The Yamaha SPX1000 is a highly sophisticated digital reverberation and effects system which offers 40 preset effect programs including accurate simulations of natural reverberation and early-re?ections, delay and echo effects, gated effects, modulation effects, a versatile compressor, a low-level expander, a harmonic exciter, multiple effects which function as several Yamaha SPX1000 units in one, independent 2-channel effects, freeze (sampling) programs and others.