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kennethreitz 42153bbd5a Add 14 new instruments — 83 total

New presets: analog_bass, analog_pad, drift_saw, drift_square,
mellotron, mellotron_choir, mellotron_flute, mellotron_strings,
ring_mod_bell, ring_mod_metallic, sync_lead, sync_lead_bright,
wavefold_gnarly, wavefold_warm.

Upgraded to PyTheory v0.40.9 (local editable via uv).

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

2026-04-02 23:18:32 -04:00

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Synthesized instrument and drum presets for the Teenage Engineering OP-XY and OP-1, generated from PyTheory's synthesis engine.

Every sound is rendered from scratch — no samples were harmed in the making of this repo.

Getting the Presets ⬇️

Click this link: Download ZIP (~200 MB)
Your browser will download a file called pytheory-opxy-main.zip
Double-click the zip file to unzip it (on Mac it will unzip automatically)
You'll see a folder called pytheory-opxy-main — that's everything

Installing on Your OP-XY

You'll need Field Kit, a free app from Teenage Engineering for managing presets on your OP-XY.

Download and open Field Kit on your Mac
Plug your OP-XY into your Mac with a USB-C cable
Your OP-XY will show up in Field Kit — click on it
Open the presets folder on your device
From the pytheory-opxy-main folder you downloaded, drag these into the presets folder:
- opxy-samples/pytheory/ — all 83 instruments
- opxy-samples/pytheory-drums/ — all 12 drum kits
Done! The presets will show up on your OP-XY right away

Installing on Your OP-1 / OP-1 Field

Plug your OP-1 into your computer with a USB cable
On the OP-1, go to TE > USB Disk to enter disk mode
Your OP-1 will show up as a drive on your computer (like a USB stick)
Open the synth > user folder on the OP-1 drive
From the pytheory-opxy-main folder you downloaded, open op1-samples/pytheory/
Copy all the .wav files into the OP-1's synth/user/ folder
Eject the OP-1 drive and exit disk mode
Load the samples using the Sampler synth engine on the OP-1

Instruments

83 multisampled instruments, each with 6 samples across the keyboard (C2, C3, C4, A4, C5, C6). Sustained instruments (strings, winds, organ, pads) loop seamlessly while you hold a key and release when you let go. Plucked and percussive instruments play through naturally.

  Keys         piano, electric_piano, wurlitzer, pipe_organ, organ,
               harpsichord, celesta, music_box

  Strings      violin, viola, cello, contrabass, string_ensemble

  Woodwinds    flute, clarinet, oboe, bassoon, saxophone,
               alto_sax, tenor_sax, bari_sax

  Brass        trumpet, trombone, french_horn, tuba, brass_ensemble

  Plucked      acoustic_guitar, electric_guitar, clean_guitar,
               crunch_guitar, distorted_guitar, orange_crunch,
               metal_guitar, bass_guitar, upright_bass, harp,
               sitar, pedal_steel, banjo, mandolin, mandola,
               ukulele, koto

  Mallet       marimba, vibraphone, xylophone, glockenspiel,
               tubular_bells, timpani, crotales, tingsha,
               singing_bowl, singing_bowl_ring, kalimba, steel_drum

  Mellotron    mellotron, mellotron_strings, mellotron_flute,
               mellotron_choir

  Synths       synth_lead, synth_pad, synth_bass, acid_bass,
               granular_pad, granular_texture, vocal, choir, 808_bass,
               sync_lead, sync_lead_bright, analog_pad, analog_bass,
               drift_saw, drift_square, wavefold_warm, wavefold_gnarly,
               ring_mod_bell, ring_mod_metallic

  Other        theremin, harmonium, accordion, didgeridoo, bagpipe

Drum Kits

12 drum kits, up to 24 hits each, mapped to OP-XY drum keys 53–76.

  standard     24 sounds   full GM kit
  latin        20 sounds   congas, bongos, timbales, agogo, guiro
  metal        14 sounds   tight kick/snare/hat + toms & cymbals
  marching     14 sounds   snare, quads, 5 bass drums, crash
  world        15 sounds   djembe, doumbek, cajon, rainstick
  tabla         7 sounds   na, tin, ge, dha, tit, ke, ge_bend
  dhol          6 sounds   dagga, tilli, both + dholak
  mridangam     4 sounds   tham, nam, din, tha
  djembe        3 sounds   bass, tone, slap
  doumbek       3 sounds   dum, tek, ka
  cajon         4 sounds   bass, slap, tap, slap_snare
  effects       6 sounds   rainstick, ocean drum, wind chimes

For Developers

Want to regenerate the samples yourself or tweak the presets?

uv sync                           # install dependencies
uv run python generate.py                # all instruments
uv run python generate.py piano sitar    # just specific ones
uv run python generate.py --patch        # update patch.json only (no audio regen)
uv run python generate_drums.py          # all drum kits

See opxy-preset-notes.md for detailed documentation on the OP-XY preset format — what we learned about loop behavior, region fields, envelope settings, and more.

See CHANGELOG.md for what's changed.

Built with PyTheory by Kenneth Reitz.

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