[asterisk-users] Is it possible to record 2-4 party call audio in stereo quality as opposed to mono?

Dan Cropp dan at amtelco.com
Sun Nov 3 17:05:47 CST 2019

Thank you Anthony

I was not involved in the entire conference call with the customer.
They plan to send the recordings to another company to anaylze the operators behavior.
I believe you are correct about them left channel of the recording to be the operator and the right channel to be the 1-3 other participants (from ConfBridge).  

I will give the MixMonitor a try.

Have a great day!


-----Original Message-----
From: asterisk-users <asterisk-users-bounces at lists.digium.com> On Behalf Of Antony Stone
Sent: Friday, November 1, 2019 5:41 PM
To: Asterisk Users Mailing List - Non-Commercial Discussion <asterisk-users at lists.digium.com>
Subject: Re: [asterisk-users] Is it possible to record 2-4 party call audio in stereo quality as opposed to mono?

On Friday 01 November 2019 at 22:29:28, Dan Cropp wrote:

> We have a customer who wants us to record anywhere from 2-4 
> participants on a call in stereo (as opposed to mono) quality audio.

I'm assuming you mean you want to get one stereo recording for each participant, where the left channel is the participant and the right channel is the rest of the conference?

If that's not correct, what do you want the two channels of a stero recording to contain?

> We are using asterisk 16.6.1
> We are also currently using AMI/AsyncAGI and ConfBridge to bring the 
> parties together.  I believe recording in the various file formats 
> (based on extension), it's always recording in mono quality.
> My one thought is to transition to using ARI Bridge (instead of 
> ConfBridge) and streamed audio using ExternalMedia. Then have a media 
> server capture the external media packets, stripping the payload 
> information and write directly to a file. Would that audio be of ulaw stereo or mono?

Suppose it *is* stereo - what would you expect the two channels to contain?  
It sounds like you want one single stereo recording of a conference with multiple participants.  Are they all using stereo telephones and generating two-channel audio into the conference - or what??

> Any suggestions?

How about a simple MixMonitor with btr options on each participant who dials in, before they get placed into the conference?  Then the t channel should be the participant and the r channel should be the rest of the conference.



What do you call a dinosaur with only one eye?  A Doyouthinkesaurus.

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