iOS stops Web Audio when the screen locks, so live processing can't reach a
locked phone. For saved songs, EqRender renders the same chain as the live EQ
(5 bands -> level gain -> limiter) offline into a 32 kHz stereo WAV in OPFS
(eq-renders/<id>.wav, written by the OPFS worker's new write op), one song at a
time in the background. Playback then takes the picture from the saved video
(muted) and the sound from that copy in dual mode — plain media playback, so it
continues with the screen locked; live gains are zeroed so nothing is applied
twice. Copies are re-rendered when the EQ curve or a song's loudness changes
and removed when nothing needs applying.
- Level volume is now on by default everywhere (on iPhone it reaches saved
songs through these copies).
- New iPhone-only Settings -> Playback -> Live sound processing (off by
default): live Web Audio EQ/levelling for streamed songs, stops when locked.
- The EQ dialog works on iPhone and explains where the curve applies.
Server
- /api/download/:id answers Range with a strong ETag ("<id>.<gen>") and honours
If-Range; a stale partial gets the whole current file (streamed, so Bun does
not re-apply the Range itself). Uploads get the same treatment.
- GET /api/download/:id/prepare never blocks: ready {gen,size,sha256,etag,ext},
working (server still fetching), legacy (HEVC / too long / cache offline),
failed. Recently refused prepares are remembered for 10 minutes.
Browser
- The OPFS worker saves in 8 MiB ranges, writes at the byte offset, flushes
each chunk, retries each chunk 6 times with backoff (30 s idle timeout) and
keeps the .part plus a .part.json sidecar naming the server copy it belongs
to. A changed copy restarts cleanly; the finished file is hashed once and
checked against the server's SHA-256.
- SaveQueue remembers unfinished saves and resumes them on start, online,
return to the foreground and every 2 minutes while visible; one at a time.
- Downloads shows live MB progress, 'Preparing on server', 'Verifying', and
paused saves with Resume and Cancel (confirmed).
- listVideos ignores the sidecars; new listPartials/discardPartial helpers.
Verified in Chromium through a connection-dropping proxy: paused at 8 MiB,
auto-resumed after a reload from byte 8388608, final SHA-256 matched.
