Red Panda PARTICLE 2 Owner's Manual

PARTICLE

Owner’s Manual

Detroit, MI • www.redpandalab.com

1

PARTICLE

Owner’s Manual

Version 2.0 (firmware 2.0.1+)

April 2019

Red Panda LLC

4444 2nd Ave

Detroit, MI 48201

USA

2

©2019 Red Panda LLC

www.redpandalab.com

Please register your product at redpandalab.com/register

Product manuals and firmware updates are available at redpandalab.com/support

For technical support, email [e-mail]

3

Contents

Introduction 5
Getting Started 6
Controls 7
Bypass 9
Freeze 9
Feedback Lowpass Filter (Tone) 10
Modes 11
Combining Modes 14
Control input (expression pedal) 15
Presets 17
Tap Tempo 17
Web Editor (beta) 20

Advanced Configuration 22

Reset to Factory Defaults 22
Using MIDI 23
Support, Repairs, and Warranty 31
Firmware Updates 32

Specifications 33

Credits 33

4

Introduction

Thank you for purchasing the Particle 2. I designed the original Particle in 2010 and released the first
batch in 2011. I drilled, painted, labeled, soldered, and assembled those first pedals in my garage and a
spare bedroom. Thanks to the support of experimentally-minded musicians throughout the world, Red
Panda has been able to grow to a small team and continue to work on hard, interesting projects.

My goal with the original Particle was to take granular synthesis and map it to a real-time eect that
was easy to understand and control. Some of it’s limitations - and character - came from finding clever
ways to do things like reverse delay and granular playback on the Spin FV-1 DSP chip.

New in Version 2

The Particle 2 uses a much more powerful processor, and is a full-fledged granular processor capable
of generating dozens of simultaneous grains. It keeps the immediacy and control of the original Particle,
with improved fidelity, usability, and tweaks some of the knob responses. A primary goal was to make it
more pedalboard-friendly and easier to use on tour.

Some of the improvements include:

• Smaller enclosure, with all jacks on top

• Stereo (TRS) input/output

• Presets (4 on front panel, 127 via MIDI)

• Soft touch switches

• Momentary freeze footswitch

• Tap tempo with note divisions

• Higher sampling rate

• Higher headroom

• Better signal-to-noise ratio

• Improved pitch shifting

• Longer delay time

• Longer maximum grain size

• More simultaneous grains

• Additional parameters

• Ability to combine parameters from dierent modes

• USB MIDI

• Multi-purpose control port for expression pedal, CV, remote switches

• Expression pedal can be assigned to any combination of parameters

• USB firmware updates

5

Getting Started

The Particle™ is a granular delay pedal. It chops your signal into small slices (grains), which are shifted,
randomized, and mangled using the techniques of granular synthesis. Results include radical pitch and
delay modulation, shimmering repeats, time stretching, stutter, and glitch sounds.

The Particle has five delay-based modes and three pitch-based modes. You can combine all of the
modes and access additional parameters via MIDI, saving the results in a preset for live use. Tap tempo
can be used for the delay time, grain size, density, and LFO rate, with dierent note divisions for each.

In the delay modes, the BLEND, DELAY, and FDBK knobs work just like a standard 3-knob delay. Start by

selecting REV (reverse delay), setting the CHOP to 9:00 and
PARAM knob to 5:00.

In REV (reverse) mode, the PARAM knob sets the probability
of each grain playing forward or reverse. The signal will
always be played in reverse at 7:00, always forward at 5:00,
and at 12:00 it will randomly play each grain forward or
reverse. The CHOP knob sets the size of each grain (below
12:00).

Next, change to RND (random delay) mode. The CHOP knob
still sets the size of each audio slice, but now the PARAM
knob sets the randomization range. At 7:00 there is no
randomization, and at 5:00 it randomly jumps within the set

delay time.

To explore each mode, set the BLEND knob to 5:00, CHOP around 9:00, and FDBK to 7:00. Step through
each of the eight modes, adjusting the DELAY/PITCH and PARAM knobs to see how they aect the sound.
Using a looper pedal to repeat a phrase or playing a recording through the Particle will make it easier to
discern the eect.

The FREEZE footswitch holds the signal in the delay line indefinitely while the button is held down, so
you can sample and manipulate a phrase. When the CHOP knob is above 12:00, it sets the threshold
for audio-controlled freeze. The input signal plays through when its level exceeds the threshold. When
the input level drops below the threshold, it starts reading from the delay buer instead. This allows you
to catch the beginning of each note and repeat it. When the chop knob is fully clockwise (5:00), it contin­uously loops. Lower thresholds can create drones in between notes or tape splice eects.

