nRF24 audio quality

Question

I'm planning wireless conference system. This needs some condition as under simultaneously use 5ch of wireless bi-directional connection through whole system. Each wireless module use just one RF ch. 
 Each wireless channel use audio streaming(one direction) and small data transmission(bi-direction) 
 Is that possible with nRF24 ?

ovrebekk · Accepted Answer

Hi 
 Audio latency is not the issue, unless you run very aggressive sound compression that requires a lot of buffering etc. 
 The issue, whether you use the nRF24 or nRF52, is that you don't have a lot of throughput overhead if you want to send high quality audio. 
 Uncompressed 32KHz, 16-bit, bidirectional sound requires a total data rate of 1024kbps. While this is technically possible in the 2Mbps proprietary mode in the nRF24 or nRF52 it won't leave you a lot of overhead for retransmissions, which means that packet loss will be very noticeable on the received audio since you don't have time to retransmit lost packets. 
 Bidirectional 48KHz, 24-bit uncompressed is definitely not possible. The absolute maximum throughput in the 2Mbps mode is around 1700-1800kbps, and when pushing this much data you would have zero overhead for retransmissions, and you would have to expect significant packet loss in a noisy environment such as an office. 
 Do you plan to have a single Nordic device in the central node communicating with all 5 devices, or multiple Nordic devices? 
 If the same device does everything you have to divide the total available bandwidth by 5. 
 Best regards Torbjørn

nRF24 audio quality

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