Mix two mono streams into one stereo.

Mix two mono streams into one stereo.

[Juan Zapatero]

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I need some help with this. I have written a VoIP application which
captures audio from a microphone input, and plays audio coming through
the network to de audio output.

This application is intended to run on a system with a sound-card that
has only one stereo output, and two different audio streams have to be
played both at the same time through this stereo output. So I need to
mix both mono streams into one stereo stream using ALSA Api.

How is this possible?

Juan Zapatero.


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Re: Mix two mono streams into one stereo.

[Lee Revell]

On Tue, 2006-03-07 at 13:18 +0000, Juan Zapatero wrote:
> I need some help with this. I have written a VoIP application which
> captures audio from a microphone input, and plays audio coming through
> the network to de audio output.
> 
> This application is intended to run on a system with a sound-card that
> has only one stereo output, and two different audio streams have to be
> played both at the same time through this stereo output. So I need to
> mix both mono streams into one stereo stream using ALSA Api.
> 
> How is this possible?

Just use JACK, this exposes the two output channels as independent
ports, and write your app as a JACK client (or multiple clients)

Lee



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