OS+Env: Slackware64-Current Hardware: Lenovo Thinkpad T420i Problem: Sound is working, but it isn’t loud enough Solution: Create a file /etc/asound.conf and paste this config: pcm.!default { type plug slave.pcm "softvol" } pcm.softvol { type softvol slave { pcm "dmix" } control { name "Pre-Amp" card 0 } min_dB -5.0 max_dB 20.0 resolution 6 } Restart ALSA (/etc/rc.d/rc.alsa restart) and there should be a new mixer channel called pre-amp in the mixer software (kmix/alsamixer).