is governed by the Glide Time Knob.
1.
In the first three ‘unfixed’ modes the Glide Time is the time taken to slide one octave, which means that
the larger the interval the longer the glide time.
Auto: The same as Normal mode except that in monophonic mode glide is activated only between notes
2.
that are held.
Gliss: The Glissando mode is similar to Normal mode but instead of a smooth transition between each
3.
note you actually hear the semitone steps.
Normal - Fixed: As per Normal mode with the exception that in the Normal Fixed mode the glide time
4.
is the time taken between any two notes, no matter how large the interval.
5. Auto - Fixed: As per Auto mode whereby portamento is only triggered by legato notes, except that the glide time is the
time between any two notes, no matter how large the interval.
6. Gliss - Fixed: As per the previous Glissando mode except that in this case the glide time is the time between any two notes,
no matter how large the interval.
Mix Controls
• Osc Balance Knob
Determines the relative balance between OSC1 and OSC2.
• Noise Balance Knob
Alters the balance between the combined tones of OSC1 and OSC2 and a ‘white-noise’ generator.
LFO Controls
• LFO Waveform Knob
While the original instrument had six LFO waveforms, this amount
has doubled on the impOSCar. The original OSCar waveforms
were:
Triangle, Sawtooth, Square, Filter Env, Random and Kbd. The
latter was replaced by Guitar (a positive-only wave, so vibrato
will happen only above the key pitch).
Additional new waveforms include:
Triangle 3 Step, Sawtooth 4 Step, Triangle 5 Step, Sawtooth
8 Step, Pattern1 and Pattern 2. Selected LFO waveforms are
displayed in the blue screen above the Waveform Knob.
• LFO Filter Amount Knob
Controls the depth of the LFO and, in turn, the effect the LFO has on
the filter. This parameter has both negative and positive values and
the resultant effect is directly related to both the LFO Waveform
shape and the LFO rate.
• LFO Rate Knob
This governs the speed of the LFO. There are four LFO modes which are dependent on the position of the LFO Sync Knob. For
example, with the Sync Knob set to ‘Free’ the speed is given in Hertz, but if the Sync Knob is set to ‘MIDI’ the value is displayed in
Cycles Per Bar. See LFO Sync Knob (below) for more details on sync modes.
7
• LFO Intro Knob
This knob allows you to delay the start of the LFO after playing a note. The LFO delay or ‘Intro’ time, is given in seconds.
• LFO Pitch Modulation Knob
This knob determines the amount of pitch modulation or vibrato applied to a sound. As with the LFO Filter Amount Knob, this is
directly related to the LFO Waveform shape and the LFO Rate. This parameter also has both positive and negative values with values
of up to + or - seven semitones.
• Env2 - Pitch Knob
With this knob it’s possible to use the filter envelope (ENV2) to make changes to the pitch of your sound. Again, this has both
positive and negative values giving a range of up to + or - seven semitones.
• LFO Synchronization Knob
Provides four sync modes under which the LFO can operate:
1. Free: Free-run mode providing no sync between polyphonic voices. Great for swirling chords.
2. Lock: Selecting this locks all polyphonic voices in sync with each other.
Clock: Synchronizes the LFO to main tempo clock, which may itself by synchronized to MIDI in order to create LFO effects
3.
that match the Arpeggiator.
4. MIDI: Synchronized to MIDI, bypassing main clock.
Filter Controls
The OSCar’s filter was unique in that it consisted of two 12dB filters which could be combined in
series to create 24dB filtering. The filtering modes were LPF, BPF and HPF with a ‘no track’ option.
We have removed the ‘no track’ option as it possible to achieve the same using the KEYB TRACK
knob. However, the impOSCar has expanded on these original modes by adding several more that
were achievable on the original instrument with the careful use of a soldering iron.
• Filter Type Knob
Selects from the following nine filter options:
1. Low Pass 24dB: Where the two 12dB filters are combined in ‘series’ and allow the low
frequencies to pass through while filtering high frequencies.
2. Band Pass 24dB: Where the two 12dB filters are combined in ‘series’ and allow the
selected band of frequencies to pass through while filtering out anything outside that
range. Note: In this mode the two filters are arranged as one Lo Pass and one Hi Pass, not
2 Band Pass.
3. Hi Pass 24dB: Again where the two 12dB filters are combined in ‘series’ to allow the high frequencies to pass through while
filtering out low frequencies.
