v0.8.0

Spatial audio

The main highlight of this release: Kira now supports 3D positional audio! This is a simple implementation of 3D audio that only support volume attenuation based on distance and panning based on direction. Doppler effect and distance-based filtering and reverb are not supported yet.

This is meant to be an MVP of positional audio. Please give it a try and let me know what improvements you'd like to see so I can gauge what expansions to this API should look like.

Modulators

Modulators are globally available streams of values that parameters like volume and playback rate can be linked to. These are useful for controlling multiple parameters with one value and using more complex modulations, like LFOs.

For anyone who's made implementations of traits in previous versions of Kira, keep in mind that Tweener was renamed to Parameter, and now Tweener is the name of a modulator implementation that comes with Kira.

New effects

Two new effects were added: compressor and EQ filter. The compressor adjusts the volume of audio to make louder parts quieter. An EQ filter a single band of a parametric EQ useful for adjusting the volume of frequencies of sound.

Playback region/loop region settings

The start_position setting for static and streaming sounds has been replaced with a playback_region setting which lets you specify an end position for the sound as well as a start position. The loop_behavior setting has been replaced
with loop_region, which lets you specify an end point for the loop. You can now change the loop_region after the sound is created using the
set_loop_region function on the sound's handle.

Other changes

• StaticSoundData::frames is now an Arc[Frame] instead of Arc<Vec<Frame>>
• Exposed the Decoder trait for streaming sounds
• Moved PlaybackState to the sound module
• Streaming sounds now support reverse playback
• Added TrackBuilder::with_effect
• Moved ClockSpeed to the clock module
• Moved PlaybackRate to the sound module