For people who like to copy and paste other people’s solutions without researching the problem in depth, this entry is for you (since I don’t go into depth).
I was noticing my iPhone game framerate being really jerky when playing music that I encoded using IMA4 format, so I changed it to LEI8. The file format is somewhat big, being lossless, but the tradeoff is that I hardly notice any jerkiness now.
In short, I was previously running this to convert my files before:
/usr/bin/afconvert -f caff -d ima4 Source.mp3 Target.caf
and now I’m doing this
/usr/bin/afconvert -f caff -d LEI8 Source.mp3 Target.caf
I don’t notice any sound quality degradation either. I also tried LEI16 but it wasn’t worth the doubled size for no noticeable quality gain (Your Mileage May Vary).