4. Low Pass 2 Pole: Where the two filters are arranged in ‘parallel’ and allow the low frequencies to pass through while
filtering high frequencies. In this mode when the Separation is set to zero it’s the same as a normal 12dB filter. However
when it’s set to anything other than zero you get two resonant peaks and cutoff points.
5. Band Pass 2 Pole: Where the two 12dB filters are combined in ‘parallel’ allowing the selected band of frequencies to pass
through while filtering out anything outside that range. Again, when the Separation is set to zero it’s the same as a single
12dB filter. However, when it’s set to anything other than zero, you get two resonant peaks and cutoff points
6. Hi Pass 2 Pole: Where the two 12dB filters are combined in ‘parallel’ allowing the high frequencies to pass through while
filtering out low frequencies. Again, when the Separation is set to zero it’s the same as a single 12dB filter. However when
it’s set to anything other than zero you get two resonant peaks and cutoff points
7. Lo Pass//Band Pass: Where the Lo Pass and Band Pass filters are arranged in ‘parallel’. In this mode with zero or higher
Separation you get a ‘notch’ or ‘band reject’ effect.
8. Lo Pass//Hi Pass: Similar to the above but where the Lo Pass and Hi Pass filters are arranged in ‘parallel’
9. Band Pass//Hi Pass: Again, similar to the previous two filter modes only this time the Band Pass and Hi Pass filters are
arranged in ‘parallel’.
8
• Q Knob or Resonance
This boosts the harmonics around the cut-off frequency.
• Separation Knob
Unique to the OSCar and impOSCar. This takes the two 12dB filters and allows independent control of their cutoff frequencies.
When used with either the four- or two-pole filter modes, it’s possible to separate the filters by up to 24 semitones.
Note: In the first six filter modes zero separation takes place when the knob is turned fully to the left. In the last three multi-modes
zero separation takes place when the knob is at 12 O’clock.
• Amount Knob
Determines the filter amount applied to the filter envelope (ENV2). This also works in positive and negative modes.
Env 1 – Amplitude ADSR controls
• Attack Knob
Used to alter the attack time of the amplitude envelope generator
between 0.001 and 15 Secs
• Decay Knob
Used to alter the decay time of the amplitude envelope generator between 0.001 and 30 Secs
• Sustain Knob
Used to alter the sustain level of the amplitude envelope generator between -? (minus infinity) and 0dB
• Release Knob
Used to alter the release time of the amplitude envelope generator between 0.001 and 60 seconds.
Env2 – Filter ADSR controls
• Attack Knob
Used to alter the attack time of the filter envelope generator between
0.001 and 30 Secs.
• Decay Knob
Used to alter the decay time of the filter envelope generator between
0.001 and 30 Secs.
• Sustain Knob
Used to alter the sustain level of the filter envelope generator between 0% and 100%.
• Release Knob
Used to alter the release time of the filter envelope generator between 0.001 and 60 seconds.
• Delay Knob
This applies a delay of up to two seconds to the start of the filter envelope generator and is useful for creating those long, evolving
sounds.
Triggering Controls
• Keyboard Triggering Knob
The impOSCar has five triggering modes as follows:
Single: Using this mode the envelopes are only retriggered once
1.
their cycle is complete. When playing legato lines, the first note
triggers the envelope contour and all successive notes are heard
at sustain level.
Multi: Here, the envelopes are retriggered each time a note is played without waiting for the envelope cycle to finish first.
2.
Unlike Single trigger, when playing legato lines, all notes will retrigger the envelope contour.
9
3. Rpt 1: Used in conjunction with the Tempo Knob, Rpt1 activates the retriggering of the Amplitude Envelope (Env1).
4. Rpt 2: Similar to the Rpt1 function, Rpt2 activates the retriggering of the Filter Envelope (Env2) in accordance with the
selected tempo.
5. Rpt 1+2: This activates the retriggering of both the Amplitude and Filter Envelope in accordance with the Tempo Knob.
• Tempo Knob
Controls the tempo of either the Arpeggiator or the retriggering of the envelopes as described previously. The tempo of the
impOSCar can be clocked internally or synchronized to an external source (see arpeggio sync page 16). If set to Internal Clock the
Tempo Rate is shown as BPM. If set to External Clock the Tempo Rate is shown as Beats Per Bar.
