Getting started with audio stuff on nRF5340 Audio DK

[daubsi]

I am starting to experiment with the nRF 5340 Audio DK. I already have quite some experience with the nRF52 DK platform.

My goal would be to implement a simple guitar effect processor which takes input from the "audio in" jack, processes it and outputs it again via "audio out".

I've done similar things back in university times with a TI ezDSP CC5535 and would expect it to be somewhat similar here, although of course on a totally different platform.

So currently I am looking for simple "Hello World" examples from the Audio world for this DK which conveniently already has all the necessary codec HW on board.

I am looking for simple stuff like "Generate and play back a sine way of 1000 Hz for 1 sec" or "Record from audio in for 1s, reverse the sample and output again".

From what I found in the nRF Connect SDK no such examples seem to be included there? I'm happy to take it from there with implementing the various effects etc. then.

Could you give me some pointers where to start with those things? 

[dejans]

Hi,

Currently, there are no simple audio samples but a big nRF5340 audio application. There is documentation which provides overview and firmware architecture, and shows configuration and testing steps of the audio application.

Best regards,
Dejan

[daubsi]

Hi, 

I actually tried to dissect the "audio app" but it's a quite big and complex app and not so very easy to understand. I was however already successful so far to be able to play back directly testones via the headphones. It's a start, from where I can pivot.

[dejans]

Hi,

Thank you for the update.

Best regards,
Dejan

[RajendraN]

Hi Daubsi,

How did you do it? Could you please guide me?

Warm Regards,
Rajendra.

[dejans]

Hi Rajendra,

You can start by looking at the functionality of the Button 4 in nrf5340_audio application. Please look at buttons, user interface and testing sections of the audio application. If you have some questions, please open new ticket and provide relevant information.

Best regards,
Dejan

[RajendraN]

Hi Dejans

Thanks for your response, I enabled below points in prj.config

#Audio

CONFIG_AUDIO_SOURCE_I2S=n

# CONFIG_STREAM_BIDIRECTIONAL=y

CONFIG_AUDIO_SOURCE_USB=y

CONFIG_AUDIO_DEV=1

   

CONFIG_BT_VCP_VOL_REND=y

CONFIG_BT_CSIP_SET_MEMBER=y

# CONFIG_BT_MCC=y

# CONFIG_I2S=y

# CONFIG_BT_BAP_UNICAST_CLIENT=y

# CONFIG_AUDIO_DEV=1

CONFIG_TRANSPORT_CIS=y

it is correct to hear the audio data in nrf5340 audio dk board.

Warm Regards,
Rajendra

[dejans]

Hi Rajendra,

Please open a new ticket and provide information there. I will be out of the office and will not be able to follow up on this. 

Best regards,
Dejan