Related Manuals for HKA Bit One MIDI Upgrade v2
Summary of Contents for HKA Bit One MIDI Upgrade v2
- Page 1 Bit One MIDI Upgrade v2 Installation & User Instructions HKA Design May 2025 www.hkadesign.org.uk...
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Page 2: Before You Start
Before you start: Your Bit One needs to be fully working – if it has underlying faults, installing the MIDI upgrade board will not fix them for you and will probably make any troubleshooting efforts more difficult. The Bit One is unfortunately not a synth known for its reliability. The most notable weak points are the internal connectors –... - Page 3 Yellow wire to R34 bottom pin Purple wire to pin 13 of IC1 Cut track going to pin 13 Green wire to mod wheel bottom left pin Orange wire to jumper link Brown wire to mod wheel bottom right pin Blue wire to R10 right pin Grey wire to D7 anode White wire to D6 anode...
- Page 4 Calibration The MIDI upgrade board is supplied fully tested and pre-calibrated in a Bit One, however due to variation between units and calibration of the synth itself, some adjustment may be required. These adjustments must be done with the power on, so exercise caution when working - there is live mains voltage present in the power supply section.
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Page 5: Changing Settings
Changing settings The MIDI upgrade board’s settings are configured with keys on the keyboard while the synth is in tape mode, indicated by the TAPE LED being illuminated. Original tape load / save functions remain unchanged. See next page for full explanation of settings. Settings are stored in non-volatile memory and are recalled at power-on, with the exception of bypass mode and arpeggiator active, which always default to off at startup;... -
Page 6: Loading Default Settings
MIDI receive channel 1-16 (default = 1) Sets the MIDI channel on which the Bit One will receive MIDI messages. Setting any channel 1 to 16 will also turn off bypass mode (see below). Bypass mode (default = off) If bypass mode is active, the MIDI upgrade board’s features (pitch bend, mod wheel, sustain pedal, arpeggiator and channel filter) are all turned off and all MIDI messages are passed straight through to the Bit One’s CPU, regardless of type or channel. -
Page 7: Midi Implementation
MIDI implementation Note On / Off Program Change Pitch Bend Channel Aftertouch (duplicates functionality of modulation wheel) Clock / Start / Stop / Continue (used for arpeggiator function) System Exclusive (forwarded to main CPU when bypass mode enabled) Control Change: Number Function Range...
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