libasound2-plugins 1.0.24-0ubuntu6 (amd64 binary) in ubuntu precise

 This package contains plugins for the ALSA library that are
 not included in the main libasound2 package.
 .
 The following plugins are included, among other:
   - jack: play or capture via JACK
   - oss: run native ALSA apps on OSS drivers
   - pulse: play or capture via Pulse Audio
   - samplerate and speexrate: rate converters
   - upmix and vdownmix: convert from/to 2 and 4/6 channel streams
 .
 ALSA is the Advanced Linux Sound Architecture.