We provide a web-based editor to configure your Particle, access hidden parameters, and fine-tune pre­sets. See "Web Editor (beta)" on page 20 for more information.. It requires the Google Chrome brows­er, and can be accessed at

https://www.redpandalab.com/content/apps/particle-editor/index.html

For live performance manipulation, we recommend using the Touch OSC template available on our web
site, or programming your MIDI controller using the information in "Using MIDI" on page 23.

6

Overview

Controls

6

9

111087

5 12

13

4

14

3
2

TM

15

1

Tap tempo/freeze

2

Preset switch

3

Preset indicator

14

Feedback

5

Wet/dry blend Mode

6

USB MIDI

7

9V DC 250 mA

8

Output

91

10

11

12

13

14

15

16

16

Chop/freeze threshold

Expression pedal

Input

Delay time/pitch shif t

Parameter

Bypass indicator

Bypass/tap division

7

Alternate Controls [DIV]

Press and hold the ON/[DIV] footswitch to adjust tap divisions and alternate parameters. Alternate func­tions are labled [DIV] in the following sections.

To access [DIV] settings:

1. Start with the Particle enabled (blue light on)

2. Hold the ON/[DIV] footswitch until the LED changes to yellow (the pedal will briefly go into bypass)

3. While holding the ON/[DIV] footswitch, adjust the knobs and mode switch as desired

4. Release the ON [div] footswitch to store the settings

BLEND

Adjusts the wet/dry mix, from 100% dry to 100% wet. The dry signal stays at unity gain until 12:00, so
there will be a slight volume boost when the wet and dry signal are combined.

FDBK

Adjusts audio feedback (repeats).

[DIV] Feedback tone (see "Feedback Lowpass Filter (Tone)" on page 10).

CHOP

Adjusts grain size from 7:00 to 12:00. Above 12:00, sets the freeze threshold (see "Freeze" on page

9).

[DIV] sets grain size to a note division.

MODE

Selects one of the delay or pitch modes and which of the parameters are controlled by the DELAY/PITCH
and PARAM knobs.

[DIV] sets delay time to a note division.

DELAY/PITCH

Sets the delay time or pitch shift amount, depending on mode. The pitch shift range is ±1 octave, with no
shift at 12:00.

[DIV] sets delay time to a note division.

PARAM

Adjusts a mode-specific parameter.

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[DIV] sets grain density (interonset time) or LFO to a note division, depending on mode.

Bypass

The right footswitch turns the eect on and o. Tap to toggle between bypass and eect. From bypass,
pressing and holding the footswitch will engage the eect momentarily and return to bypass when you
release.

The Particle remembers its bypass state when power is removed.

Hold down the right footswitch while plugging an expression pedal, CV cable, or remote switch into the
CTRL port to configure the port. See "Control input (expression pedal)" on page 15 for details.

You can also hold down the right footswitch to adjust tap tempo note divisions ([DIV]) and hidden param­eters. See "Tap Tempo" on page 17, and the following sections.

Freeze

When the CHOP knob is above 12:00, it sets the amplitude threshold for freezing the current delay buer.
Holding the TAP/FREEZE (left) footswitch will momentarily turn on freeze mode. The bypass LED chang­es from blue to cyan while freeze is active.

The Particle has two dierent freeze modes:

• grain freeze (default): the delay buer is frozen

• delay freeze (v1): the delay output is recycled

You can change the freeze mode via MIDI or our web editor. It is stored in presets, and will be remem­bered when power is o.

Grain freeze

The delay buer is frozen, allowing you to scrub through the frozen audio without degrading the sound.
The results vary depending on which mode is active:

• DELAY+DENS: repeats a slice of audio with length set by CHOP, DELAY scrubs through buer.

• DELAY+LFO: scrubs through buer at length set by PARAM.

• DELAY+REV: repeats a slice of audio with length set by CHOP, DELAY scrubs through buer.

• DELAY+PITCH: repeats a slice of audio with length set by CHOP, DELAY scrubs through buer.

• DELAY+RND: randomly jumps around buer.

• PITCH+DTUNE: repeats a slice of audio with length set by CHOP.

• PITCH+LFO: repeats a slice of audio with length set by CHOP.

• PITCH+DENS: repeats a slice of audio with length set by CHOP.

Delay freeze

Delay freeze recycles the delay output to its input, like the Particle v1 worked. When the delay time is
changed, the frozen loop is pitch shifted and mangled.

9

REPEATING LAST-PLAYED AUDIO

The Particle is always listening to your signal, even in analog bypass mode. This allows you to repeat a
phrase that you just played. With the Particle in bypass, set CHOP to 100% the DELAY knob to the desired
repeat time, or use tap tempo When you click the ON footswitch, the Particle will enter freeze mode the
the last segment of audio played.

TAP - FREEZE

Since the left footswitch is used for both setting delay time (tap) and freeze (hold), you can use it to set
the freeze time on the fly, in all modes. Tap once, wait, and then press and hold the footswitch. The

length of the frozen segment will depend on the tap division.

Feedback Lowpass Filter (Tone)

You can adjust the cuto frequency of the feedback lowpass filter to control the brightness of the re­peats. The setting is stored in presets, and remembered when power is removed.

To adjust the feedback lowpass filter:

1. Start with the Particle enabled (blue light on)

2. Hold the ON [div] footswitch until the light blinks (the pedal will briefly go into bypass)

3. While holding the ON [div] footswitch, adjust the FDBK knob for the desired tone

4. Release the ON [div] footswitch to store the setting

Realtime adjustment is available via MIDI continuous controller messages.

10

Modes

Mode Delay/Pitch Param Description

DELAY DENS Delay time Grain density

(interonset time)

DELAY LFO Delay range Stretch/compress ratio

(LFO speed)
DELAY REV Delay time Direction probability Reverse delay
DELAY PITCH Delay time Pitch shift amount Delay with random pitch jump
DELAY RND Max. delay time Time randomization range Random delay

PITCH DTUNE Pitch shift Detune amount Detune/pitch clouds
PITCH LFO Pitch shift range LFO speed Pitch modulation
PITCH DENS Pitch shift Grain density

(interonset time)

DELAY + DENS

The delay knob sets the delay time. The param knob controls the density of grains, breaking the incom­ing audio down into blips at lower settings. The chop and param knobs interact in this mode. Get VO­SIM-like eects by setting the chop and delay knobs equal with feedback cranked up.

Delay with grain density

Time stretch/compress

Pitch with grain density

When the CHOP and PARAM knobs are both at higher settings, the audio will perfectly overlap.

DELAY + LFO

Steps through the delay buer at a rate set by the parameter knob. The DELAY knob sets the length of
the audio buer (maximum delay time). Audio plays at normal speed with the param knob at 12:00, is
stretched at lower settings, and compressed at higher settings. The chop knob adjusts the length of each
playback slice. Results can be similar to subtle phasing with short delay times. Longer delays create
time stretching, skip/repeat, and glitchy robot sounds.

For time stretching, adjust the CHOP knob to minimize or maximize audio artifacts.

DELAY + REV

Reverse delay with delay time set by DELAY knob. The PARAM knob controls the probability of each
grain playing forward or reverse. Fully counterclockwise gives a reverse delay. At 12:00, grains are
equally likely to play forward and reverse. The CHOP knob sets the grain size, but also imposes a mini­mum delay. Longer grains reduce artifacts, especially for sustained sounds. Very short grains produce
glitchy tremolo sounds.

For live reverse delay, use tap tempo with DELAY and CHOP set to the same note division. You can also
set CHOP to a smaller note division, so that the phrase is rewound in smaller chunks.

DELAY + PITCH

The delayed signal is randomly pitch shifted up or down by the amount set by the PARAM knob. The DE-
LAY knob sets the delay time. The CHOP knob controls how often the pitch changes.

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DELAY + RND

The DELAY knob sets the maximum delay time. The PARAM knob sets the randomization range. The
CHOP knob controls how often the delay time is changed (size of the audio slices). Short delays create a

chorusing sound. Use longer delays for random beat slicing eects.

With tap tempo, try setting DELAY to a whole note and CHOP to 1/8th or 1/16th note.

PITCH + DTUNE

The PITCH knob sets +/- 1 octave pitch shift. The PARAM knob controls the amount of random detuning
around the set pitch. Each grain is detuned by a random amount, so the CHOP knob controls how smooth
or stepped the eect is.

Lower settings of the PARAM knob will introduce slight detuning, similar to a dual-oscillator synth. As
the PARAM knob is increased, the amount of detuning and number of simultaneous grains will increase.
Higher settings will create pitch clouds.

For organ-like sounds, use little or no detuning (PARAM), +1 octave pitch shift, and high FDBK. The
CHOP knob can be used to fine-tune the pitch shifting, and at higher settings it will introduce a slight
delay between repeats. That is useful for creating "power up" video game sound eects from percussive
sounds.

For chorus or reverb-like sounds, set the PITCH knob for no shift (12:00), use the PARAM knob to add
a bit of detuning, and increase FDBK to create a reverberant sound. The CHOP knob will adjust the
smoothness of the eect.

PITCH + LFO

The PITCH knob controls the range of pitch shift, from one octave down to one octave up. Within that
range, the pitch ramps at a frequency set by the PARAM knob. The pitch changes with each new grain, so
the CHOP knob controls how smooth or stepped the eect is. FDBK can be used to smooth out the eect.

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PITCH + DENS

The PITCH knob sets +/- 1 octave pitch shift. The PARAM knob controls the density of grains, breaking
the incoming audio down into blips at lower settings. The CHOP and PARAM knobs interact in this mode,
and at higher settings there will be multiple overlapping grains.

