Credits

The backing band plays recorded instruments. Somebody set up microphones for every one of them and gave the results away; this page says who, which is both a licence obligation and the least they are owed.

The drum kit

Kick, snare, cross-stick, hi-hat and ride come from the Versilian Community Sample Library by Versilian Studios LLC, released under CC0 1.0 — public domain. No credit is required for these. It is here anyway.

The upright bass and the piano

Sampled from FluidR3_GM by Frank Wen, by way of Benjamin Gleitzman’s pre-rendered MIDI.js soundfonts, under Creative Commons Attribution 3.0. This credit is the attribution that licence asks for.

What was done to them

The drums were mixed down to mono, trimmed to their attack, cut short with a fade and levelled. The bass and piano are sampled every few semitones and pitch-shifted in between. The room you hear them in is not a recording of anywhere — it is noise dying away, made up on the spot by your browser. The whole process is one script in the repository, so any of this can be checked or changed.

The app itself

Good Ears is designed and built by Chris Rouxel, and it is not open source: the software, the reader and the weights it was trained with belong to Christopher Rouxel. Every sound above was chosen because its licence allows that — public domain, or attribution, which this page is. See the terms and the privacy page, which is the one that matters: your microphone never leaves your device.