Audio mixer

The audio mixer block mixes multiple audio streams into one. Block mixes the streams regardless of their format, converting if necessary. All input streams will be synchronized.

Use AudioMixerSettings class to set the custom output format.

Block info

Name: AudioMixerBlock.

Pin direction	Media type	Pins count
Input	Uncompressed audio	1
Output	Uncompressed audio	1

The sample pipeline

VirtualAudioSourceBlock → Input1.AudioMixerBlock → VorbisEncoderBlock → AudioRendererBlock VirtualAudioSourceBlock → Input2.AudioMixerBlock

Sample code

var pipeline = new MediaBlocksPipeline(false);

var audioSource1Block = new VirtualAudioSourceBlock(new VirtualAudioSourceSettings());
var audioSource2Block = new VirtualAudioSourceBlock(new VirtualAudioSourceSettings());

var audioMixerBlock = new AudioMixerBlock(new AudioMixerSettings());

pipeline.Connect(audioSource1Block.Output, audioMixerBlock.CreateNewInput());
pipeline.Connect(audioSource2Block.Output, audioMixerBlock.CreateNewInput());

var vorbisEncoderBlock = new VorbisEncoderBlock(new VorbisEncoderSettings());
pipeline.Connect(audioMixerBlock.Output, vorbisEncoderBlock.Input);

var oggSinkBlock = new OGGSinkBlock(new OGGSinkSettings(@"output.ogg"));
pipeline.Connect(vorbisEncoderBlock.Output, oggSinkBlock.CreateNewInput(MediaBlockPadMediaType.Audio));     

await pipeline.StartAsync();

Platforms

Windows, macOS, Linux, iOS, Android.