I am adding a voice memo capability using AVAudioRecorder and I need to know the best settings for the recorder for recording voice.

Unfortunately, I know nothing about audio to the extent I am not even sure what terms to google for.

Currently, I am using the following which I copied from somewhere for testing purposes:

recorderSettingsDict=[[NSDictionary alloc] initWithObjectsAndKeys:[NSNumber numberWithInt:kAudioFormatAppleIMA4],AVFormatIDKey,
                        [NSNumber numberWithInt:44100.0],AVSampleRateKey,
                        [NSNumber numberWithInt: 2],AVNumberOfChannelsKey,
                        [NSNumber numberWithInt:16],AVLinearPCMBitDepthKey,
                        [NSNumber numberWithBool:NO],AVLinearPCMIsBigEndianKey,
                        [NSNumber numberWithBool:NO],AVLinearPCMIsFloatKey,
                        nil];

or:

defaultSettings =     {
    AVFormatIDKey = 1768775988;
    AVLinearPCMBitDepthKey = 16;
    AVLinearPCMIsBigEndianKey = 0;
    AVLinearPCMIsFloatKey = 0;
    AVNumberOfChannelsKey = 2;
    AVSampleRateKey = 44100;
};

This works but I don't know if it's optimal for voice in terms of quality, speed, file size etc.

The AVAudioRecorder Class Reference list many settings constants but I have no clue which ones to use for voice.

Baring that, if someone knows of a good "AudioFormats for Dummy's" resource I will take that as well. (Note:I've been through the Apple Docs and they assume a knowledge base in digital audio that I do not posses.)

iphone avaudiorecorder
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