Could not start Audio Queue Error starting recording - iphone

Question

CFStringRef state;
UInt32 propertySize = sizeof(CFStringRef);
// AudioSessionInitialize(NULL, NULL, NULL, NULL);
AudioSessionGetProperty(kAudioSessionProperty_AudioRoute, &propertySize, &state);
if(CFStringGetLength(state) == 0)
// if(state == 0)
{ //SILENT
NSLog(#"Silent switch is on");
// create vibrate
// AudioServicesPlaySystemSound(kSystemSoundID_Vibrate);
UInt32 audioCategory = kAudioSessionCategory_MediaPlayback;
AudioSessionSetProperty( kAudioSessionProperty_AudioCategory, sizeof(UInt32), &audioCategory);
}
else { //NOT SILENT
NSLog(#"Silent switch is off");
}
where ever i use Above code i am able to play sound file in Silent mode
but after playing recorded sound file in silent mode when i try to record voice again
I get an error
LIke
2010-12-08 13:29:56.710 VoiceRecorder[382:307] -66681
Could not start Audio Queue
Error starting recording
here is the code
// file url
[self setupAudioFormat:&recordState.dataFormat];
CFURLRef fileURL = CFURLCreateFromFileSystemRepresentation(NULL, (const UInt8 *) [filePath UTF8String], [filePath length], NO);
// recordState.currentPacket = 0;
// new input queue
OSStatus status;
status = AudioQueueNewInput(&recordState.dataFormat, HandleInputBuffer, &recordState, CFRunLoopGetCurrent(),kCFRunLoopCommonModes, 0, &recordState.queue);
if (status) {CFRelease(fileURL); printf("Could not establish new queue\n"); return NO;}
// create new audio file
status = AudioFileCreateWithURL(fileURL, kAudioFileAIFFType, &recordState.dataFormat, kAudioFileFlags_EraseFile, &recordState.audioFile); CFRelease(fileURL); // thanks august joki
if (status) {printf("Could not create file to record audio\n"); return NO;}
// figure out the buffer size
DeriveBufferSize(recordState.queue, recordState.dataFormat, 0.5, &recordState.bufferByteSize); // allocate those buffers and enqueue them
for(int i = 0; i < NUM_BUFFERS; i++)
{
status = AudioQueueAllocateBuffer(recordState.queue, recordState.bufferByteSize, &recordState.buffers[i]);
if (status) {printf("Error allocating buffer %d\n", i); return NO;}
status = AudioQueueEnqueueBuffer(recordState.queue, recordState.buffers[i], 0, NULL);
if (status) {printf("Error enqueuing buffer %d\n", i); return NO;}
} // enable metering
UInt32 enableMetering = YES;
status = AudioQueueSetProperty(recordState.queue, kAudioQueueProperty_EnableLevelMetering, &enableMetering,sizeof(enableMetering));
if (status) {printf("Could not enable metering\n"); return NO;}
// start recording
status = AudioQueueStart(recordState.queue, NULL); // status = 0; NSLog(#"%d",status);
if (status) {printf("Could not start Audio Queue\n"); return NO;}
recordState.currentPacket = 0;
recordState.recording = YES;
return YES;
i get an error here

Answer 1

I was facing similar problem in iOS 7.1. Add following in AppDelegate's didFinishLaunchingWithOptions :
AVAudioSession * audioSession = [AVAudioSession sharedInstance];
[audioSession setCategory:AVAudioSessionCategoryPlayAndRecord error: nil];
[audioSession setActive:YES error: nil];
EDIT : Above code is working for me