Dupertuis Electronique SA

Michigan Synth Works MultiFX Processor
This is an 8HP mutifx processor based on the Spin FV-1 DSP chip.
Audio: 
The hardware offers stereo in, stereo out. Level and mix control on both channels. The right hand input is normalised to the left hand input for mono in/stereo out (this configuration still provides independent level/mix adjustment for each channel). 
Full stereo depends on the program running. A few are stereo in, stereo out. Many are mono in, stereo out. Some are mono in, mono out. 
Suggested 32KHz crystal provides max 1sec delay times at ~15KHz bandwidth.
CV control: 
The FV-1 provides three control voltage inputs. Dervish provides summed pot & external CV for each of these. External CV range is /-5V with the corresponding pot centred. « Prog Adv » used to advance the program.
Programs: 
11 banks of 8 programs. The FV-1 can address a single bank of 8 effects/programs stored in an external i2c EEPROM. Dervish expands support to 11 banks of 8 effects (binary text) by using a larger EEPROM & storing the extra banks above the 4KB addressed by the FV-1. An ATTiny MCU provides the ability to switch banks by copying the new bank into the FV-1’s addressable space. A 4-pin connector exposing the i2c bus is provided so you can customise the content of the EEPROM.
Physical: 
Physical: 8HP, 35mm depth behind panel without power cable fitted 
Electrical: Current 90mA @ 12V, 22mA @ -12V (current consumption is mostly the FV-1, so 12V will vary slightly depending on the running algorithm) 
Default Installed Programs (4/11 Banks):
Bank: 0
Bank Name: uDervish Misc Reverb
Prog 0: PA VocalProg 1: Large HallProg 2: Small HallProg 3: Stereo PlateProg 4: Large Stereo PlateProg 5: Tight Stereo PlateProg 6: v Tight Stereo PlateProg 7: Malekko Reverse Rev
Bank: 1
Bank Name: uDervish Misc Reverb
Prog 0: PA VocalProg 1: Large HallProg 2: Small HallProg 3: Stereo PlateProg 4: Large Stereo PlateProg 5: Tight Stereo PlateProg 6: v Tight Stereo PlateProg 7: Malekko Reverse Rev
Bank: 2
Bank Name: Dattorro Mix ReverbsProg 0: 1k VarPrDelay VarDmpProg 1: 2k VarPrDelay VarDmpProg 2: 4k VarPrDelay VarDmpProg 3: 8k VarPrDelay VarDmpProg 4: VarFilter VarPrDelayProg 5: VarFilter VarDampingProg 6: 4k 1oct PShift I/PProg 7: 4k VarPShift I/P F/B
Bank: 3
Bank Name: uDervish Misc Delay1
Prog 0: Drv102 1hd reverbProg 1: Drv102 2hd reverbProg 2: Simple PingpongProg 3: Simple Pingpong 2:1Prog 4: Dubbel PingpongProg 5: Greenwood DelayProg 6: Dual LFO ChorusProg 7: St PitchShift FB Dly
Bank: 4
Bank Name: uDervish Misc Delay2
Prog 0: drv103Prog 1: drv103 reverbProg 2: drv103 ppong 2:1 rvbProg 3: drv103 2hd 2:1 rvbProg 4: clksync echoProg 5: clksync pingpong 2:1Prog 6: drv103 clksyncProg 7: drv103 clksync pp 2: