Jack is designed for professional audio. In this chapter you will apply the techniques from earlier chapters to building a karaoke system.
Using Jack Rack for Effects
Karaoke takes inputs from MIDI sources and from microphones. These are mixed together. Generally there is an overall volume control, but there is usually a volume control for the microphones as well. While the MIDI source should be passed straight through, it is common to apply a reverb effect to the microphones.
These are all effects that can be supplied by LADSPA modules (see Chapter 14). The Jack application jack-rack makes these ...
