VAR-SOM-MX6 Android Audio

Android Audio

To give you overview we recommend you go through the https://source.android.com/devices/audio documents.

Android Provides

1. Audio HAL from NXP
2. Variscite adds codec support to the HAL
3. Once you program the images, it comes with the required HAL support.

Audio In

- Connect 3.5 mm jack to Audio In: Ref:https://www.amazon.ca/AmazonBasics-3-5mm-Stereo-Audio-Cable/dp/B00NO73MUQ
- One side Audio Output, one side Audio In Jack of the platform.
- Depending upon the HW connect the audio jack as per following connectors.

VAR-SOM-MX6

- Line IN: J21
- Headphone Out: J20
- DMIC: On board

DART-MX6

- Line IN: J3
- Headphone Out: J2
- DMIC: Onboard

VAR-SOM-Solo/Dual

- Line IN: J3
- Headphone Out:J2
- DMIC: Onboard

Audio Output

- Connect 3.5 mm headphone jack to headphone / speaker

Audio In test

- Start Sound Record as per below screen shot
- Make sure you have audio available - Click on the record button and you should see below screen

Audio Out test

- To review recorded audio, you may click on play button

- Click on music player app (Cactus Player)

- Click on music / recorded audio you captured

DMIC test

To setup the DMIC use blow commands

Check current status (Default is - Line in)

var_mx6:/ # tinymix 'DMic Rate'
DMic Rate: >off 128x 64x 32x

To set DMIC rate 128x

var_mx6:/ # tinymix 'DMic Rate' '1'
var_mx6:/ # tinymix 'DMic Rate'
DMic Rate: off >128x 64x 32x

To set DMIC rate 64x

var_mx6:/ # tinymix 'DMic Rate' '2'
var_mx6:/ # tinymix 'DMic Rate'
DMic Rate: off 128x >64x 32x

To set DMIC rate 32x

var_mx6:/ # tinymix 'DMic Rate' '3'
var_mx6:/ # tinymix 'DMic Rate'
DMic Rate: off 128x 64x >32x
var_mx6:/ #

To rurn-off DMIC

var_mx6:/ # tinymix 'DMic Rate' off
var_mx6:/ # tinymix 'DMic Rate'
DMic Rate: >off 128x 64x 32x
var_mx6:/ #

Use above recording application to record via the application.