Re: Record and playback at the same time
Re: Record and playback at the same time
- Subject: Re: Record and playback at the same time
- From: Kyle Sluder <email@hidden>
- Date: Fri, 13 Mar 2009 01:50:41 -0400
On Fri, Mar 13, 2009 at 1:05 AM, <email@hidden> wrote:
> I am trying to write an application that plays audio through the speaker and records at the same time. But what happens is that the recording also picks up what is being played. Is there any way to get the phone to cancel the echo, which it should know how to do, since the speakerphone mode of the phone has the same problem?
The typical way to do this is with a mix-minus. We do this in
hardware at the radio station I work at; The output is split, and one
of the outs is inverted and fed back in to the input. There is some
gain and gating applied, and a miniscule natural delay due to the
signal flowing through, so it works as intended.
--Kyle Sluder
_______________________________________________
Do not post admin requests to the list. They will be ignored.
Coreaudio-api mailing list (email@hidden)
Help/Unsubscribe/Update your Subscription:
This email sent to email@hidden