Donner B1 Analog Bass Synthesizer & Sequencer with VCF, Saturation, and Delay Effects. In order to provide a better user experience, Donner B1 analog bass synthesizer has made unprecedented innovations in the operation interface, providing a simpler and more intuitive interface for all music lovers. And this innovation won the 2022 Red Dot Design Award. They’ve optimized the sequencer of this synthesizer to be easier and more intuitive to use. Easily edit your own sequences with 128 sequence presets covering a range of musical styles, and 128 user programmable presets. The Donner B1 sequencer features modern silicone keys with a color changing backlight, making them a joy to play. In addition to sequencing, you can also play your synth lines live with the keys. Get authentic analog deep bass tones, paired with distortion and tape delay for all the retro flavors. Perfect for electronic music producers, DJs, and Hip-Hop producers. The B1 controller has MIDI IN/OUT interface connects the B1 to your external MIDI devices for sequencing or as a MIDI controller. Connect external sound sources using the 1/8” audio input. The 1/4" TS mono Main Out carries the main output signal. The B1 controller & sequencer features all of the classic synth's deep bass and acid synthesizer sounds but brings it back in a more intuitive format. B-1 bass synth gives you the perfect combination of retro and new school incredible.