Apple iPod touch iOS 2.1 - Manual (Page 107)

Appendix A Troubleshooting 107
Sound, Music, and Video
No Sound
Unplug and reconnect the headset. Make sure the connector is pushed in all the Â
way.
Make sure the volume isn’t turned down all the way.
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Music on iPod touch might be paused. From the Home screen tap Music, tap Now Â
Playing, then tap .
Check to see if a volume limit is set. From the Home screen choose Settings > iPod
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> Volume Limit. For more information, see “Music” on page 97.
Make sure you are using the latest version of iTunes (go to
 www.apple.com/itunes).
If you are using the optional dock’s line out port, make sure your external speakers Â
or stereo are turned on and working properly.
Song, Video, or Other Items Won’t Play
The song may have been encoded in a format that iPod touch doesn’t support. The
following audio file formats are supported by iPod touch. These include formats for
audiobooks and podcasting:
AAC (M4A, M4B, M4P, up to 320 Kbps) Â
Apple Lossless (a high-quality compressed format) Â
MP3 (up to 320 Kbps) Â
MP3 Variable Bit Rate (VBR) Â
WAV Â
AA (audible.com spoken word, formats 2, 3, and 4) Â
AAX (audible.com spoken word, AudibleEnhanced format) Â
AIFF Â
The following video file formats are supported by iPod touch:
H.264 (Baseline Profile Level 3.0) Â
MPEG-4 (Simple Profile) Â
A song encoded using Apple Lossless format has full CD-quality sound, but takes up
only about half as much space as a song encoded using AIFF or WAV format. The same
song encoded in AAC or MP3 format takes up even less space. When you import music
from a CD using iTunes, it is converted to AAC format by default.
Using iTunes for Windows, you can convert nonprotected WMA files to AAC or MP3
format. This can be useful if you have a library of music encoded in WMA format.
iPod touch doesn’t support WMA, MPEG Layer 1, MPEG Layer 2 audio files, or audible.
com format 1.