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"Multi FX 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 normalized 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 centered. "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 customize the content of the EEPROM."
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