13

Combining Modes

In its default configuration, the MODE knob will assign the DELAY/PITCH and PARAM knobs to specific
functions and reset the previous mode's parameters. For example, switching from DELAY+DENS to DE-
LAY+LFO will set the grain density so that they perfectly overlap.

You can combine modes in several dierent ways:

• In the pitch modes, use tap tempo to set a delay time.

• Use MIDI to set parameter values. All of the Particle's parameters are available via MIDI.

• Assign the expression pedal to the DELAY/PITCH or PARAM knob in a dierent mode (see "Control
input (expression pedal)" on page 15).

• Use the "modeless" configuration setting to change the behavior of the MODE knob (see next section).

Modeless Configuration Setting

The mode switch reassigns the DELAY/PITCH and PARAM controls without clearing the audio buer.
When switching modes, the PARAM assignment from the previous mode is reset by default. Using MIDI
controller 119 (or our web editor), you can change the behavior of the Mode switch so that the previous
changes are retained. The setting is saved in presets, and also remembered when power is turned o.

When CC 119 is turned on, the MODE switch simply assigns the knobs to dierent parameters. This is
very flexible, but can also be confusing because the hidden parameter settings make it hard to find your
way back after making changes. You can always press the PRESET button to load the next preset, and
when the preset LEDs are o it will reset everything to the current knob settings.

We recommend leaving CC 119 o in normal use, and setting up one or more presets that allow you to
combine modes. The preset gives you a predictable starting point for manipulating the sound live.

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Control input (expression pedal)

The CTRL (control) input supports dierent methods of remotely controlling the eect:

• Expression pedal

• Remote switch

• Control voltage (CV) with 0-3.3V range

To configure a device, hold down the right footswitch while plugging it in. The Tensor will detect which
device is connected using the steps below. You can also use our web editor to configure the port (see
"Web Editor (beta)" on page 20).

The configuration is remembered when the device is unplugged or power is turned o.

Expression Pedal

An expression pedal can be assigned to any combination of knob settings at the heel and toe position (up
to 6 parameters). Moving the expression pedal will morph between the settings.

You can also calibrate the range of the expression pedal, to ensure that its full travel is used.

Calibrating Expression Pedal Range (no knob assignments):

1. Start with the pedal powered on and nothing plugged into the CTRL port.

2. Hold the right footswitch while plugging in the expression pedal. The right LED will blink yellow
three times to indicate it is in CTRL configuration mode. You can release the right footswitch and
begin configuration immediately.

3. Move the expression pedal to the heel down position.

4. Move the expression pedal to the toe down position.

5. Hold the right footswitch for 3 seconds to save the configuration. The right LED will blink green to
indicate that the configuration has been saved.

Configuring Expression Pedal Knob Assignments

1. Start with the pedal powered on and nothing plugged into the CTRL port.

2. Hold the right footswitch while plugging in the expression pedal. The right LED will blink yellow 3
times to indicate it is in CTRL configuration mode. You can release the right footswitch and begin
configuration immediately.

3. Move the expression pedal to the heel down position.

4. Adjust the knobs for the desired sound.

5. Move the expression pedal to the toe down position.

6. Adjust the knobs for the desired sound.

7. Hold the right footswitch for 3 seconds to save the configuration. The right LED will blink green to
indicate that the configuration has been saved.

Knobs that are not adjusted during configuration will not be aected by the expression pedal. Expres­sion pedal assignments are stored in presets and when the expression pedal is unplugged or power is
turned o.

Expression pedals with 5-25 kΩ linear potentiometers work best.

15

Control Voltage

Control voltage input is configured the same way as an expression pedal.

CV Range: 0-3.3V (with over/under-voltage protection)
Tip: 0-3.3V input
Ring: 3.3V output (with current limiting)
Sleeve: ground

The expression input has current limiting in case you use a TS cable, but it is preferable to use a 1/4”
TRS cable with the ring unconnected. We sell a suitable cable at our web site, and the Expert Sleep­ers ‘floating ring’ cable is another option. Instructions for building your own cable are available on our
Knowledge Base.

Remote Switch

A remote switch has up to 4 modes of 4 switches that can access presets and pedal functions. It works
with our remote switches, some third-party switches, and is DIY friendly for dierent control interfac­es. See our Knowledge Base for infomation on building a compatible switch. Note that the switch uses
parallel resistors, and switches with shorting contacts will not work without an adapter (most tap-tempo
switches and the Roland FS-6, for example).

1, 2, 3, and 4-button switches are supported. The modes and functions accessible will depend on the
number of buttons. A single-button switch can load or save your favorite sound.

To save a preset, hold the corresponding button for two seconds. The right LED will blink green to indi­cate that the preset has been stored. Presets are also accessible via the PRESET button and MIDI pro­gram change messages.

Configuring a Remote Switch:

1. Start with the pedal powered on and nothing plugged into the CTRL port.

2. Hold the right footswitch while plugging in the remote switch. The right LED will blink yellow 3 times
to indicate it is in CTRL configuration mode. You can release the right footswitch and begin configu­ration immediately.

