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Re: [Discuss-gnuradio] USB Audio Adapter as audio source

From: Barry Duggan
Subject: Re: [Discuss-gnuradio] USB Audio Adapter as audio source
Date: Fri, 05 Jul 2019 15:26:35 -0400
User-agent: Roundcube Webmail/1.3.8

Kyeong and Marcus,

To clarify what I sent yesterday, I did click 'Set as fallback' when I ran pavucontrol. That probably had an effect on 'default', 'sysdefault', and 'hw:0,0' working.

In further testing, I found a method which gives a persistent name because, depending on boot-up timing, the card number varies. So, using a terminal screen:

for USB audio input (from a dongle):
arecord -L
find the entry such as:
       USB Audio Device, USB Audio
       Direct hardware device without any conversions
use hw:CARD=Device,DEV=0 as the device name

for audio output:
aplay -L
find the entry such as: (this is for HDMI sound)
       bcm2835 ALSA, bcm2835 IEC958/HDMI
       Direct hardware device without any conversions
use hw:CARD=ALSA,DEV=1 as the device name

Thanks for your help and support!

Barry Duggan

On 2019-07-04 00:41, Kyeong Su Shin wrote:
Hello Barry:

Maybe it is not 'the proper way', but maybe you can leave the "Audio
Source" as-is and set the input device using pavucontrol?


Kyeong Su Shin

보낸 사람: Barry Duggan <address@hidden> 대신 Discuss-gnuradio
보낸 날짜: 2019년 7월 4일 목요일 오전 10:48:36
받는 사람: Discuss Gnuradio
제목: [Discuss-gnuradio] USB Audio Adapter as audio source

I am trying to use a C-Media USB Audio Device as the audio source in my
flow graph. So far, I have not had any success with the device name.

I tried:
all variations of "C-Media Electronics Inc. USB Audio Device"
default (also an empty device name)
Device (there was a sym link)
hw:x,y with various numbers
plughw:x,y with various numbers
'PCM',x with various numbers
/proc/asound/card2 (which is the correct card from the list)

alsamixer shows the device as valid. There does not seem to be a 'mute'

Any suggestions?

Barry Duggan

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