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Re: what does kAudioQueueErr_CannotStart mean?
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Re: what does kAudioQueueErr_CannotStart mean?

You need to be using AudioSession
You need to establish a category for yourself that tells the audio system that you want to have audio input 
AudioSession is defined in <AudioToolbox/AudioServices.h>

You also might want to look at <AVFoundation/AVAudioSession.h>
- it is a wrapper around audio session, and is a bit easier to use I think

On Dec 8, 2009, at 6:32 AM, feng ye wrote:

Hi:
I tried to compile an application based on the AudioQueue Service for iPhone, which playback and record simultaneously.
It works fine on iPhoneSimuSDK3.0. but get a kAudioQueueErr_CannotStart when call AudioQueueStart() in iPhoneOS3.0 in device. It seems that the the iPhone device doesn't permit starting rec queue after playback queue has been started.

via google, found many guys are struggling with this issue, but no proper solution.

Is there any restrict of the AudioQueue for Iphone device?Or maybe AudioQueue shouldn't be utilized for both playback and record simultaneously in iPhoneOs3.0?????

Is the problem exist in iphone 3.1 or later?(i have't upgrade my iphone yet)

Is there anybody found a way to solve or take a way around AudioQueue to develop a application with both audio playback and record?

Any feedback is welcome
Thanx!

-- 
BRs
Yefeng.t723h
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References: 
 >what does kAudioQueueErr_CannotStart mean? (From: feng ye <email@hidden>)



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