Let's say that I would like to transmit & receive digital compressed audio (2400bps for example) in an indoor environment
Can anyone recommend what would be the best choice regarding the modulation type and frequency band of the transceiver, in order to achieve the best link?
Look at what is in the market and decide what means "best" for you in the specifications; if stereo, single link, bidirectional, intercom, band, range, power, voltage supply, size, inputs/outputs, kit or assembled...
"Best needs better specs" on all the interfaces including possible interferences and protocols and expectations of performance ... but could easily go on AM, FM modulation