loteran/DS5Dongle v0.5.0 on GitHub

Fixes

Controller input lag — the haptics DSP's 48kHz→3kHz conversion ran through WDL_Resampler's polyphase filter on every audio_loop() call on core0. Under sustained real audio (e.g. the PC-side auto-haptics PipeWire loopback actually playing game sound), this delayed how often the main loop serviced cyw43_arch_poll(), felt as Bluetooth controller input lag. Replaced with a fixed 1-in-16 decimation for this stage — the haptics channel is felt, not heard, so resampler interpolation quality wasn't buying anything. Stays single-core, no architecture change.
ds5-haptics-loopback.service hardening: self-heals when the DualSense audio card drops to the off profile, drives the actual haptic actuators (AUX2/AUX3) instead of the pad's headphone jack, and only captures the game/output channels the user actually wants (everything except ASM's Chat and Media channels, with a default-sink fallback when ASM isn't installed).

If you use the PC-side auto-haptics loopback, auto_haptics_enable must be set to 0 (Off / pass-through) in the device config — Mix/Replace modes derive their signal from the pad's own speaker channels, not from what the loopback service feeds into the actuator channels.