TestAudioUnit AudioUnitInitialize failed,so no voice can heard!!!!!!

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What steps will reproduce the problem?
1.open the TestAudioUnit project, then run it
2.click prepare button.
3.found error:

What is the expected output? What do you see instead?
i have compile the project successful, but when i use testAudioUnit,no voice i 
can heard!

the console output is: testAudioUnit[1339:707] 14:19:49.307 <0x3e756d98> 
AURemoteIO::Initialize failed: 'init' (enable 3, outf< 1 ch,   8000 Hz, Int16> 
inf< 1 ch,   8000 Hz, Int16>)
***ERROR: function: "_tdav_audiounit_handle_signal_xxx_prepared()" 
file: 
"/Users/koujun/Documents/VOIP/mydoubs/iPhone/idoubs/branches/2.0/ios-ngn-stack/.
./../../../../doubango/branches/2.0/doubango/tinyDAV/src/audio/coreaudio/tdav_au
diounit.c" 
line: "100" 
MSG: AudioUnitInitialize failed with status =1768843636

What version of the product or source code revision are you using? On what
operating system?
ios 5.1 in ipod touch4

Please provide any additional information below.

Original issue reported on code.google.com by joinny...@gmail.com on 26 Oct 2012 at 6:47

Attachments:

[屏幕快照 2012-10-26 下午2.46.37.png](https://storage.googleapis.com/google-code-attachments/idoubs/issue-129/comment-0/屏幕快照 2012-10-26 下午2.46.37.png)

JiaNemo / idoubs

TestAudioUnit AudioUnitInitialize failed,so no voice can heard!!!!!! #129