I'm running Linux Mint 20.2 (x64 / Cinnamon). I'd like to play sound from a device connected to my sound card's line-in. I'm able to do so by enabling the loopback device in alsamixer. But even with the line-in level and line-in booster level set to 0, the volume is too loud. Adjusting the line-in volume level in pavucontrol seems to have no effect. Is there a way to reduce the volume level to an acceptable level? -- Paul