• Gate Time Knob
When using any of the aforementioned Rpt triggering options this knob can be used to alter the Gate Time of either one or both
envelopes. The default Gate Time setting is 50% and moving the knob to the right extends the Gate Time whereas moving the knob
to the left shortens the Gate Time.
For optimum Gate Time control ensure the Release Times of each envelope are not too long.
• Function Knob
A radical departure from the original instrument, here the Function Knob selects from six polyphony modes:
1. Mono: Selects monophonic mode, ideal for lead or bass lines.
Duo: A maximum of two notes can be played simultaneously with either note having the ability to play one or both
2.
oscillators depending on whether one or two notes are played (see Using Duo Mode page 20)
3. Poly4: A four voice polyphonic mode.
4. Poly8: An eight voice polyphonic mode.
5. Poly12: A twelve voice polyphonic mode.
6. Poly16: A sixteen voice polyphonic mode.
A word about CPU load and polyphony
When using a maximum of, say, eight voices (notes) use Poly8 mode as this can drastically reduce CPU overhead (if using 4 voices
select Poly4, if 12 Poly12).
There are two reasons for using less than maximum permitted 16 voices:
1. It puts a cap on the processor use and
2. It limits the amount of voices playing when using sounds with long envelope release times.
Keyboard Velocity Response Controls
• Keyboard Track Knob
This allows you vary the keyboard tracking in relation
to the filter cutoff. Choosing a knob position towards
the left opens the filter more on the lower keys of your
keyboard and decreases this effect as you play up the
keyboard. Setting a knob position towards the right of
center has the opposite effect.
Note: Setting the keyboard tracking to a value of one, the filter cutoff frequency tracks the keyboard in the same way the original
OSCar did in the first three (tracked) filter modes. Here, a one octave change on the keyboard gives approximately a one octave
change in cutoff. Setting the tracking to a value of zero means there is no tracking at all as per the no-track filter settings on the
original instrument.
• Attack/Decay Knob
With 12 O’clock being a zero value, turning the knob to the left will shorten the envelope attack times when playing at high
velocities and turning the knob to the right will lengthen the attack time when playing at high velocities.
10
• Release Knob
With 12 O’clock as the zero value, turning the knob to the left will shorten the envelope release times when playing at high
velocities and turning the knob to the right will lengthen the release time when playing at high velocities.
• Velocity – Filter Drive Knob
With both positive and negative settings, the Env1 Filter Drive Knob allows you to set the degree of control note-on velocity has
over the amount of filter drive.
Note: As well as increasing amplitude dynamics, the Filter Drive also introduces ‘overdrive’ – if you do not want to introduce this
to your sound when playing at high velocities make sure you reduce the Filter Drive level accordingly.
• Env2 Peak Knob
With both positive and negative settings, the Env2 Peak knob allows you to set the degree of responsiveness note-on velocity has
over the Filter Envelope.
Filter Drive and Volume Knobs
On the original instrument there was a single knob to perform both these tasks. On the impOSCar
we’ve split these into two knobs allowing a greater range of combinations between subtle and
blitzkrieg ‘overdrive’. For extremely ‘overdriven’ sounds both high filter drive and volume settings
are recommended, and rolling-off the filter drive knob will produce distortion free tones.
Note: Because there is independent control of both filter drive and volume, it’s easy to achieve very high audio output levels. These
can overload the output channel of your host application, therefore it’s important that you take into consideration the balance
between volume, filter drive and your host application mixer output when programming sounds.
Arpeggiator and General controls
Arpeggiator Knob
The impOSCar Arpeggiator contains four arpeggio modes:
1. Up
2. Down
3. Up and Down
4. Random
• Tempo/Arpeggiator Clock Button and LED
As indicated earlier in the Tempo Knob section, the Arpeggiator can be set to ‘Internal’ or ‘External’ synchronization via the Clock
Button. If this is set to ‘Internal Source’ (INT) the Tempo rate is shown as BPM in the Selected Parameter Window. However, if this
is set to External Source (EXT) the Tempo rate is shown as Beats Per Bar in the Selected Parameter Window.
• Keyboard Hold Button and LED
As the name implies, when switched on, this button acts as a hold function for both normal chords and arpeggios. Using this, it’s
possible to play sustained chords and control arpeggiations in real-time with minimal effort.
Edit Mode Knob
Used to close the keyboard and to provide access to parameters besides those shown on the main impOSCar
panel:
• Min: Set to this only the main impOSCar control panel is visible.
