nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

dejans — Wed, 03 Jul 2024 18:44:43 GMT

Hi,

It is possible to convert PCM data to WAV.
You can read about the similar issue - extracting data using dmic.

Best regards,
Dejan

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

Virat — Tue, 02 Jul 2024 10:45:02 GMT

Hi Dejans,

I am taking the sample code is Dmic sample in that do_PDM_transfer function is there,In this function I added below logic.

uint16_t *data_ptr = (int *)buffer;
for(int j = 0; j < size/2; j++){
printk("%x ", *data_ptr);
data_ptr++;
}

This data can convert to .wave or any other audio format file?

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

dejans — Tue, 02 Jul 2024 10:10:46 GMT

Hi Argus,

[quote user="dejans"]Where did you take your log from?
Could you specify what kind of file verification you are interested in?[/quote]

Could you provide this information?

Could you also provide more information about your application? What is your application doing and what do you expect to happen?

[quote user="Argus"](I am using sample code)[/quote]

Which sample code do you use?

Best regards,
Dejan

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

Virat — Mon, 01 Jul 2024 11:18:49 GMT

Board Detals: nRF5340-DK

Version:SDK v2.6.0

MIC Details:IMP34DT05

MIC is interfacing with PDM. Getting the below data. How to verify weather data is correct are not.
(I am using sample code)

f85f f898 f8dc f8e2 f8f4 f905 f8fa f903 f917 f91d f946 f976 f990 f9aa f9be f9dc fa0a fa37 fa6c fa7e fa9e fac1 fad7 fadd fae1 faf1 faf0 fae5 fadd

Regards,

Argus.

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

dejans — Mon, 01 Jul 2024 09:12:06 GMT

Hi Argus,

Could you provide more information about your board and your application?

[quote user="Argus"]

As we shared LOG information about PDM data is correct ?

Could you please verify the file(PDM_outputdata_280624.txt).

[/quote]

Where did you take your log from?
Could you specify what kind of file verification you are interested in?

Best regards,
Dejan

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

Virat — Sat, 29 Jun 2024 07:13:03 GMT

As we shared LOG information about PDM data is correct ?

Could you please verify the file(PDM_outputdata_280624.txt).

Regards,

Argus.

RE: nRF5340 PDM Mic data send over BLE to PC/mobile to process the audio file

dejans — Fri, 28 Jun 2024 14:57:45 GMT

Hi,

Both boards contain nrf5340 SoC which has I2S compatible, digital microphone PDM interface. In comparison to nrf5340-dk, nrf5340_audio-dk has been specifically designed for demonstrating the capabilities of nrf5340_audio applications. It is recommended platform for developing of LE Audio products.

Best regards,
Dejan