Bitsonic TB-303 size 2.47 MB Bitsonic TB-303 is a poly/monophonic bass line synthesizer with a single digitally modelled analogue oscillator, filter and decay envelope. Simple/Bub mode. Filter. ADSR. Saw/Square oscillators. Reverb. Delay. Phaser. Portamento. Poly/Mono. Stereo/mono mode. Control with Knob/Velocity ...