android 支持的声音格式详解

或许你和我一样，都曾为android头痛的声音格式烦恼，虽然支持的格式那么多，声音大小，压缩格式，无一不影响着它的正常播放，

What Audio Formats Does Android Support? 
Well, there’s support on paper, there’s support in the emulator, and there’s support on the actual devices. On paper, Android supports the following file types (this is subject to change with new releases): 
    * WAV (PCM uncompressed) 
    * AAC (Apple iPod format, unprotected) 
    * MP3 (MPEG-3) 
    * WMA (Windows media audio) 
    * AMR (Speech codec)     * OGG (Ogg Vorbis)* 
    * MIDI (Instruments) 
In reality, I’ve found that only the OGG, WAV, and MP3 formats work  well  in  the  emulator,  and  thus  those  are  the  only  ones that I can recommend for application development. Android’s native audio format appears to be 44.1kHz 16-bit stereo. How- ever, since WAV files at that rate are huge, you should just stick to OGG or MP3 files (mono for voice or stereo for music). OGG files seem to work best for short clips like game sound effects. 
Stay  away  from  unusual  rates  like  8kHz  because  the  resam- pling artifacts make those rates sound terrible. Use 11kHz, 22kHz, or  44.1kHz  sampling  rates  for  the  best  results.  Remember  that although  the  phone  may  have  a  tiny  speaker,  many  of  your users are going to be plugging in headphones (like an iPod), so you want your audio to be high quality.