AXIOMTEK SCM188 User Manual page 38

SCM188 NXP i.MX 8M Plus ARM-based SMARC Module
3.5.1.8 Audio Codec
The SCM188 with SCB184 supports the SGTL5000 audio devices. This section explains how
to test SGTL5000 audio codecs.
Please following the pin definition to connect audio signal.
⚫ To list the available audio interfaces, please execute the below command.
sh-5.1# aplay -l
⚫ The registered audio interfaces will be displayed on terminal as shown below,
**** List of PLAYBACK Hardware Devices ****
card 0: sgtl5000audio [sgtl5000-audio], device 0: HiFi sgtl5000-0 [HiFi sgtl5000-0]
Subdevices: 1/1
Subdevice #0: subdevice #0
card 0: sgtl5000audio [sgtl5000-audio], device 1: HiFi-ASRC-FE (*) []
Subdevices: 1/1
Subdevice #0: subdevice #0
The SCM188 with SCB184 BSP supports the Gstreamer framework. This part explains how to
play a multimedia file using Gstreamer framework.
⚫ To list the available plug-ins, please execute the below command.
sh-5.1# gst-inspect-1.0
⚫ To play a video file using gst-play utility, please execute the below command.
sh-5.1# gst-play-1.0 /<path to file>/<file_name>
⚫ To play an audio file using a particular audio device, please execute the below
command.
sh-5.1# gst-launch-1.0 filesrc location=<audio file> ! decodebin ! audioconvert ! alsasink
device=plughw:<card>,<subdevice>
⚫ To record an audio file using a particular audio device, please execute the below
command.
sh-5.1# gst-launch-1.0 -v alsasrc device= plughw:<card>,<subdevice> ! 'audio/x-raw,
rate=48000, channels=2' ! lamemp3enc ! filesink location=<file_name.mp3>
34 SCM188 BSP User Guide