MP3 compatability

**mobichan** · 25th October 2012, 03:46 PM

I am running into problems playing some mp3 files that are coming from a contract musician. Is there a specific mp3 setting that is NOT supported in MMF?

**Nifflas** · 25th October 2012, 03:56 PM

Don't use proprietary nonsense like mp3 files, use ogg vorbis as there's no license required for supporting it.

**mobichan** · 25th October 2012, 05:07 PM

I would use ogg, but it bloats my app by quite a bit. Unfortunately, mp3 is the native format.

**DistantJ** · 25th October 2012, 05:40 PM

I believe the MP3 license goes straight through Apple anyway, since it uses their decoder on the iPhone.

Does it stutter on the PC or on the device as well? I've found that certain bitrates stutter when being decoded on PC but work fine on the actual iOS device. Otherwise, try changing the bitrate, open it in another piece of software and then re-save/re-render it. I find a good way is to import it into GarageBand and then export it as a new MP3, to ensure it's fully compatible with iOS.

**mobichan** · 25th October 2012, 06:27 PM

This problem is on the PC (I haven't exported it yet to iOS with this track being played). I actually get no sound at all from this file. In the file selector/player, it immediately stops when I press play. But I wondered if anyone knew what options might not be supported so I can avoid those in the future.

**DistantJ** · 25th October 2012, 06:41 PM

Ohh, I've had that with a few certain formats of MP3 actually. Didn't try them on iOS. Try exporting it and see if it works because MMF2's encoder is different to the iOS one.

**Anders** · 26th October 2012, 12:57 PM

Just a note:
OGG sounds gets converted to WAV since we don't have support for the format in the iOS runtime.

MP3 and WAV are the only formats supported. You can gain a lot of performance and use less space if you lower the quality of your WAV sounds a bit though with nearly no audible difference.

**DTownTony** · 26th October 2012, 02:20 PM

Originally Posted by Andos

You can gain a lot of performance and use less space if you lower the quality of your WAV sounds a bit though with nearly no audible difference.

+ONE MILLION on this. I just removed almost all instances of lag in Pocket Ninjas by doing this and can't tell any difference in the sound.

**mobichan** · 26th October 2012, 03:42 PM

Yea. The wav files were about 7MB on disk on the PC side, but the app bloated to almost 36MB. When I switched to mp3, the size of the app dropped to about 7MB.

It seems like the sound I had issues with works on device, but still doesn't work on the PC. I'll try playing with compression settings to see if I can find the sweet spot. :/