Bombass is a monophonic, analogue synthesizer. The schematics of the VCF, VCA and the envelops are similar to the TB-303, with a lot of new features. With Midi, the pitch, length, slide and accent are controlled. It si also possible to controll the bombass with the inputs CV In, Gate In and Accent In from the sequencer ot the Bassline. The Bombass works then as the synthesizersection of the Bassline, with much more sound variations, than known from TB-303 modifications.
Midi-Interface Midi connection Bombass must be connected with a Midi-cable on its Midi In, to the Midi Out of the Midi-master (Midi-sequencer, laptop, …). Midi Thru gives the Midi-informations of the Midi-master to further Midi-slaves. Set the Midi-channel Push the Midi-Learn buttom for at least two seconds, then the LED on the top flashs. The next received Midi-note defines the Midi-channel. To change the Midi-channel, the Midi-lLearn buttom must be pushed again.
Slide When a second Midi-note is received, while the first is playing, the Slide-function is activated. The pitch changes to the new pitch of the second note. Accent Velocity values higher than 99 activate the Accent. The Accent is finished with the Midi-note off. Inputs Audio In Audio in (6.3 mm, mono) is an audio input, that is mixed to the audio signal path before the filter. FM In FM in is an input (3.5 mm of mono) to modulates the cutoff frequency of the filter.
CV In The CV In converts 1V/octave to the pitch. Gate In The Gate In needs a 5-12 Volt signal to controll the note-length. Accent In The Accent In needs a 5-12 Volt signal to controll the accent-length. The Accent In is normally controlled with the Accent Out of a Bassline, to play its lines, with the extended sound variations of the Bombass. Outputs Audio Outputs: Output is the main output (6,3 mm of mono), to connect a mixer. Headphones is a headphone output (3.5 mm stereo).
Voltage Supply The bassline can be operated only with the provided AC power plug (14VAC/300mA). Do not use other power plug! The bassline has an on/off switch on the right back panel. Spare power plugs can bought at acidlab, or directly at Conrad electronics under the part number: 510003-12 . In the USA or at 115VAC nets, you need the power plug of mouser.com with the part number: 507-XT1620 .