Audio Formats and Quality

Format

Extension

Quality

Comments

AAC Audio
Secure AAC

.m4a

.m4p

96 - 320 Kbps Stereo

AAC encoded MPEG-4 audio. Compatible with iTunes and the iPod.

Real Audio 10

Secure RealAudio

.ra
.rax

32 - 320 Kbps Stereo

Highest quality native format from RealNetworks.

Real Audio Lossless

.ra

705 Kbps Stereo

Loses no data, all information in the original file or track is preserved.

Rhapsody MP3

.mp3

256 Kbps

MPEG Layer 3 Audio. 4.1 kHz sampling rate, true stereo. Compatible with iTunes and the iPod.

MP3

.mp3

32 -320 Kbps Stereo (Default: 128 Kbps)

MPEG Layer 3 Audio. Compatible with iTunes and the iPod.

WAV Audio

.wav

1411 Kbps Stereo

Raw, uncompressed files.

WMA Audio

.wma

64-192 Kbps Stereo

Windows Media audio file: Microsoft Windows proprietary audio format.