name likely to change

Inspired by analog synths such as:

• Moog Prodigy, Rogue, MG-1, and Sub Phatty
• Arturia Microbrute/Minibrute
• Sequential Pro-One
• Arp Odyssey

Besides sound quality, the main goal is for this to be super accessible and easy to get a good sound out of - much like many classic analog monosynths. Of course, I also don't want it to only have 1 or 2 good sounds with no variation, so the aim is a good tradeoff between accessibility and versatility. One thing's for sure: it's not meant to be a powerful "do everything" monster synth.

• 2 Oscillators + sub
• Variable oscillator shape:
  • Pulse width modulation for square wave
  • Similar timbral controls for saw & tri waves
• Analog imperfections:
  • Slight VCO tuning instability
  • Imperfect oscillator waveforms
• Dirtiness:
  • Ring mod
  • Filter overdrive
  • VCA distortion
• High quality:
  • Anti-aliased oscillators
  • High-quality filters (without unit delay in the feedback path)
  • Internal oversampling (typically to 176.4 or 192 kHz)

(See todo.md for a detailed list of what needs to be done)

The core features are all implemented, and most quality features are in place - although there's still room for some improvements. But a few parts aren't implemented yet (their GUI controls won't do anything). It could also use a lot of optimization, both in terms of general CPU usage and possible audio dropouts (currently the audio callback has some memory allocation and other non-realtime-safe behavior). The filter algorithm needs a little bit of work too.

The GUI is not final. Hopefully the layout should be somewhat final, but it could still use some visual cleanup and a few things added. I also want to add some visual aids you wouldn't see on a real hardware synth, like an arc on the various knobs to show how they're being modulated.

Here is what the GUI looks like at the moment: (click to enlarge)

• Fully automatable parameters
• "Underneath the panel" controls - I don't want to rely heavily on these, as accessibility is one of my main goals. But I also don't want the front panel to be too cluttered, so there are a few things I have in mind for "page 2". They could almost be treated like mods to a hardware synth, or in some cases even just the types of calibration tweaks you'd get with an analog synth. I don't want these to be completely "under the hood" though - I'm hoping to have some sort of visual indication on the front panel that things have been modified.
• Patch storage/management - I don't expect to have an incredibly complicated patch manager, but I do want to have something. At the very least, it will support DAW-based patch management, but I may have a onboard patch storage as well.

These are all features I don't plan on implementing for 1.0, but might be interested in adding in the future:

• Sequencer & arpeggiator
• Monophony priority modes besides last-note
• Filter/VCA feedback distortion

I don't plan on adding polyphony/unison - I would rather make a synth designed for it in the first place (again, that might be coming later...).