Softvol
lastmod 2026-11-10created 2020-04-012 edits
Softvol is a plugin for ALSA (Advanced Linux Sound Architecture) that adds software-based volume control to sound devices whose hardware mixer does not support volume adjustment. Defining a type softvol PCM in .asoundrc or asound.conf creates a new mixer control that can be adjusted in alsamixer. Because it applies gain directly to the playback data, it is useful for devices without volume control, such as USB DACs.