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Distribution: Debian /Jessie/Stretch/Sid, Linux Mint DE
Posts: 5,195
Rep:
Run arecord and dump the output on screen. Is it all the same character you are seeing? (Usually an inverse video "?" or "}") Maybe only those 2 characters? Then you are recording zeros and you don't have sound being recorded. Use alsamixer to find out if your inputs are capturing.
If the output appears as garbage, really randon, redirect the output into a file using >.
arecord -l output:
**** List of CAPTURE Hardware Devices ****
card 0: Intel [HDA Intel], device 0: ALC272 Analog [ALC272 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
arecord -L output:
null
Discard all samples (playback) or generate zero samples (capture)
default:CARD=Intel
HDA Intel, ALC272 Analog
Default Audio Device
front:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
Front speakers
surround40:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
4.0 Surround output to Front and Rear speakers
surround41:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
4.1 Surround output to Front, Rear and Subwoofer speakers
surround50:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
5.0 Surround output to Front, Center and Rear speakers
surround51:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
5.1 Surround output to Front, Center, Rear and Subwoofer speakers
surround71:CARD=Intel,DEV=0
HDA Intel, ALC272 Analog
7.1 Surround output to Front, Center, Side, Rear and Woofer speakers
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