IMX8 Android Audio: Difference between revisions

From Variscite Wiki
 
(2 intermediate revisions by the same user not shown)
Line 7: Line 7:
To give you an overview we recommend you go through the https://source.android.com/devices/audio document(s).<br>
To give you an overview we recommend you go through the https://source.android.com/devices/audio document(s).<br>
and get familiar with the terminologies and configuration. <br>
and get familiar with the terminologies and configuration. <br>
This requires prior knowledge of the Linux Kernel Alsa layer and https://www.alsa-project.org/wiki/Developer_Zone  
This requires prior knowledge of the Linux Kernel Alsa layer and https://www.alsa-project.org/wiki/Developer_Zone. <br>
 
===Android Provides===
===Android Provides===
# Audio HAL from NXP
# Audio HAL from NXP and json configuration files.
# Variscite adds EVK hardware support such as codec, and DMIC support to the HAL
# Variscite adds EVK hardware support such as codec, and DMIC support to the HAL.
# Once you program the images, it comes with the required HAL support to verify the Audio input / Output Functionality of the Dev Kit
# Once you program the images, it comes with the required HAL support to verify the Audio input / Output Functionality of the Dev Kit.


===Hardware Setup===
===Hardware Setup===
===={{#var:HARDWARE_NAME}}====
===={{#var:HARDWARE_NAME}}====
- Line IN: J21 - Audio Jack 3.5 mm  <br>
- Line IN: J21 - Audio Jack 3.5 mm. <br>
- Headphone Out: J22 - Audio Jack 3.5mm <br>
- Headphone Out: J22 - Audio Jack 3.5mm. <br>
- DMIC: On board (Default Audio In route)
- DMIC: On board (Default Audio In route).


====Audio In====
====Audio In====
- Connect 3.5 mm jack to Audio In: Ref:https://www.amazon.ca/AmazonBasics-3-5mm-Stereo-Audio-Cable/dp/B00NO73MUQ <br>
- Connect 3.5 mm jack to Audio In: Ref:https://www.amazon.ca/AmazonBasics-3-5mm-Stereo-Audio-Cable/dp/B00NO73MUQ. <br>
- One end to Audio Output of the source you wish to record, one end to Audio In Jack of the {{#var:HARDWARE_NAME}} see above <br>
- One end to Audio Output of the source you wish to record, one end to Audio In Jack of the {{#var:HARDWARE_NAME}} see above: <br>


====Audio Output====
====Audio Output====
- Connect 3.5 mm headphone jack to headphone/speaker
- Connect 3.5 mm headphone jack to headphone/speaker.


==Audio In test==
==Audio In test==
====DMIC test====
====DMIC test====
By default, if you don't connect the audio input is selected via onboard DMIC
By default, if you don't connect the audio input is selected via onboard DMIC. <br>
 
- Start the Sound Recorder app as per below screenshot:<br>  
 
- If the app asks for permissions click on allow for microphone and internal storage dialoge.<br>
- Start Sound Record as per below screen shot<br>  
- If app asks for permissions click on allow for microphone and internal stroage dialoge<br>  


====Line In test====
====Line In test====
Use the above recording application to record via the application.
Use the above recording application to record via the application.


- Run below commands on adb shell
- Run the below commands on adb shell
  # tinymix 'Headphone Volume' 35;tinymix  'Capture Input' ADC;tinymix 'DMIC Mux' DMIC2;
  # tinymix 'Headphone Volume' 35;tinymix  'Capture Input' ADC;tinymix 'DMIC Mux' DMIC2;


- Make sure you have an audio line in source playing some music if you are performing Line In test<br>
- Make sure you have an audio line in the source playing some music if you are performing Line In test.<br>
- Click on the record button and you should see the below screen<br>
- Click on the record button and you should see the below screen.<br>
[[File:Imx8_Audio_In.png]]
[[File:Imx8_Audio_In.png]]



Latest revision as of 09:28, 18 September 2023

Warning: This page is designed to be used with a 'release' URL parameter.

This page is using the default release RELEASE_O8.1.0_1.3.0_8M_DART-MX8M.
To view this page for a specific Variscite SoM and software release, please follow these steps:

  1. Visit variwiki.com
  2. Select your SoM
  3. Select the software release
DART-MX8M - Android Oreo - Audio

Android Audio

To give you an overview we recommend you go through the https://source.android.com/devices/audio document(s).
and get familiar with the terminologies and configuration.
This requires prior knowledge of the Linux Kernel Alsa layer and https://www.alsa-project.org/wiki/Developer_Zone.

Android Provides

  1. Audio HAL from NXP and json configuration files.
  2. Variscite adds EVK hardware support such as codec, and DMIC support to the HAL.
  3. Once you program the images, it comes with the required HAL support to verify the Audio input / Output Functionality of the Dev Kit.

Hardware Setup

DART-MX8M

- Line IN: J21 - Audio Jack 3.5 mm.
- Headphone Out: J22 - Audio Jack 3.5mm.
- DMIC: On board (Default Audio In route).

Audio In

- Connect 3.5 mm jack to Audio In: Ref:https://www.amazon.ca/AmazonBasics-3-5mm-Stereo-Audio-Cable/dp/B00NO73MUQ.
- One end to Audio Output of the source you wish to record, one end to Audio In Jack of the DART-MX8M see above:

Audio Output

- Connect 3.5 mm headphone jack to headphone/speaker.

Audio In test

DMIC test

By default, if you don't connect the audio input is selected via onboard DMIC.
- Start the Sound Recorder app as per below screenshot:
- If the app asks for permissions click on allow for microphone and internal storage dialoge.

Line In test

Use the above recording application to record via the application.

- Run the below commands on adb shell

# tinymix 'Headphone Volume' 35;tinymix  'Capture Input' ADC;tinymix 'DMIC Mux' DMIC2;

- Make sure you have an audio line in the source playing some music if you are performing Line In test.
- Click on the record button and you should see the below screen.
Imx8 Audio In.png

Audio Out test

- To review recorded audio, you may click on the play button
Imx8 Audio Review.png
- Click on the music player app (Cactus Player)
Imx8 Audio Out Cactus Player.png
- Click on music / recorded audio you captured
Imx8 Audio Out Cactus Playing Audio.png