Acid Box (now Acid Box V2) is a virtual realtime Bass Line Synthesizer created and maintained by Audio Blast. It's a recreation Roland's famous 303 Bass Line Synth, but with additional features and capabilities. The complete version is now available (see link below). It is available as both a standalone application and as a VST plugin. The audio demos above are some sweepings of the synth's filter cutoff point at different resonance and filter envelope-depth settings.
Acid Box is both a monophonic synthesizer and a 64-step sequencer. It can be played using the midi keyboard (by selecting 'midi-in' near the tempo box at top right) or as a sequencer (by selecting internal or host sync). There is a section with 32 slots for pattern insertion, with full loading and saving capability that allows for realtime on-the-fly pattern switching. The Sequencer section provides a variety of options for controlling pattern size and triggering modes, note input, note accent and glide, etc. A tool bar at the bottom of the GUI allows control of sequence/pattern copy and paste, various types of randomizing, and note shift and transposition.
Acid Box's oscillator section allows for selection of either a saw or a square wave. Filter cutoff and resonance controls are provided, as well as filter envelope depth. The filter knob above the oscillator allows for a low-pass filter (knob set to left) and a high-pass filter (knob to right). Three additional controls will modify the sequencer notes: Accent, Gate and Groove. Lastly, there is a distortion section with 4 different distortion types (overdrive, clipper, valve, cruncher) and a delay section with sync and ping-pong delay options.
A manual is also included with Acid Box, which provides additional useful control tips.
