Reader Goat Monster let us know about an unofficial firmware upgrade for the classic Sequential Circuits Prophet 600 that adds a lot of features, including greater resolution for sound parameters, faster envelope generators, new LFO function generator, advanced MIDI in control and more.
Here’s what the Prophet 600 firmware update offers:
- Non-destructive firmware drop-in replacement of the new firmware.
- Greater resolution of many of the sound parameters with an improved refresh rate that is making the instrument much more responsive.
- Faster, smoother amplifier and filter envelope generators supporting four different modes:
- Fast Linear
- Slow Linear
- Fast Exponential
- Slow Exponential
- A new LFO function generator with a wider range from one cycle every to about 60Hz with four new waveforms in addition to the original triangle and square including sine, random stepped, noise (like on the original Prophet 5, but non-periodic) and sawtooth (ramp up)
- Multiple keyboard modes including:
- Poly first note priority
- Unison (all voice) Hi-key priority
- Unison (all voice) Low-key priority
- Solo (one voice) Hi-key priority
- Solo (one voice) Low-key priority
- Mix Overdrive which now allows the output from both oscillators to drive the mix
- Pitch Wheel interval selection of plus/minus one octave, a minor third and a fifth
- Pitch Wheel reassignment to the VCF and Volume or off
- Modulation wheel intensity setting from Maximum to Medium to Minimum
- Full Midi In control including:
- Amp and Filter velocity sensitivity with an external keyboard controller
- Continuous Controllers (CC) of all sound parameters
- Program change (PC) to choose current preset
- A new and improved tuning procedure
- Chromatic and free Oscillator course pitch control
- Plus/Minus setting for Oscillator Fine Tune and Filter Envelope amount for Poly Mod and Filter
- Assignable, Random And Up/Down Arpeggiator
- Debounce feature that prevents unintended retriggering caused by the old keyboard
The update is available via github.
If you’ve tried this firmware upgrade, let us know what you think of it!
Image by bdu