Digital effects processors showcase the best of digital signal processing, offering multiple effects like reverb, delay, and modulation in one unit. Eventide pioneered this field with the H910 Harmonizer, the first commercially available digital effects processor, combining pitch effects, delay, and feedback. This innovation cemented Eventide’s dominance, culminating in the cutting-edge H9000. Yamaha also made waves with the SPX90 in 1985, a one-rack-space processor featuring reverb, delay, chorusing, and more, leading to a successful SPX series. Other notable players like Alesis, Ensoniq, Korg, Kurzweil, Lexicon, Roland, Sony, and TC Electronic have contributed standout products, including the Ensoniq DP/4, DP/4+, and Sony DPS-V77.
