The April Acid Pattern is from 303Forever (http://soundcloud.com/303forever)
http://soundcloud.com/303forever/aprilacidpattern-303forever
The pattern can then be programmed into your tb303 or x0x box to create a new track.
The pattern could be programmed into your vst such as ABL or Phoscoyn to create a new track.
Transcribe the pattern to midi and send it to your favourite synth to create a new track.
Grab the audio file and rework the audio into a new track
Then post your finished track or jam into the acid pattern group
http://soundcloud.com/groups/the-acid-question
I’ve had two takes on the pattern.
April Acid Pattern the second bashing by DyLABs
You can grab this empty pattern sheet from here
http://bit.ly/a9bafZ
There is a noisepage archive for all the old patterns.
http://noisepages.com/groups/acid-pattern-group/forum/