• Kbd: Opens the impOSCar keyboard. This mode also gives access to the Pitch-Bend and Modulation wheels.
• W1: Opens the matrix window used to create UserWave1.
In addition to a traditional subtractive method, the impOSCar also allows the user to create and store an assortment of additive
waveforms generated by mixing the fundamental and 23 harmonics.
There are two UserWave locations, the settings from which can be assigned to either or both OSC1 and OSC2. The settings assigned
to each UserWave location can be saved as part of a patch and as individual UserWaves for quick recall. (See the using User Waves
section on page 13).
11
• W2: Similar to the W1 mode but used to create the waveform for UserWave2.
• CC: Selecting this Edit Mode reveals a window above each knob, button or
controller. Here you can select the MIDI Continuous Controller (CC) you wish to
control any impOSCar parameter, extremely useful when using an external control
device that transmits a fixed range of MIDI CC’s. The impOSCar comes with a predefined list of controller numbers (see page 21) but these can be easily changed
to suit your needs.
A MIDI CC ‘learn’ function is also available in this mode. This is activated in the following way:
Click on the green ‘L’ button above any knob. Now move your external controller’s knob or slider.
The MIDI CC value that the external controller knob or slider has transmitted will appear in the
parameter value box.
Mouse Control (System Default window)
By clicking on the System Default window it’s also possible to determine the way the
impOSCar’s knobs react to mouse control. The choices are as follows:
System Default: Simply sets the default control method as determined by your host
application.
Circular: Sets the mouse control method to circular movements.
Linear: Sets the mouse control method to horizontal and vertical movements.
Panel Switches
• Compare - switches between the panel settings you’ve set, and the original ones of the selected
program.
• Reset - puts parameters back to the original ones for that program.
• Store - puts the panel settings into a temporary memory.
• Recall - reads the temporary memory back to the panel.
Effects Section
The impOSCar also features a chorus and delay effects section. This is revealed or closed
by clicking on the Panel Open/Close text situated to the right of the Chorus Level, Delay
Level and Delay Tempo knobs. To turn the effects ON or OFF click on the green Effect
On/Off button. Effects settings are stored as part of an impOSCar patch.
• Chorus Depth Knob
Sets the depth of the chorus effect.
• Chorus Rate Knob
Sets the speed of the chorus effect.
• Chorus Level Knob
Controls the amount of chorus applied to your impOSCar patch.
• Gate Knob
Using the 12 O’clock position as a zero value, turning the knob to the right will produce a ‘gating’ effect, the percentage of which
indicates the drop in delay mix when there is no input signal present. This is especially useful for rhythmic sounds where you want
to make them bigger but keep the sound tight.
Turning the knob to the left will produce a ‘ducking’ function. This will be the percentage by which the delay mix is dropped
when there is signal present and is particularly useful for lead sounds where you want clarity when playing fast runs, and yet still
producing a nice echo within the gaps.
12
• Delay Units Knob
Sets the beat divisions between 32 and 4. Use this in conjunction with the left and right Delay Length Knobs to create interesting
delay times for left and right channels respectively.For example if you want to set a delay time of 3/16 set the delay length to 3
and the units to 16.
• Delay Hi Pass (HP) Filter Knob
Allows you to filter out the low frequency of the delay feedback or signal and lets the high frequency feedback pass through.
• Delay Lo Pass (LP) Filter Knob
Allows you to filter out the high frequency of the delay feedback or signal and lets the low frequency feedback pass through. Used
in conjunction with the HP Filter you can fine-tune the delay feedback so that your sound retains its depth without becoming too
‘muddy’.
• Left and Right Delay Length Knobs
Sets the delay time for the left and right channels between 1 and 32 units. Use these to create wide stereo delays.
• Left and Right Feedback Knobs
Use these to set the feedback level for left and right channels respectively.
• Crossed and Uncrossed Button
Works with the Left and Right Feedback Knobs for different delay effects. When uncrossed, the signal from the left output feeds
back into the left input and the signal for the right output feeds back into the right input. When crossed the signal from the left
output feeds into the right input and the signal from the right output feeds into the left input.
• Left and Right Channel Mix Knobs
Sets the overall level of the left and right delay channels.
• Delay Level Knob
Sets the global level of the delay effect.
• Delay Tempo Knob
Sets the global delay tempo from between 32 and 192BPM with the option to sync to the host application tempo when switched
to MIDI BPM.