3. Press one of the buttons on the remote switch to select a mode.

4. Hold the right footswitch for 2 seconds to save the configuration. The right LED will blink green to
indicate that the configuration has been saved.

Particle firmware 2.0.1 supports one mode, enabling the remote switch to change presets.

Mode Switch Function LED Indication

1 A Preset 1 (hold to save) Blinks green when saved

B Preset 2 (hold to save) Blinks green when saved
C Preset 3 (hold to save) Blinks green when saved
D Preset 4 (hold to save) Blinks green when saved

16

Presets

The Particle stores 127 presets. Presets 1-4 are accessible from the front panel, and all are accessible
via MIDI program change messages. MIDI program 128 resets the parameters to the current knob set­tings. (Note that some controllers label MIDI programs 0-127 and some use 1-128.)

If preset 1-4 is selected, the Particle will remember the current preset when power is turned o and
restore it. That allows it to be gig-ready, without worrying if the knobs have been moved.

Changing the Current Preset

• Press the preset button to cycle through presets 1-4 and the live knob settings.

• Send a MIDI program change message.

Saving a Preset

To save preset 1-4, press the preset button to select the desired preset, then hold the preset button for 2
seconds to store the current settings in that preset location. Note that when you select the preset loca­tion, the sound will change to that preset. After holding the button 2 seconds, the current knob settings
will be saved.

To save any preset (1-127) via MIDI, send a MIDI program change message while holding down the PRE-
SET button (do this without preset 1-4 selected, to avoid accidentally overwriting). You can also save a
preset using a MIDI System Exclusive message (See "System Exclusive (SysEx)" on page 28).

Tap Tempo

Tap the left footswitch at quarter note intervals to set the delay time using tap tempo. The LED will blink
yellow to indicate the current tempo. To cancel tap tempo, quickly double tap the left (TAP) footswitch.

You can set independent note divisions for chop (grain length), delay time, density, and LFO rate. The
tap divisions are stored in presets, and remembered when power is removed. More note divisions are
available via MIDI.

By default, the delay time is set for quarter notes and tap divisions are o for other parameters.

To view or change tap divisions:

1. Start with the Particle enabled (blue light on)

2. Hold the ON [div] footswitch until the LED changes to yellow (the pedal will briefly go into bypass)

3. While holding the ON [div] footswitch, adjust the controls as described below

4. Release the ON [div] footswitch to store the settings

While in tap division mode, the PRESET LEDs blink based on the current tap division (o for none). The
Bypass LED blinks red at quarter notes.

17

Tap tempo LED assignments

Preset 1 2 3 4
Assignment Grain size Density LFO rate Delay

Tap tempo control assignments

Control Tap Division Assignment
CHOP Chop (grain size)
DELAY/PITCH Delay time
MODE Delay time
PARAM DENS: density

LFO: LFO rate

Delay note divisions (MODE knob)

Mode Position Note Division

DENS Whole note

LFO Half note

DTUNE Dotted quarter note

RND Quarter note

PITCH Quarter note triplet

REV Dotted eighth note
LFO Eighth note

DENS Eighth note triplet

18

Delay, chop, and density note divisions (CHOP, DELAY, PARAM knobs)

O (tap tempo disabled)

Whole note Eighth note triplet

Half note 16th note

Dotted quarter note 16th note triplet

Quarter note 32nd note

Quarter note triplet 32nd note triplet

Dotted eighth note 64th note

Eighth note 64th note triplet

LFO note divisions (PARAM knob)

O (tap tempo disabled)

8 measures Eighth note

4 measures Eighth note triplet

2 measures 16th note

Whole note 16th note triplet

Half note 32nd note

Quarter note 32nd note triplet

19

Web Editor (beta)

The web-based Particle editor can be used to configure your pedal, access hidden parameters, and
fine-tune presets. It is intended for "oine" configuration and editing. For live performance editing, we
recommend using dedicated MIDI hardware or software and MIDI control change messages.

Connect your pedal to a computer using a USB cable and go to the web editor URL using Chrome:

https://www.redpandalab.com/content/apps/particle-editor/index.html

The editor uses Web MIDI, which is not supported by all browsers. We ocially support Chrome.

The editor is currently beta software. It is fully functional, but does not look great.

Pedal Status

The web editor indicates whether the pedal is connected. If the status is "not found", ensure that the
pedal is turned on and connected to your computer. Click the refresh button to refresh the status.

Edit

The Edit tab shows all of the Particle's realtime parameters. The on-screen controls are updated to
match the current state of the pedal, but there is a slight lag that may make it unsuitable for live per­formance. The web editor's controls allow higher resolution changes than MIDI continuous controller
messages (up to 24 bits).

