IMX8 Android Audio: Difference between revisions

Latest revision as of 09:28, 18 September 2023

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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

Audio HAL from NXP and json configuration files.
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.

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.

Audio Out test

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

- Click on the music player app (Cactus Player)

- Click on music / recorded audio you captured

@@ Line 1: / Line 1: @@
 <!-- Set release according to "release" parameter in URL and use RELEASE_O8.1.0_1.3.0_8M_DART-MX8M as default
+--> {{INIT_RELEASE_PARAM|RELEASE_O8.1.0_1.3.0_8M_DART-MX8M}}<!--
 --> {{#vardefine:RELEASE_PARAM|{{#urlget:release}}}} <!--
 --> {{#lst:Android_Platform_Customization|{{#var:RELEASE_PARAM|RELEASE_O8.1.0_1.3.0_8M_DART-MX8M}}}} <!--
---> {{PageHeader|{{#var:HARDWARE_NAME}} - Android {{#var:ANDROID_NAME}} {{#var:ANDROID_VERSION}} Android Audio}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Android}} __toc__
+--> {{PageHeader|{{#var:HARDWARE_NAME}} - {{#switch: {{#var:ANDROID_NAME}} | Android 10 = {{#var:ANDROID_NAME}} | Android 11 = {{#var:ANDROID_NAME}} | | Android 12 = {{#var:ANDROID_NAME}} | Android 13 = {{#var:ANDROID_NAME}} | Android {{#var:ANDROID_NAME}} }} - Audio}} {{DocImage|category1=Android|category2={{#var:HARDWARE_NAME}}}} __toc__
 ==Android Audio==
-To give you overview we recommend you go through the https://source.android.com/devices/audio documents.
+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>
+This requires prior knowledge of the Linux Kernel Alsa layer and https://www.alsa-project.org/wiki/Developer_Zone. <br>
 ===Android Provides===
-# Audio HAL from NXP
+# Audio HAL from NXP and json configuration files.
-# Variscite adds EVK hardware support such as codec, 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.
+# 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===
 ===={{#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
+- 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 <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====
-- Connect 3.5 mm headphone jack to headphone / speaker
+- Connect 3.5 mm headphone jack to headphone/speaker.
 ==Audio In test==
-- Start Sound Record as per below screen shot<br>
+====DMIC test====
-- Make sure you have audio available
+By default, if you don't connect the audio input is selected via onboard DMIC. <br>
-- Click on the record button and you should see below screen
+- Start the Sound Recorder app as per below screenshot:<br>
-[[File:Audio_In.png]]
+- If the app asks for permissions click on allow for microphone and internal storage dialoge.<br>
-==Audio Out test==
+====Line In test====
-- To review recorded audio, you may click on play button <br>
+Use the above recording application to record via the application.
-[[File:Audio_Review.png]] <br>
-- Click on music player app (Cactus Player) <br>
-[[File:Audio_Out_Cactus_Player.png]]<br>
-- Click on music / recorded audio you captured <br>
-[[File:Audio_Out_Cactus_Playing_Audio.png]]<br>
+- 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.<br>
+- Click on the record button and you should see the below screen.<br>
+[[File:Imx8_Audio_In.png]]
-==DMIC test==
+==Audio Out test==
-To setup the DMIC use blow commands
+- To review recorded audio, you may click on the play button <br>
+[[File:Imx8_Audio_Review.png]] <br>
-===Check current status (Default is - Line in)===
+- Click on the music player app (Cactus Player) <br>
-Coming Soon.
+[[File:Imx8_Audio_Out_Cactus_Player.png]]<br>
+- Click on music / recorded audio you captured <br>
-===To set DMIC rate 128x===
+[[File:Imx8_Audio_Out_Cactus_Playing_Audio.png]]<br>
-Coming Soon.
-===To set DMIC rate 64x===
-Coming Soon.
-===To set DMIC rate 32x===
-Coming Soon.
-===To rurn-off DMIC===
-Coming Soon.
-Use above recording application to record via the application.