Low latency audio link based on A2DP Bluetooth module?

Question

Hi,I'm trying to build a cheap digital audio link providing reasonablesound quality and working directly with the ALSA/jack-audio systemin a Linux embedded system.I've stated that there are available relatively cheap Bluetooth modulessupporting the A2DP.One example may be Rayson's BTM730: all I could find was the info, that it offers 16-bit CODEC.There is nothing about the sampling frequency and transmission latency.In my application it is essential, that the latency from the audio input inthe remote module to the jackd daemon in the embedded system is not higher than10ms.Is the BTM730 suitable for that purpose? Is the whole A2DP system suitable forthat?--TIA, WZab

Jack · Accepted Answer

than 10ms.that?Why are you asking here and not the Raysons' support?Bye Jack

wzab · Answer

ble for that?Well, the question about BTM730 is probably better suited for Rayson'ssupport,but question about all A2DP class modules is more general.Anyway I think that the response from people who have really usedthings like thesemay be more trustworthy...(Too many times I have received "too optimistic" answers from supportteams, andthen I had too learn that something simply doesn't work because it wasonly"supposed to work" but no one has tested it ;-) )

wzab · Answer

Well, i have found more info about A2DP

formatting link

(it uses lossy compression to transmit audio, which makes it useless for may application) and some remarks about BTM730 itself - it is based on BC05-MM firmware, which requires expensive proprietary tools (xIDE). So I don't think it is suitable for open source/open hardware project I'm trying to design :-(. I think, that I'll rather switch to Nordic nRF24Z1 with additional codec.

Low latency audio link based on A2DP Bluetooth module?

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