nikita-kun / webaudiosurroundtemplates

Simulate custom sound environments in a browser with stereo or multichannel output. Demo: https://nikita-kun.github.io/WebAudioSurroundTemplates

WebAudioSurroundTemplates

A simple browser class for playing customizable sound templates on multichannel equipment.

Sound templates are written in JSON. Templates reference URLs of audio files and specify playback logic. State transitions and sound events are modeled using random processes from the embedded jstat/jstat library.

Demo

Multichannel support (depending on a browser):

• Mono
• Stereo
• 4.0
• 5.1
• and other discrete sound configurations.

State transitions

• Time-scheduled state transitions (e.g. go to state X at 21:00, go to state Y or Z every 30 minutes)
• Random state transitions (sampling of state duration from a distribution)

webaudiosurroundtemplates's Issues

Chrome 79 and macOS 10.14.6: surround channels not playing

User Agent: Google Chrome Version 79.0.3945.130 (Official Build) (64-bit)
Operating System: macOS 10.14.6
WebAudioSurroundTemplates version: https://github.com/nikita-kun/WebAudioSurroundTemplates/tree/36ffa8fccc8dc521696bcfbbb2c50f8544a919c5
Template: channel_test

Channels playing: 1, 2, 3
Not installed, unknown: 4
Not playing: 5, 6

Log:

WebAudioTemplatePlayer Initializing. Channels: 6. Sample rate: 44100

player.context.destination -> AudioDestinationNode {
numberOfInputs: 1
numberOfOutputs: 0
channelCount: 6
channelCountMode: "explicit"
channelInterpretation: "speakers"
...}
player.merger -> ChannelMergerNode {
numberOfInputs: 6
numberOfOutputs: 1
channelCount: 1
channelCountMode: "explicit"
channelInterpretation: "speakers"
...}

Is this a problem with context.listener?
Examples work on Firefox 79 on the same OS, where the number of channels is also detected as 6.
player.context.listener in Chrome has many instantiated properties, while in Firefox it is empty.

Safari 12.1.2 and macOS 10.14.6: Fixed stereo

player.context.channelCount always has a value of 2.
maxChannelCount is 0.

AudioDestinationNode {maxChannelCount: 0, context: webkitAudioContext, numberOfInputs: 1, numberOfOutputs: 0, channelCount: 2, …}