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:
- lame - required for mp3 output.
- 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.