[first checked in
waterson@maubi.net**20080319172526] 
[test file
waterson@maubi.net**20080319172559] 
[add some documentation
waterson@maubi.net**20080319174429] 
[fiddle around, trying to get sample rate conversion to work
waterson@maubi.net**20080404074259] 
[notes
waterson@maubi.net**20080404075616]