Best Audio Format for iPhone / iTouch

April 17, 2009 § Leave a comment

Based on Apple’s recommendation, the best audio formats on audio playback on iPhone and iTouch is 16-bit CAF for uncompressed audio, IMA/ADPCM audio (IMA4) for playing mulitple compressed sound simultaneously, ALAC (Apple Lossless), AAC, IMA4 or MP3 for single compress sound at a time.

It is worth to note that playing multiple Linear PCM and IMA/ADPCM (IMA4 audio) simultaneously will not cause any CPU resource concerns.

If you play sound shorter than 30 sec, then any format .caf, .aif, or .wav are good.

The simple way to convert an audio file to the preferred format in CAF file is using command line in Mac OS X.

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