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The output of anything I record from my system sound using portaudio or parec is very low in volume.

With a maximum volume as -49dB when seen using ffmpeg -i video.avi -af "volumedetect" -vn -sn -dn -f null /dev/null from this answer.

I've spotted the issue to be this

This is the output of

pactl list sources

Source #0
    State: SUSPENDED
    Name: alsa_output.pci-0000_00_1f.3.analog-stereo.monitor
    Description: Monitor of Built-in Audio Analog Stereo
    Driver: module-alsa-card.c
    Sample Specification: s16le 2ch 48000Hz
    Channel Map: front-left,front-right
    Owner Module: 6
    Mute: no
    Volume: front-left: 9995 /  15% / -49.00 dB,   front-right: 9995 /  15% / -49.00 dB
            balance 0.00
    Base Volume: 65536 / 100% / 0.00 dB
    Monitor of Sink: alsa_output.pci-0000_00_1f.3.analog-stereo
    Latency: 0 usec, configured 0 usec
    Flags: DECIBEL_VOLUME LATENCY 
    Properties:
        device.description = "Monitor of Built-in Audio Analog Stereo"
        device.class = "monitor"
        alsa.card = "0"
        alsa.card_name = "HDA Intel PCH"
        alsa.long_card_name = "HDA Intel PCH at 0xd52b0000 irq 132"
        alsa.driver_name = "snd_hda_intel"
        device.bus_path = "pci-0000:00:1f.3"
        sysfs.path = "/devices/pci0000:00/0000:00:1f.3/sound/card0"
        device.bus = "pci"
        device.vendor.id = "8086"
        device.vendor.name = "Intel Corporation"
        device.product.id = "9d71"
        device.form_factor = "internal"
        device.string = "0"
        module-udev-detect.discovered = "1"
        device.icon_name = "audio-card-pci"
    Formats:
        pcm

...

As you can see front-left: 9995 / 15% / -49.00 dB, front-right: 9995 / 15% / -49.00 dB I need them both to be 100% I've tried pactl set-sink-vloume 0 100% but it does nothing.

I've also tried https://askubuntu.com/a/1206159/971923.

What is the commands to change the left and right both to a 100%?

I don't see those on alsamixer as well.

Using Ubuntu 20.04

I believe the os has nothing to do with the question (I'm asking for a command specific to pactl or related software like alsamixer).

Phani Rithvij
  • 124
  • 9

2 Answers2

1

To change the volume of the mentioned source with pactl you should use the command

pactl set-source-volume 0 100%

You used 

pactl set-sink-volume 0 100%

which sets the volume of the sink #0 to 100%, that's not what you intended to do.

mook765
  • 15,925
0

To change each individual channel, and after having looked everywhere, I finally found it!!

amixer -D pulse sset Master 100% = all speakers to 100%

amixer -D pulse sset Master Front 100% = front 100% (or whatever you specify)

amixer -D pulse sset Master Front 100%,50% = front left 100% , front right 50 %

So the same goes for Master Center, Master Rear, Master Side, Master Woofer

This took a very long time but finally I got it

Johan D.
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