Allwinner T113-i Audio and Video Testing Guide

Audio and video functions are core applications in modern embedded systems. On the Allwinner T113-i development board, the available audio and video interfaces provide developers with flexible testing and debugging options. This guide summarizes practical test methods for quickly validating a device's audio and video performance, useful for video output verification and audio issue troubleshooting.

1. Video playback test

Use gst-launch-1.0 to play a video file (video only, no audio):

$ gst-launch-1.0 filesrc location=/talowe_test/jj.mp4 ! decodebin ! videoconvert ! autovideosink

2. Audio tests

2.1 Record audio

The board has on-board microphones (silk-marked MIC). Configure the input interface to the on-board microphone:

$ tinymix -D 0 set "MIC1 Input Select" 0
$ tinymix -D 0 set "MIC2 Input Select" 0
$ tinymix -D 0 set "MIC3 Input Select" 1
$ tinymix -D 0 set "ADC1 Input MIC1 Boost Switch" 0
$ tinymix -D 0 set "ADC2 Input MIC2 Boost Switch" 0
$ tinymix -D 0 set "ADC3 Input MIC3 Boost Switch" 1

Record for 10 seconds (file saved in the current directory):

$ arecord -Dhw:0,0 -d 10 -f dat -r 44100 -c 1 -t wav record.wav

Play back the recorded audio:

$ aplay -Dhw:0,0 -r 44100 -f S16_LE -c 1 record.wav

2.2 Headset microphone recording (silk-marked AUDIOOUT)

Configure the input interface to the headset microphone:

$ tinymix -D 0 set "MIC1 Input Select" 0
$ tinymix -D 0 set "MIC2 Input Select" 1
$ tinymix -D 0 set "MIC3 Input Select" 0
$ tinymix -D 0 set "ADC2 Input MIC2 Boost Switch" 1
$ tinymix -D 0 set "ADC3 Input MIC3 Boost Switch" 0

Record for 10 seconds (file saved in the current directory):

$ arecord -Dhw:0,0 -d 10 -f dat -r 44100 -c 1 -t wav record.wav

Play back the recorded audio:

$ aplay -Dhw:0,0 -r 44100 -f S16_LE -c 1 record.wav

2.3 Play test audio

Play the audio test script included in the board filesystem:

$ /talowe_test/test_audio.sh

2.4 Volume control

Use the audio device console:

$ alsamixer

Use the keyboard arrow keys to adjust levels.

2.5 Speaker control (default on, volume 5)

Turn off speaker output:

$ amixer -D hw:audiocodec cset name='LINEOUT Switch' off

Turn on speaker output:

$ amixer -D hw:audiocodec cset name='LINEOUT Switch' on

Set speaker volume

$ amixer -D hw:audiocodec cset name='LINEOUT volume' VALUE

Example: set the volume to 10

$ amixer -D hw:audiocodec cset name='LINEOUT volume' 10

2.6 Headphone control (default on, volume 2)

Turn off headphone output:

$ amixer -D hw:audiocodec cset name='Headphone Switch' off

Turn on headphone output:

$ amixer -D hw:audiocodec cset name='Headphone Switch' on

Set headphone volume:

$ amixer -D hw:audiocodec cset name='Headphone volume' VALUE

Example: set the headphone volume to 5

$ amixer -D hw:audiocodec cset name='Headphone volume' 5