Posts: 1
Joined: Wed May 29, 2019 8:42 am

Audio from USB Card

Wed May 29, 2019 12:31 pm

Hi there,
I am using a USB speaker to output the audio of Raspberry 3B+. The sound is perfect, but how can I figure out the audio quality which comes from the speaker. For example, I use a music player to play a track whose sample is 192kHz and bit rate is 24bit, how can I know if the output audio quality is as the same as the input source?

Man in a van
Posts: 120
Joined: Sat Dec 27, 2014 2:41 pm
Location: Staffordshire, UK.

Re: Audio from USB Card

Fri May 31, 2019 9:14 am

Try with this command

Code: Select all

cat /proc/asound/card1/pcm0p/sub0/hw_params
You will need to find your card number and have the stream playing.

This is my usb card playin fip radio
[email protected]:~ $ cat /proc/asound/card1/pcm0p/sub0/hw_params
format: S32_LE
subformat: STD
channels: 2
rate: 44100 (44100/1)
period_size: 441
buffer_size: 1764
[email protected]:~ $
hope this helps


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