Kenton OB-1 User Manual

INSTRUCTIONS FOR MIDI INTERFACE

OBERHEIM OB-1

USING THE MIDI INTERFACE - - -

When you turn on the synthesiser for the first time, you will be in
omni-on mode for receive (all channels). When you select a receive
channel or other set-up, this will be stored in non volatile memory
to be recalled when you next turn on the synth - all settings listed
on the next page are stored.

If you want to put the machine back to the factory default settings
at any time, switch the synth on whilst holding the red push button
pressed - hold for a couple of seconds then release.
See next page for factory default settings.

SWITCH
When the switch is in the up position (normal) - MIDI will be
disabled and all controllers will be reset to their default values
so that the synth behaves completely normally & with no MIDI control.
When the switch is in the down position (MIDI) - MIDI is enabled
and the primary source of control is from the incoming MIDI signal.

RED PUSH BUTTON
Two modes are available by pushing the red push button. Before you
press the red button however, make sure that no notes are pressed on
the synth otherwise the results may be unpredictable.
The keyboard notes required for set-up & transpose modes should be
sent via MIDI from an external keyboard. (DX7/D50 etc. etc.)

1) SET-UP MODE - Setting MIDI channels and assignments.
Give the red push button a short press (half a second) - then release.
Follow this with a note or sequence of notes (on the remote keyboard)
as detailed on page 2. After selecting a channel you will be
automatically returned to playing mode but after making assignments
you will need to press the ENTER key (Top C) to return to playing
mode. This is to enable you to make the multiple key presses required
when re-assigning sources to destinations.
(N.B. set-ups are stored in non volatile memory).

2) TRANSPOSE MODE ­ Press and hold the red push button for four seconds - then release.
Middle C will sound on the synth and continue to sound until you
press a key (on the remote keyboard). The note that you press will
become the new middle C for MIDI IN. You can set any value up to two
octaves up or down. Settings outside this range will be ignored.
Note that transpose mode cannot be entered from set-up mode.

ASSIGNING MIDI CONTROL SOURCES TO DESTINATIONS - - - (***=not used)

The available MIDI control sources are:­ Aftertouch / Controller X / Controller Y / Velocity / ***
The available destinations are:­ Modulation / Pitchbend / Filter cutoff (vcf) / ***
The options and defaults for each source can be seen on the next page.

C Receive channel 1 [Bottom C on DX-7] MIDI note 36 (24h)
Db " " 2
D " " 3
Eb " " 4
E " " 5
F " " 6
Gb " " 7
G " " 8 Selecting a receive channel
Ab " " 9 will automatically put the
A " " 10 MIDI into omni off mode.
Bb " " 11 That is, it will receive on
B " " 12 the selected channel only.
C " " 13
Db " " 14
D " " 15
Eb " " 16
E Omni-on mode (default)
F Not used - ­ Gb Not used - ­ G Not used - ­ Ab Not used - ­ A Not used - ­ Bb Not used - ­ B Not used - ­ C Not used - - [Middle C] MIDI note 60 (3Ch)
Db Not used - ­ D Not used - ­ Eb Not used - ­ E Not used - ­ F Not used - ­ Gb Not used - ­ G Not used - ­ Ab Not used - ­ A Not used - ­ Bb Notes not retriggered
B Notes are retriggered (default) [also known as multiple trigger]
C Lowest note takes precedence
Db Newest note takes precedence (default)
D Highest note takes precedence
Eb Not used - ­ E Not used - ­ F p.bend & mod wheel off
Gb p.bend ON (default)
G mod wheel ON (default)
Ab controller Y - ignored (see page 3 re controller Y)
A " - vcf
Bb " - *** (default) (*** not used with this synth)
B controller X - ignored (see page 3 re controller X)
C " - vcf (default)
Db " - ***
D aftertouch - ignored
Eb " - modulation (default)
E " - p.bend (up only)
F " - vcf
Gb " - ***
G velocity - ignored (default)
Ab " - vcf
A " - ***
Bb MIDI volume - ignored
B " - *** (default)
C ENTER key - Press and release. [ Top C ] MIDI note no. 96