Creating and using User Waves
As explained previously, in addition to a traditional subtractive synthesis sound
creation method, the impOSCar also allows the creation of additive synthesis
waveforms via the User Wave Matrix.
To create your own User Wave make sure that you have User Wave 1 selected for
OSC1. Then move the Edit Mode Knob to W1, this reveals the User Wave Matrix
with each of the 24 harmonics being represented by a vertical line of LED’s.
The level of a particular harmonic is increased by switching more of its LED’s on,
conversely switching them off decreases the level of that particular harmonic.
Simply select the desired harmonic by clicking on the bottom of the grid at the
appropriate point and dragging upwards. You’ll see the level of the harmonic
indicated by the position of the red line - the taller the line the louder the
harmonic.
Using this method of sound creation it’s easy to create your own User Waves
which can be named and saved for use within a Patch.
• Storing User Waves
To save a User Wave simply click in the box underneath the User Wave Matrix,
type in your desired name, then click on the green Save button.
13
• Recalling User Waves
All stored User Waves can be quickly assigned to the appropriate oscillator first by dialling-up User Wave1 or 2 via the OSC
Waveform Knob, then by choosing a stored User Wave from either of the User Wave Windows on the main panel. The upper and
lower windows are used to assign User Waves to oscillators 1 and 2 respectively.
Note: When saving a Preset containing a User Wave, the Preset is stored with the actual User Wave values, not the User Wave
name. This is so that changing the contents of a previously named User Wave does not change any other patches using that same
User Wave. For example, let’s say you have several Presets which use the same User Wave, e.g. ‘Full Odds’. During the course of
programming a new Preset you change the harmonics of the ‘Full Odds’ User Wave then store it, any Presets which were previously
using ‘Full Odds’ do not change - they are now simply listed as ‘--Unnamed--’, but the harmonic content of the sound remains
the same.
Using the Arpeggiator
The impOSCar arpeggiator can be used in monophonic, duophonic and polyphonic
modes and although at first glance it looks fairly basic but there are a number of
options that can open up a wealth of creative potential. However, we’re the first to
admit that some of these are not immediately obvious due to the grouping of certain
knobs on the front panel.
Firstly, decide whether you want to synchronize your arpeggio to the host sequencer or set the BPM
with the Tempo Knob in the Triggering section. If you choose to synchronize, click the EXT Clock button
next to the Arpeggiator Knob then choose a beats-per-bar value from the aforementioned Tempo Knob,
the value of which will be shown in the Selected Parameter Value window. Return to the Arpeggiator
Knob and select any of the Up/Down and Random modes, then play a chord. Activating the KBD HOLD
button will hold that arpeggio indefinitely. And free up your hands for other creative pursuits.
Several options are now available to you, including the ability to repeat either
or both of the envelope generators in accordance with the synchronized
tempo value. This is achieved by selecting RPT1, RPT2 or RPT1+2 from the
Triggering Knob. Select RPT1+2 to retrigger both envelopes and you should
immediately notice a difference in the sound of your arpeggiation. From here
try changing the values of certain filter envelope generator controls (such as
decay) and listen to the changes.
You can also alter the gate time of the envelopes via the Gate Time Knob but first, make sure that the release times of both
envelope generators are set approximately halfway. Now turn the Gate Time Knob from right to left and you’ll hear some interesting
changes.
It’s also possible to create patterns synchronizing the LFO to the Arpeggio tempo by selecting either Clock or MIDI via the LFO Sync
Knob. For a more detailed explanation of the sync options check the LFO section on page 11 of the manual, but once you’ve chosen
the most appropriate one, try setting the LFO Waveform to Random before applying it via the LFO Amount Knob.
Finally, experiment with the various Mono/Duo and Poly modes - with the right sounds assigned, duophonic and polyphonic
arpeggio patterns can sound amazing.
Using Duo Mode
To get an idea of how duo mode works set OSC1 to a PWM waveform and set OSC2 to a Square wave
and transpose it two octaves higher then OSC1. Play and hold a single note (middle C) - you will hear
that this triggers both oscillators. Now with the original middle C held down, play additional notes
below and above - you’ll hear that these additional notes are only triggering OSC2 while the original
sustained middle C plays the OSC1 sound.
Keeping the middle C held, add the G below. Having done this, stop playing the original middle C but continue to hold the G. Any
additional notes played will now trigger the OSC1 sound while the original G will play the sound associated with OSC2.
