Three automated proofs: (1) saveAudio (post-repair: delegates
to the canonical io/wav.encodeWav and returns the Blob) writes
a 1 s 440 Hz tone that loadFile reloads within the 16-bit
quantization bound — original and reloaded waveforms are overlaid below;
(2) example()/exampleBuffer() exercise the AudioCache against a
local fixture (fixtures/trumpet.ogg — WAV bytes; the
remote sample registry stays unverified, see barrel note) proving
entries+1 after first load and a zero-network cache hit on the second;
(3) fileio.stream() (post-repair docs: chunked reader, NOT
streaming frame-generator semantics) splits a 3 s tone into exactly ⌈N/2048⌉ lossless
blocks. Chunk math node-verified 2026-07-02 via injected decoder (65 blocks,
bitwise re-concat). Saving triggers one real download of
pleco-tone-440.wav — that side effect is the point.