A sound FX had no way to place a sound in the stereo field. The new
Pan node does that on a voice, a bus and a track alike.
- One input, Pan from -1 (left) to 1 (right), 0 by default. Behind it
is a StereoPannerNode. A typed-in 0 leaves the node out, a pan fed
from a parameter stays at any value.
- It moves with Set sound FX parameters, and an Envelope can move it
in an instrument.
- As the issue decided, no pan from the position in Play sound and no
width control for stereo sounds.
Finding: the issue and the plan said a stereo sound gets a balance.
Web Audio pans stereo differently: the side it goes to stays and the
other side moves over into it. The node description and the wiki say
so, the e2e check measures it.
Tests:
- Unit soundfx 46 (1 new), sound-library 97 (1 new), green.
- Counter-check: a pan from a parameter at 0 left out, 1 test red.
- e2e 34 (melektaus-atx): ALL PASSED, 77 checks (1 new). Chrome
offline, a mono sine at 0.5 gives 0.5 / 0 at -1 and 0.354 / 0.354
at 0. A stereo one at 0.5 panned 0.5 gives 0.354 / 0.854.
- The gate runs once on the last commit of this series.
Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
adminandClaude Opus 5.5
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