It was used in Oberheim OB12 (5 units!, check third picture), Korg Z1 (6 units!).
STRICH DSP Mini Electric Guitar Practice Amplifer, 2 x 5W Dual-Speaker Desktop Amp with Clean/Distortion, 3-4H Battery, 3.5mm Headphone Jack, Wireless Portable for Indoor Practice & Travel, Black
Audio Interface Professional Recording XLR Audio Interface DSP Reverb 48V Phantom Power Sound Card 16bit/48kHz Resolution Plug and Play for Music Recording Online Karaoke Vocal Recording
STRICH DSP Mini Electric Guitar Practice Amplifier, 2 x 5W Dual-Speaker Desktop Amp with Clean/Distortion, 3-4H Battery, 3.5mm Headphone Jack, Wireless Portable for Indoor Practice & Travel, Orange
Fender Acoustasonic 30 DSP Portable Cabinet Guitar Amplifier Type PR 423
KORG Volca Drum Digital Percussion Synthesizer DSP Analog Modeling Sequencer
YAMAHA APX 700 DSP ELECTRO ACOUSTIC GUITAR.
