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Bandwidth vs audio channels capacity ?



There is something crucial I cannot work out - the CC85xx bandwidth is 5 Mbit/s but the number of available channels is max 3 of 48kHz/16 bit which gives 3*768 kbit = 2,3 Mbit/s. I was sure that if we have so much bandwidth we actually can have 3 stereo channels - that gives 4,6 Mbit and 400 kbit is left for data channels with e.g. three slaves. But the documentation simply states three mono channels - is really the rest of the bandwidth not available for additional audio channels ? Where does the additional 50% of bandwidth goes to ? I was thinking of implementing High definition 24/96 audio but if only half the bandwidth is available for audio it will be rather difficult to implement.

 

  • Pawel,

    The left over bandwith is used for retransmission of lost audio samples. In a tough RF environment (which is the usual) you will always loose some of the data you are trying to transmit. This has to be retransmitted in order to play a continous audio stream on the sink side. In other words the 5 Mbps make sure that the PPW network is very robust. The more channels you are trying to support the less time you have to do retransmission of lost audio, so there's a trade off between additional channels and robustness of the network. However we are working to release firmware that support up to 4 audio channels in the network (and also support for up to 4 slaves).

    -Kristoffer