[amsat-bb] Amateur Radio BIRDS CubeSat Constellation

[skristof at etczone.com]

Saw this in today's AMSAT newsletter: 

" A particularly interesting mission of BIRDS project is the SNG mission
that
exchanges music via a digi-singer. It is an outreach-oriented mission.
First,
music in MIDI format is uploaded from ground. Then the MIDI file is
processed
on-board using a vocal synthesizer. Finally, the processed music is sent
back
to Earth using UHF antenna as voice FM data. " 

Isn't music transmission prohibited in the United States amateur radio
service? 

Steve AI9IN