asterisk users - Nov 2019 - Is it possible to record 2-4 party call audio in stereo quality as opposed to mono?

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.

Some background..
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?

Any suggestions?
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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.


Regards,


Antony.

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

                                                   Please reply to the list;
                                                         please *don't* CC
me.

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!

Da

-----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.


Regards,


Antony.

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

                                                   Please reply to the list;
                                                         please *don't* CC
me.

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