how to crate pipe if usb sound card support mp3 decoder when using gst-launch?

[Diaz Soho]

Hi all,

If I use a USB sound card that has support mp3 decoder,
then how to crate pipe when I use gst-launch to play the mp3 audio file?
Since as my understanding,
gst-launch will output raw audio format for sound card,
when the effort of audio decode can be done by sound card,
can gst-launch be used for playing mp3 audio file?

thanks!
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