AudioChannelCombine

AudioChannelCombine[{audio1, audio2, ...}] creates a multichannel audio object by combining the sequence of channels in audioi.

Examples

Combine mono audio into stereo:

mono = ExampleData[{"Audio", "Bird"}];
stereo = AudioChannelCombine[{mono, AudioDelay[mono, Quantity[0.05, "Seconds"]]}];

Please visit the official Wolfram Language Reference for more details.