images via this auction"Kenton upgrade specification:
Kit to add CV / Gate / Filter / Acent / Slide sockets to the Roland TB-303
When used in conjunction with one of our MIDI to CV converters, such as the Kenton Pro-2000, these five additional sockets will enable the synth to be played from a MIDI keyboard or MIDI sequencer.
The inputs are on 3.5mm mono jack sockets which provide the following control:
CV - provides Volt per Octave control over the oscillator frequency
Gate - controls when notes play (0 volts = note off / >3 volts = note on)
Filter - controls the cutoff frequency of the low pass filter (from aux out of converter)
Accent - turns on or off the accent feature (0 volts = accent off / >3 volts = accent on)
Slide - turns on or off the slide feature (0 volts = slide off / >3 volts = slide on)
The kit contains all necessary components and diagrams for connecting the wires / components, and mounting the four 3.5mm mono jack sockets.
Used with a Kenton Pro-2000 this kit will give you the following control over the synth from a suitable MIDI keyboard or sequencer:
Notes - Around four and a half octaves range - (this is not limited by the kit or converter, but by the synth itself)
Pitchbend - range can be set in the converter
Modulation - from converter's inbuilt LFO. Speed and waveshape can be changed in real time.
Portamento (slide) - rate can be changed in real time.
Filter cutoff frequency - can be controlled using any continuous MIDI controller (cc) or other MIDI message such as Aftertouch or Velocity
Low / High / Recent note priority - can be set in the converter
Single / Multiple note trigger modes - can be set in the converter
Accent - turn the TB-303s inbuilt accent feature on or off using MIDI control
Slide - turn the TB-303's inbuilt slide feature on or off using MIDI control
See the specifications of the Kenton Pro-2000 for further features."
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