I demand BangleJS3!

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fanoush in reply to @Ganblejs

Although one could argue it's better to connect some bluetooth headset to the bangle for audio interfacing. Counter to that, you might not always want to have a headset on you.

Just noticed this comment. Unfortunately Bluetooth headsets are so far all classic Bluetooth which nrf52840 does not support. There is LE audio standard coming but it still might take some time to get widely used and unfortunately nrf52840 may be too slow to support this as per https://devzone.nordicsemi.com/f/nordic-q-a/72791/bluetooth-5-2-support-for-nrf52840/299994#299994

The LC in LC3 codec name means low complexity so decoding should be OK but we are talking about encoding here if we want to send audio to the headset.

Some CPU numbers for encoding are here https://devzone.nordicsemi.com/f/nordic-q-a/93689/nrf5340-lc3-decoder-question - 48% CPU for encoding stereo stream but that is on 128MHz Cortex M33 nRF5340 so it will be at least twice as much for 64MHz 52840.

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HopeToBeUseful1day in reply to @fanoush

Does it mean nrf5340 would drain the battery when working with audio?

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halemmerich in reply to @HopeToBeUseful1day

It sounds like if it is possible at all CPU-wise it will be awfully close. Probably too close for someone (Nordic) to attempt to implement newer bluetooth LE codecs on these chipsets. If it somehow actually works, storage would be the next big problem. 8MB flash is not much to store audio samples.

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