AFE-R761 Audio

Hardware pin definition：

SW Function：

AFE-R761 supports two kinds of sound cards: "0 hdmi" and "1 es8326c". To set the default audio output for media playback, follow these steps:

Setting：

1. Click “Applications” ->”Multimedia”->”PulseAudio Volume Control”.

2. Select “Build-in Audio stereo” for es8326c-codec output, or select “HDMI” for HDMI output.

Mute and Volume Control：

Mute and volume can be configured by GUI.

Audio Test

1. Get sound card ID.

# cat /proc/asound/cards
0 [rockchiphdmi0 ]: rockchip-hdmi0 - rockchip-hdmi0 rockchip-hdmi0
1 [rockchipes8326c]: simple-card - rockchip,es8326-codec rockchip,es8326-codec

2. Record

Take Card ID 1 for example：

# arecord -Dplughw:1,0 -f S16_LE -r 16000 -d 10 -t wav test.wav

3. Playback

Take Card ID 0 for example：

# aplay -Dplughw:0,0 -t wav test.wav

See details of the usage of  "aplay":

# aplay --help
… …
-D, --device=NAME select PCM by name
-t, --file-type TYPE file type (voc, wav, raw or au)
… …