14
MIDI Continuous Control Messages
5
Each of the impOSCar’s parameters responds to a standard MIDI Continuous Control message (MIDI CC’s) as shown opposite.
Additionally the impOSCar responds to the following MIDI CC’s.
CC Pedal Function
64 Sustain(damper) holds all notes played when the pedal is pressed and while it is held
66 Sostenuto holds all notes which were playing at the moment the pedal was pressed
67 Soft multiplies all velocities by 0.5 (changeable on a global basis in the .sup file)
68 Legato if you’re in multi-trigger mode, puts you in single, and vice-versa
69 Hold2 multiplies release times by 2 (changeable on a global basis in the .sup file)
123 All Notes Off
MIDI Guitar
The impOSCar has a feature specifically designed for MIDI Guitar players. In Mono Mode the impOSCar behaves as if it were 16
mono synths in parallel, with separate note and bend control response for each MIDI channel. Make sure your sequencer track is
set to receive on ‘all’ MIDI channels and both your MIDI guitar and the impOSCar are set to a pitchbend range of 12.
15
Logic Parameter List
6
16
Parameter NameShort NameParameter NameShort Name
1 Filter TypeFlt Typ
2 Filter QFlt Q48 <none>Empty 2
3 Filter FreqFlt Frq49 LFO WaveformLfo Wave
4 Filter SepFlt Sep50 LFO RateLfo Rte
5 Filter DriveFlt Drv51 LFO IntroLfo Intro
6 Kbd->FilterKbd Trk52 LFO SyncLfo Snc
7 Env->FilterFlt Env53 LFO->PitchLfo Ptch
8 VolumeVolume54 LFO->FilterLfo Flt
9 Osc1 WaveOsc Wav 1
10 Osc2 WaveOsc Wav 256 <none>Empty 3
11 Osc2 Octave
12 Osc2 TransposeO2 Trns58 Chorus DepthChr Depth
13 Osc2 DetuneO2 Detn59 Delay Left LevelDL Lvl
14 Pulse WidthPW60 Delay Right LevelDR Lvl
15 Master OctaveOctave61 Delay Left FeedbackDL Fbk
Jon wrote his first commercial software program at the age of 14. Later, after graduating from Brunel University with a
degree in Micro-Electronics Engineering, he went on to assist in the development of 3D sound for stereo equipment for EMI
offshoot Sensaura. Aside from being used on several albums such as Frank Sinatra’s ‘Duets’, this technology became one of the
main players in the 3D sound-for-games market, being used in the X-Box. An accomplished engineer, guitarist and keyboard
player, Jon has also worked in a variety of musical instrument industry jobs including, high-end studio design and installation,
synthesizer repair as well as having the dubious pleasure of working for someone who will forever be known as the ‘Clockwork
Chicken’.
A special thanks to Laurent de Soras at Ohm Force for his contributions to the ftt code routines.
Installers: Ohm Force
Artwork: Ian Legge
Without whom dept:
Chris Huggett, Paul Wiffen, Laurent De Soras, Jerome Noel, Raphaël Dingé and all at Ohm Force, Angus Hewlett, Uwe Bauer,
Tim Dorney,
Bruce Satinover, Billy Currie, Rick Smith, Putte, Karl Hyde, Malcolm Corbett,
Lee Groves., Clemens Homburg, Shane Meehan, Darren Price, Orren Merton, Matt Hooper, Andy Abernathy, Martin Hodgson,
Flemming Bloch,
David Motion, Paul Wishart, Nikolaus Gertis, Sascha Kujawa, Mark Moore, Risto Sampola and all on the beta testing team.
And a very special thanks to Jon Hodgson for services way beyond the call of duty and also to his mum for having him!
Sounds by: David Spiers, Paul Wiffen, Matt Hooper, Billy Currie, Rick Smith, Chris Macleod, Mark Moore, Tim Dorney
and Lee Groves.
18
8
Contact
(626) 633-9055 – Tech Support phone lines are open from 7AM to 7PM PST, Monday through Friday.
techsupt@m-audio.com – E-mail Tech Support whenever it’s convenient for you. You will usually receive a response within one
business day.
www.m-audio.com – Check the M-Audio website for any news, FAQs, or updates related to your product. Often, you will find
solutions to your problems here that will save you a phone call to Tech Support.
M-AUDIO U.S. -
5795 Martin Road, Irwindale, C A 91706-6211, U.S.A.