Super Audio Upgrade!

[bjornbytes]

Summary of changes:

• Enables Steam Audio by default in all LÖVR builds!
• Upgrades Steam Audio from version 2 to version 4.8 (Upgrade phonon to v4 #474)
• Add a new AudioMesh object, with dynamic transform (Add dynamic audio geometry support #866, lovr.audio.setGeometry with phonon is kinda slow #406)
• Audio meshes can have per-triangle audio materials (Per-triangle AudioMaterials #409).
• Adds lovr.audio.setHRTF to enable a custom HRTF. Binaural spatialization will only work if an HRTF has been set, otherwise the spatializer will fall back to simple panning.
• Most changes to sources are queued up and committed when lovr.audio.update is called (lovr.run does it for you after lovr.update) (Atomic Audio Functions #892).
• Add t.audio.debug to get log messages from Steam Audio and miniaudio.
• Audio thread is lock-free, less risk of stalling/underruns
• Lots of extra conf.lua options to customize reverb
• Heavy reverb computation is performed on a background thread asynchronously.
• Replace Source:setEffectEnabled with individual setters, that allow extra customization:
  • Source:setAbsorption -- sources can have custom air absorption coefficients
  • Source:setCone -- uses more intuitive angle cone, replaces setDirectivity
  • Source:setFalloff -- has configurable min distance and volume limit
  • Source:setOcclusion -- can configure number of rays used for occlusion/transmission
  • Source:setReverb -- can set reverb volume and choose listener-centric vs. source-centric reverb mode
  • Source:setSpatialization -- can blend between spatialized and non-spatialized audio

TODO:

• Add support for ambisonic sound playback with binaural spatialization and rotation

[jeveloper]

@bjornbytes Bjorn, as a sound designer/artist/long time coder , I am applauding for your hard work and I would like to work on using your audio system in the 2026 release and write a few articles about it along the way.