Modeless allows you to access parameters from all modes using the pedal's MODE switch. See "" on
page 13 for information.

Freeze Mode changes the freeze behavior as described in "Freeze" on page 9.

Mod

The Mod tab allows you to configure the pedal's CTRL port for an expression pedal or remote switch.
The control port mode (expression or remote) is stored globally, but expression pedal assignment and
remote switch configuration are stored in each preset.

The expression pedal can be assigned to up to 6 parameters, with a minimum/maximum range for each.

Preset

The Preset tab allows you to send MIDI program change messages and save presets to the pedal's on­board memory. Presets 1-4 are also available via the pedal's PRESET button.

20

Config

The Config tab allows you to configure the pedal for your setup. Configuration settings are described in
"Advanced Configuration" on page 22.

If the pedal detects an error condition, a diagnostic code will be displayed on this tab.

This tab also displays the installed firmware version and the input power supply (PSU) voltage. A low
PSU voltage or a standard deviation (std dev) of 0.03 V or more may indicate that the power supply is not
able to provide enough current to properly power the pedal.

JavaScript Console

The JavaScript console prints MIDI System Exclusive data that is sent to the pedal, which can be helpful
when programming MIDI controllers. For realtime parameter manipulation, we recommend using MIDI
continuous controller messages, since they are broadly supported.

21

Advanced Configuration

The Particle uses MIDI System Exclusive messages to access configuration settings. See "MIDI System
Exclusive Messages" on page 28 for a complete list of properties. We provide a web-based editor
(requires Chrome) and a Touch OSC template (for iOS and Android) to make it easier to access these
settings.

Setting maximum input level

The Particle can handle signals up to +5.2 dBu (4 Vpp) in its default setting. The maximum input level
is adjustable using MIDI System Exclusive (SysEx) messages, or via the TouchOSC template we provide.
The Tensor adjusts the input and output levels to maintain a consistent signal level.

If you are using a synthesizer or mixing console and the Particle is clipping, you can increase the maxi­mum input level.

If you are using a quiet instrument, such as single coil guitar pickups or a consumer cassette deck, you
can set the Tensor to a +0.5 dBu maximum input level, which may give a slight improvement in signal-to­noise ratio.

Setting MIDI channel

The Particle transmits and receives on MIDI channel 1 by default. The MIDI channel can be changed
using MIDI System Exclusive (SysEx) messages, or via the TouchOSC template we provide. It is remem­bered when power is o.

Reset to Factory Defaults

Use the following procedure to reset the Particle’s configuration data to factory default settings. This
will erase any advanced configuration and control port settings, but presets will not be aected.

1. With the pedal unplugged, set the mode switch to the PITCH+DENS position.

2. Hold the ON footswitch while plugging in power. The right LED will be solid white.

3. Rotate the mode switch to the DELAY+DENS position.

4. When the factory reset is complete, the Particle will cycle through its LEDs.

5. Power cycle the pedal to continue.

22

Using MIDI

The Particle is a class-compliant USB device, which allows you to:

• Control all parameters of the Tensor

• Access additional hidden parameters

The Particle can work with any USB MIDI host, including:

• Macintosh and Windows computers. The Tensor shows up as a MIDI device and is available to all pro­grams.

• Apple iPad, iPod touch, and iPhone using the Lightning to USB 3 Camera Adapter. We provide
TouchOSC templates for download from our web site.

• Standalone USB MIDI hosts allow you to connect the Tensor to hardware with 5-pin DIN MIDI connec­tors without the use of a computer. Examples include:
iConnectivity iConnectMIDI4+
iConnectivity mio4
Disaster Area Designs Gen3 MIDI controllers with their gHOST option
Kenton MIDI USB Host MkII
MidiPlus USB MIDI Host
Sevilla Soft USB Host MIDI 2
See our Knowledge Base for up-to-date information

The Particle sends and receives on MIDI channel 1 by default. You can change the MIDI channel using
MIDI System Exclusive messages, our web-based editor, or the TouchOSC template available on our web
site. The MIDI channel is remembered when power is o. See "System Exclusive (SysEx)" on page 28
for more information.

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MIDI Continuous Controller Messages

CC Num Destination Notes

4 Expression pedal CTRL input

12 Blend

13 Chop Grain size

14 Freeze threshold 0

15 Feedback

16 Delay

17 Delay random

18 Pitch

19 Pitch detune

20 Pitch random

21 Density

22 Direction 0

25 LFO rate

1-126
127

1-126
127

O
Threshold
On

Reverse
Probability
Forward

27 Feedback Lowpass Filter

80 Freeze 0-63

81 Eect on 0-63

88 Eect on

(receive only)

89 Ta p

(receive only)

