ecasound (multitrack audio processing)

Ecasound is a software package designed for multitrack audio
processing. It can be used for simple tasks like audio playback,
recording and format conversions, as well as for multitrack effect
processing, mixing, recording and signal recycling. Ecasound supports
a wide range of audio inputs, outputs and effect algorithms. Effects
and audio objects can be combined in various ways, and their
parameters can be controlled by operator objects like oscillators and
MIDI-CCs. A versatile console mode user-interface is included in the
package.

Optional compile-time dependency:

- lilv - used for LV2 plugin support.

Optional runtime dependencies:
- TiMidity++ - required for MIDI .mid file input.
- libmikmod - required for tracker file support (such as .mod files).

This package uses POSIX filesystem capabilities to execute with
elevated privileges (required for realtime audio processing). This
may be considered a security/stability risk. Please read
http://www.slackbuilds.org/caps/ for more information. To disable
capabilities, pass SETCAP=no to the script.