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Audio_ROM-5880_

ROM-5880 supports 2 sound cards: 0 hdmi (with Audio), 1 rt5640-codec. (Connect Audio boardROM-EG57 on CN17 of SOM-DB2510 carrier board, set SW3 to 2.)

Step 1：HDMI​

Set the default audio output when playing media files, if it supports audio. 1. Entry start->Sound & Video->PulseAudio Volume Control.

  1. Select “Build-in Audio stereo” for HDMI output or Select “Build-in Audio Speaker …” for rt5640-codec output.

Step 2：Audio codec​

  1. Get sound card ID.
cat /proc/asound/cards

0 [rockchiphdmi ]: rockchip_hdmi - rockchip,hdmi
rockchip,hdmi
1 [rockchiprt5640c]: rockchip_rt5640 - rockchip,rt5640-codec
rockchip,rt5640-codec
  1. Record_0/1->rt5640-codec_

Take Card ID 1 for example：

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

Take Card ID 1 for example：

aplay -Dplughw:1,0 -t wav test.wav