24

64-127OOn

Bypass

64-127

0-63
64-127

Eect

Bypass
Eect

64-127 Ta p

CC Num Destination Notes

102 Mode 0

1
2
3
4
5
6
7

103 Chop/freeze 0-63

64-127

Pitch/density
Pitch/LFO
Pitch/detune
Delay/random
Delay/pitch
Delay/reverse
Delay/LFO
Delay/density

Chop
Freeze threshold

104 Delay/pitch

Depends on current mode

105 Param Depends on current mode

106 Delay note division See “Note Divisions” table

107 Density note division See “Note Divisions” table

108 Chop note division See “Note Divisions” table

109 LFO rate note division See “Note Divisions” table

118 Freeze mode 0

1

119 Mode switch reassigns knobs 0-63

64-127

Grain freeze
Delay freeze (V1)

O (default)
On (combine modes)

25

Pitch Semitone (CC 18) Mapping

MIDI CC Value Transposition MIDI CC Value Transposition

0-4 -1 octave 64 Unison

9 -M7 69 m2
14 -m7 74 M2
19 -M6 79 m3
24 -m6 84 M3
29 -P5 89 P4
34 -d5 94 d5
39 -P4 99 P5
44 -M3 104 m6
49 -m3 109 M6
54 -M2 114 m7
59 -m2 119 M7
64 Unison 124-127 octave

26

Note Division Continuous Controller Values

Allowable values for each parameter are limited by the minimum and maximum parameter values. Note
that values are grouped by dotted/basic/triplet notes for each division and are not in strictly decreasing
order.

CC Value Note Division

0 O (tap tempo disabled)

1 8 measure
2 7 measures
3 6 measures
4 5 measures
5 4 measures
6 3 measures
7 2 measures

8 2 measure triplet
9 Dotted whole note

10 Whole note

11 Whole note triplet
12 Dotted half note
13 Half note
14 Half note triplet
15 Dotted quarter note
16 Quarter note
17 Quarter note triplet

18 Dotted eighth note

19 Eighth note

20 Eighth note triplet

21 Dotted 16th note

22 16th note
23 16th note triplet
24 Dotted 32nd note
25 32nd note
26 32nd note triplet

27 Dotted 64th note
28 64th note
29 64th note triplet

30 Dotted 128th note

31 128th note

27

MIDI System Exclusive Messages

The Particle uses MIDI System Exclusive Messages to get and set configuration properties and state.
The protocol is very similar to MIDI Capability Inquiry (MIDI-CI) Property Exchange, but the defined prop­erties and semantics for MIDI-CI Property Exchange are not part of the MIDI-CI specification and have not
been published as of March 2019.

The following System Exclusive messages can be used to configure the particle, read current configura­tion, and access other functionality that is not available through standard MIDI messages (for example,
saving presets to internal memory). You can use these messages to write a custom editor or configure
a MIDI controller to control the Particle. Our web editor prints the System Exclusive messages that it
sends to the JavaScript console, so you can perform an action using the web editor and then copy the
SysEx to your controller.

The basic format is the same for all messages:

Byte (hex) Description
F0 System Exclusive (SysEx)
00 Red Panda ID byte 1
02 Red Panda ID byte 2
23 Red Panda ID byte 3
01 Particle family ID
01 Particle product ID
00 Message version
1 byte Message type:

0x34: get property
0x35: reply to get property

0x36: set property
2 bytes Property ID
nn bytes Property data (length depends on ID)
F7 End of Exclusive (EOX)

Example: Save Preset to Internal Memory 3

Byte (hex) Description
F0 System Exclusive (SysEx)
00 Red Panda ID byte 1
02 Red Panda ID byte 2
23 Red Panda ID byte 3
01 Particle family ID
01 Particle product ID
00 Message version
36 Set property
7F Save preset to memory byte 1
13 Save preset to memory byte 2
03 Preset location (0-based program change number)
F7 End of Exclusive (EOX)

28

Properties

Firmware Version

Get Set ID 1 ID 2 Data Bytes Data
X 7F 01 8 Firmware version:

0: Major
1: Minor
2: Patch
3: Release type (ascii)
4-7: Build number

Returns the firmware version.

Error Code

Get Set ID 1 ID 2 Data Bytes Data
X 7F 0A 10 2 32-bit integers,

each encoded in 7-bit bytes

Returns a diagnostic error code that can assist Red Panda in troubleshooting problems.

Input voltage

Get Set ID 1 ID 2 Data Bytes Data
X 7F 0B 2 100 * PSU voltage in Volts

Returns the approximate input voltage. Can be useful for diagnosing power issues.

Maximum input level (headroom)

Get Set ID 1 ID 2 Data Bytes Data
X X 7F 10 1 01: +7.2 dBu max (5.0 Vpp)

02: +5.2 dBu max (4.0 Vpp) (default)
03: +0.5 dBu max (2.3 Vpp)

Adjusts the input/output gain to accommodate dierent signal levels.

