Use this thread to comment or ask any questions about the Bluetooth LE Audio Development Kit or the RoadTest in general.
Use this thread to comment or ask any questions about the Bluetooth LE Audio Development Kit or the RoadTest in general.
Dear Sir,
The road test seems interesting and can get solutions for many user to have group communication in an event activities.
I would like to have a out of box or connectivity of device to Bluetooth headset video or if it was no available please conduct webinar before completing this roadtest application date.
Thanking you
With regards
G. KARTHICK KUMAR REDDY.
In order to road test the BLE Audio Development Kit surely you need both a transmitter device and a receiver device, as only one dev board is provided. For example, a separate PC dongle could be provided (although not sure what is available), which receives the audio signal from PC via USB and then we can use this dev kit as the wireless BLE receiver device, or we use the dev kit as the transmitter device and then use a compatible wireless BLE speaker or headset, which is provided, as the receiver. Otherwise the only scenario where just one dev kit works is the configuration where an audio file is on SD card and one attaches a wired speaker to the dev kit, which then removes the BLE audio element. What do you propose.
A quick scan of the documentation suggests that this can still use the older Bluetooth Classic SBC in addition to the newer Bluetooth LE LC3. I'm no Bluetooth expect, so could be wrong about this.
I also find it odd that the DSP included on the board has stereo in but only mono out. I understand that the one possible application is to work as a single earbud from a pair. However, it seems odd that the use case of being a complete stereo Bluetooth headset is not possible.
Bluetooth LE Audio (and Auracast in particular) looks really interesting. I can't seems to find any devices that support it yet though. No dongles to transmit BLE Audio. No headphones ot receive it. Obviously this dev kit can be used to create either of those, but it would be nice to road test together with a commercial device to see if they work well together.
If anyone finds a commercial Bluetooth LE Audio product, maybe let us know in this thread.
I'm answering my own question, but it seems that this pair of Sennheiser headphones is the only BLE Audio device around at the moment. There are some similar named products like the RS-120-II that aren't Bluetooth LE.
https://audioxpress.com/news/first-bluetooth-le-audio-product-on-the-market-is-from-sennheiser-and-is-a-tv-transmitter-solution
https://www.sennheiser-hearing.com/en-UK/p/rs-120-w/
Whilst initially they look like some standard wireless headphones, they seem a bit niche and are marketed as "TV headphones". The idea is that the base pairs with multiple headphones so a few people can watch TV together. A good use case for Auracast, but they don't seem ideal for use as general purpose wireless headphones. If they had been, I might have been able to justify purchasing some to help with a road test. As they stand, not really.
for the mono out, do you mean this line in developer.nordicsemi.com/.../README.html
In the current version of the nRF5340 Audio application, the BIS mode offers only monophonic sound reproduction.
and stereo is supported via Connected Isochronous Stream (CIS) also mentioned in the same article developer.nordicsemi.com/.../README.html