Feature Request - fade in/out of sounds

[dcvdiego]

This repo has been amazing and really easy to implement. However some of the sound packs' sounds abruptly start or stop. Could we add a config for fade in/out times to make it a bit more seamless? Thanks!

[garysheng]

Fade in/out would need per-backend work — macOS afplay doesn't have a volume ramp flag, but ffplay does. Linux priority chain is mixed. A cleaner path might be to pre-process pack sounds with fade baked in, rather than doing it in the player. Config shape: fade_ms: 100. Left open as a feature request.