An instrument for playing drones on the Playdate. Buy on itch.io

• Connect Playdate to your computer via USB-C (this wont work on mobile (yet))
• Open orllewin.uk/resonance/ in Chrome
• Toggle the Playdate screen off and on again (hardware button on top of the device), this enables the serial interface
• Click 'Request USB Access' from the webpage.

If successful you should now be able to control the audio effects from the web browser.

Terminate all commands with a newline char: \n. All numeric arguments should be integers in range 0 to 100, they're normalised internally to suitable values.

• wf - waveform select. Options are sine, square, sawtooth, triangle, phase, digital, vosim, noise. Example: wf vosim\n

• wfp1 and wfp2 - waveform parameter. When waveform is phase, digital, or vosim there are two synth parameters available that change the character of the sound. Example: wfp1 40\n\

• plyr - add player/visitor. Screen coordinates and size. Example: plyr 40 200 120\n

• note - add note. Any midi note value with screen coordinates. Example: note 48 200, 120\n

• octu - move all notes up an octave

• octd - move all notes down an octave

• clr - remove all current notes and visitors. Resonance will be left in an empty state with a single visitor.

• patch - tells Resonance to print the current patch to serial out

All delays have a max time of 3 seconds, which would be sent as 100 over the serial interface. 1.5 seconds would be 50. Delay volumes are capped at 0.5 internally to help tame runaway feedback, so the serial values 0 to 100 internally are between 0.0 and 0.5. You're unlikely to want to set delay feedback to more than 50 unless you're controlling it live. The Playdate engine seems to have a buffer overflow when delay is allowed to feedback too much, so keep it under control to avoid nasty audio glitches.

The effects are all added in series on the main audio channel, the order is: Synths > Pre-delay > RingMod > Bitcrusher > Overdrive > Mid-delay > Low-pass > High-pass > Post-delay > Output

See Inside Playdate - Effects for more information on the Playdate audio engine effects.

A delay applied to the synths before any other effect

• pdt - Pre-delay time
• pdf - Pre-delay feedback
• pdm - Pre-delay 'mix' (volume really)

• mdt - Mid-delay time
• mdf - Mid-delay feedback
• mdm - Mid-delay volume

• psdt - Post-delay time
• psdf - Post-delay feedback
• psdm - Post-delay volume

• lpf - Low-pass frequency
• lpr - Low-pass resonance
• lpm - Low-pass mix

• hpf - High-pass frequency
• hpr - High-pass resonance
• hpm - High-pass mix

• odg - Overdrive gain
• odl - Overdrive limit
• odm - Overdrive mix

• bca - Bitcrusher amount
• bcu - Bitcrusher undersampling
• bcm - Bitcrusher mix

• rmf - Ring-mod frequency
• rmm - Ring-mod mix

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