MIDI Channel

Get Set ID 1 ID 2 Data Bytes Data
X X 7F 12 1 00: channel 1 (default)

01: channel 2
...
0F: channel 16

Get or set MIDI channel.

29

Save preset

Get Set ID 1 ID 2 Data Bytes Data

X 7F 13 1 Preset location (MIDI program number)

Save a preset to internal memory.

Kill dry

Get Set ID 1 ID 2 Data Bytes Data
X X 7F 14 1 00: normal

01: kill dry

Kill dry on/o.

Get / Set Parameter Value (high resolution)

Get Set ID 1 ID 2 Data Bytes Data
X X yy yy 1 U1.23 fixed point value encoded as 4

7-bit digits

Uses internal parameter IDs to get and set parameters with high resolution. The property IDs (yyyy) are
not currently documented, but can be found using our web editor. We reserve the right to change the IDs
and data format, so please email us if you plan to use them (or have any questions). Values are unsigned

1.23 fixed point numbers from 0 to 1, inclusive.

30

Support, Repairs, and Warranty

Technical Support

Please register your product at redpandalab.com/register within 30 days of purchase.

For technical support, send your question via email to [e-mail] or use the contact

form on our web site. Be sure to include your serial number. We are a small company with limited re-

sources for technical support, so it might take us a few days to reply.

Product manuals and firmware updates are available at redpandalab.com/support

Repairs

If you think your product needs repair, first send an email with your serial number and a description of
the problem to [e-mail]. We may be able to get you up and running again without
sending in the pedal, but if it does need repair we will arrange for it to come back to us or an authorized
service center close to you. Warranty repairs are done for free, and non-warranty repairs will be done at
the lowest possible cost to you.

Warranty

This product is warranted against defects in materials and workmanship for one (1) year from date of
original purchase. It does not cover damages or wear resulting from accident, misuse, abuse, or unau­thorized adjustment and/or repair. Should this product require service (or replacement at our option)
while under warranty, please contact [e-mail].

31

Firmware Updates

The Particle’s firmware can be updated via drag and drop using any Mac or PC. No driver or special soft­ware is required.

To tell which version of firmware your pedal is running:

1. Hold down both footswitches and connect power.

2. The right LED will blink blue.

3. Continue holding both footswitches for 2 seconds.

4. The LED will turn solid blue. The pedal is now in USB Mass Storage mode.

5. Connect the pedal to the computer using a mini USB cable.

6. Open the PARTICLE drive on your computer.

7. Open the VERSION.TXT file in a text editor.

Downloading the new firmware

1. Go to http://www.redpandalab.com/downloads/#particle

2. Download the firmware (.zip) file to your computer.

3. Unzip the downloaded file to extract the binary firmware file (.bin).

Caution

• Do not rename the extracted file.

• Never turn o the pedal’s power while an update is in progress. Otherwise the system software or
the pedal itself may be destroyed.

Update procedure:

1. Hold down both footswitches and connect power.

2. The right LED will blink blue.

3. Continue holding both footswitches for 2 seconds.

4. The LED will turn solid blue. The pedal is now in USB Mass Storage mode.

5. Connect the pedal to the computer using a mini USB cable.

6. Open the PARTICLE drive on your computer.

7. Drag and drop the firmware binary (.bin) file to the PARTICLE drive.

8. The red preset LEDs will light in sequence to show progress.

9. After the firmware update is complete, the LED will turn solid green.
If the firmware update seems to stall, eject the PARTICLE drive from your computer and it should
resume. If not, retry the procedure.

10. If an error occurred, the red LED will blink instead.

11. Eject the PARTICLE drive from your computer:
Mac: click the eject button or drag the TENSOR icon to the trash
Windows: right-click on the PARTICLE icon in My Computer and select “Eject”

12. Disconnect the USB cable.

13. Turn the pedal’s power o.

Troubleshooting

If the left LED blinks red, turn the Particle o, then on, and try again.

If you continue to have problems, please email [e-mail]. Please tell us which LEDs
are on, what type of computer, and which operating system you are using.

32

Specifications

Maximum input level: +0.5 dBu (high gain)

+5.2 dBu (default)

+7.2 dBu (max)
Frequency response: 20-20 kHz, +0/-0.5 dB
Input impedance: 1 MΩ
Output impedance: < 1 kΩ
Bypass: analog buered

Power supply: 9V DC, center negative
Power connector: 2.1mm I.D. x 5.5mm O.D. barrel connector

Power consumption: 200 mA
Dimensions: 78 (W) x 124 (D) x 59 (H) mm

3.1 (W) x 4.9 x 2.3 (H) inches

Weight: 0.4 kg / 14 oz

Design and engineering Curt Malouin
Documentation Curt Malouin
Graphics Sylvie Demers
Eric Iverson
Morgan Marentic
Testing Sylvie Demers
Randy Molina
Andy Pitcher

Credits

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