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    <p>Instead of prerecording WAV files and embedding them in your application, you can instead generate the split-channel WAV audio in memory from code, and then either save it as a WAV file that you would play with SoundPool, or play the audio directly using AudioTrack (I'd recommend the latter).</p> <p>The audio itself is just an array of (usually) 2-byte integers. With stereo, the left and right samples are interleaved throughout the array (so sample[0] is the first L sample, sample[1] is the first R sample, sample[2] is the second L sample etc.). So when your app starts up, you would create an array however long you need (with CD-quality audio, your array will need 88200 elements for each second of audio) then fill the samples with calculated values for your tone, then pass the array to AudioTrack for playing.</p> <p>Or you would save the audio as a WAV file and play it with SoundPool (which might actually be better from a memory footprint standpoint). The WAV format is very simple to write (reading is more complicated): just a 44-byte header with various properties, and then the audio data itself.</p> <p>I think I've answered a similar android question before, so I'm going to go see if I have some basic code for doing this.</p> <p>Not me, but some good code for reading and writing WAV files in java:</p> <p><a href="http://computermusicblog.com/blog/2008/08/29/reading-and-writing-wav-files-in-java" rel="nofollow">http://computermusicblog.com/blog/2008/08/29/reading-and-writing-wav-files-in-java</a></p>
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    1. USMusiGenesis
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