QasTools is a collection of desktop applications for the Linux sound system ALSA.

The applications included are: - QasConfig - browser for the ALSA configuration tree - QasHctl - mixer for ALSA's High level Control Interface - QasMixer - desktop mixer with features similar to alsamixer

QasHctl is a mixer application for ALSA's "High level Control Interface". This interface allows more complex interaction than the "Simple Mixer Interface" which is used by alsamixer and QasMixer.