Move the ding renderer into pkg/service/ding so it can run both
at request time (from the new HandleDing handler) and offline
(from the existing scripts/gen-aftertouch-ding CLI, now a thin
wrapper around the same package).
- GET /media/aftertouch-ding.wav synthesises on first call,
caches the default-options bytes via sync.Once, and accepts
query-string overrides for every knob (pitch-{high,mid,low},
chirp-ms, gap-ms, attack-ms, release-ms, sample-rate, peak).
Invalid / out-of-range values silently fall back to defaults.
- Embedded WAV is gone from VCS — no 52 KB binary in the
repo, and tweaking the sound is now a query-param away rather
than a regenerate-and-commit cycle.
- Health-tab playback_test check is unchanged: the URL it
references (/media/aftertouch-ding.wav) keeps the same shape,
the handler just produces the bytes dynamically now.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
A 600 ms two-chirp sound derived from the braille S+T pair that
makes up the AfterTouch logo. Used as the test-playback target so
operators can confirm a freshly migrated speaker actually emits
audio without depending on TuneIn or any external service.
Mapping: dot rows → pitches (A5/E5/A4), dot columns → stereo
channels. S (dots 2,3,4) renders first, then T (dots 2,3,4,5) —
audibly "S plus one more voice".
Generator under scripts/gen-aftertouch-ding regenerates the file
on demand:
go run ./scripts/gen-aftertouch-ding \
-o pkg/service/handlers/static/media/aftertouch-ding.wav
22050 Hz stereo 16-bit PCM, ~52 KB. Picked up by the existing
static/media/* embed in handlers_media.go, so it's served at
GET /media/aftertouch-ding.wav once handlers can play it.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
Tobias GesellchenandClaude Opus 4.7