[keen101]

<R85> Any decorations that involve broadcasting a signal to/from the ROBOT, such as a remote , cameras, must be cleared with FIRST Engineering prior to the event and tested for communications interference at the venue. Such devices if reviewed and approved, are exclude from <R64>. Note that 900 MHz camera systems will not be approved, and are not permitted.

I would assume... based on this rule, that as long as it's not near the 900 MHz range.. it will be fine, and will not interfere with the radios.

..as for the sound system... as long as it's only broadcasting sound, and not playing loud music in the PITS, then I think it's OK. But, you may wan't to clear it with FIRST Engineering.