Save a tone out as a WAV file, load it straight back in, and check that
nothing was lost — the original and reloaded waveforms are drawn on top of
each other below and should coincide. A sample cache proves repeat loads
skip the network entirely, and a chunked reader slices a long tone into
equal blocks without dropping a sample. The 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; (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.