iw611/iw612 and LE audio

[pierluigi_p]

Dear NXP support,

according iw611/iw612 Release Notes for Linux (RN00104)

The firmware supports Bluetooth LE audio

Does this mean that LC3 codec is supported too ?

Thanks

Best Regards

Pier

[timblaktu]

Thanks Ricardo, and sorry I didn't get your response before just sending mine. Can you please follow up with answers to my questions, preferably without any recitations of the documents. Apologies in advance for my inability to understand the docs as written.

[timblaktu]

For context, there are other ambiguities about IW611 support for LC3, and the Auracast stack that requires it, in NXP docs:

1. RN00104: Section 3.2.2 Bluetooth LE (Pier's reference)
2. IW611 data sheet
   1. Section 1.3: Bluetooth Key Features lists Isochronous channels (ISOC) supporting LE Audio and Auracast™ Broadcast Audio but
   2. Section 4.2: Bluetooth Low Energy (LE) features lists Bluetooth LE isochronous channels with a footnote [6] that says: Bluetooth LE audio supported with external host running Low Complexity Communication codec (LC3) through HCI interface. There is no other mention of LC3 in the document, despite the fact that LC3 is a requirement for Auracast (as documented here and here).

So, I'll reverberate Pier's question from the perspective of a developer trying to implement Auracast on i.MX8mp-based platform:

Does the IW611 support LC3 in chipset hardware, or would implementing Auracast on i.MX8mp/IW611 require implementing the LC3 algorithm ourselves?

If only the latter is true, can you provide any suggestion or reference implementations for doing this on the i.MX8mp's M7 co-processor? (In this case, assuming that this is what was implied in 2.2 above by external host running LC3 through HCI)

Thanks in advance for your clarification and guidance!

[Ricardo_Zamora · Accepted solution]

Hello Pier,

Hope you are doing well. You can check on the Datasheet that Bluetooth LE audio supported with external host running Low Complexity Communication codec (LC3) through HCI interface.

Hope this helps.

Best Regards,

Ricardo