[pulseaudio-discuss] arecord from monitor and sink

[Amar Akshat]

Pardon  my ignorance, however I do not fully understand, what is meant
by mixing the two recordings ? Is it something Pulseaudio can do ? If
you, could you guide me to the documentation regarding it.

Also, in case of multiple sinks as one, or multiple sources as one,
what is the best way to do it ? I think I posted this question once in
this forum long back, and the result was we cant configure one virtual
sound card to have multiple real sources.

Thanks,
Amar/

On Thu, Nov 1, 2012 at 6:30 PM, Arun Raghavan
<arun.raghavan at collabora.co.uk> wrote:
> On Thu, 2012-11-01 at 17:04 +0900, Amar Akshat wrote:
>> Hi,
>>
>> As we know, pulse recognizes every sound card's source as a source and
>> a monitor device. We use monitor device to record any activity on that
>> sound card's source.
>>
>> However, for a scenario like a sound card used for making a phone
>> call, and we wish to record the entire ongoing conversation. In that
>> case we need to capture both the streams, the source and sink. At
>> first I thought, If I set PULSE_SOURCE as monitor and PULSE_SINK as
>> the sink of the sound card, and then do
>> arecord -D default > x.wav,
>>
>> both channels would be recorded. However that is not happening. Kindly
>> suggest what is the best way to do it using pulse ?
>
> You basically need to capture from the mic source as well as the monitor
> source and then mix it. We don't have the ability to combine the two (we
> do have module-combine-sink that lets you present several sinks as one),
> so you'll either need to make a module-combine-source or just do mixing
> yourself.
>
> -- Arun
>
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-- 

Thank you...

Amar Akshat (アマール)

 "Walking on water and developing software from a specification are
easy if both are frozen."