EPC-R5710 Audio

Audio

Step 1: Check audio codec
Card 0 is IMX digital array audio, Card 1 is sgtl5000 audio , Card 2 is HDMI audio

# cat /proc/asound/cards
0 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil
imx-audio-micfil
1 [sgtl5000]: sgtl5000 - sgtl5000 sgtl5000
2 [audiohdmi]: audio-hdmi - audio-hdmi
audio-hdmi

Audio codec（sgtl5000）

1. Set MIC and headphone:

# amixer -c1 set Mic 32%
Simple mixer control 'Mic',0
Capabilities: volume volume-joined
Playback channels: Mono
Capture channels: Mono
Limits: 0 - 3
Mono: 1 [33%] [20.00dB]
# amixer -c1 set Lineout 100%
Simple mixer control 'Lineout',0
Capabilities: pvolume
Playback channels: Front Left - Front Right Limits: Playback 0 - 31
Mono:
Front Left: Playback 31 [100%] [0.00dB]
Front Right: Playback 31 [100%] [0.00dB]
# amixer -c1 set PCM 100%
Simple mixer control 'PCM',0
Capabilities: pvolume
Playback channels: Front Left - Front Right
Limits: Playback 0 - 192
Mono:
Front Left: Playback 192 [100%]
Front Right: Playback 192 [100%]

2. sgtl5000 Record and Playback:

# arecord -Dplughw:1,0 -t wav -d 5 -c 2 -V stereo audio-luyin.wav
# aplay -Dplughw:1,0 audio-luyin.wav

HDMI Playback

# arecord -Dplughw:1,0 -t wav -d 5 -c 2 -V stereo audio-luyin.wav
# aplay -Dplughw:2,0 audio-luyin.wav

Mic array Record and playback

Step 1：Check audio codec

# cat /proc/asound/cards
0 [imxaudiomicfil ]: imx-audio-micfi - imx-audio-micfil
imx-audio-micfil
1 [sgtl5000]: sgtl5000 - sgtl5000
sgtl5000
2 [audiohdmi]: audio-hdmi - audio-hdmi
audio-hdmi

Step 2：Record with mic array and Playback with HDMI

# arecord -Dplughw:0,0 -t wav -d 5 -c 2 -V stereo mic-array-luyin.wav
# aplay -Dplughw:2,0 mic-array-luyin.wav