FB2 MANUAL ADDENDUM

  • Last update: 15 November 2017

MUST READ !

MIDDLE POSITION ADSR SWITCH

Here ADSR trigger 'freezes' in the red zone of the LFO,

This bizar 'feature' is incorporated after a batch of FB's accidentally got 3-pos switches. 

The LFO has a randomly influence on the ADSR.

The working of this is very dependent on the ADSR settings and LFO speed.

The ADSR can be softly retriggered by the LFO in some ADSR settings.

NOISE GENERATOR/ FEEDBACK CIRCUIT featured in all Filterbank2 models from serial number 7786 and higher.

This circuit is activated when no jack is plugged at the input, there are 4 different modes

  • both outs plugged : pure noise at input *

  • only 'Main out' plugged : noise & feedback mixed *

  • only 'Out1' plugged : feedback thru filter 2 *

  • only 'Out1' half plugged : pre VCA tap feedback thru filter 2 *

The noise * /feedback generator is pitched by filter 1 clock sample & hold circuit

( * half plug any jack in input will stop the noise generator and thus offer alternative feedback effects)

RANGE EXTENSION FUNCTION featured in all Filterbank2 models from serial number 8280 and higher.

Prior to this serial number, in Harmonic mode, Freq2 knob and ADSR amount knob were not used.

In Harmonic mode (blue led on) while Freq2 knob and ADSR amount knob are not zero, this function will:

  • transpose both center frequencies

  • downscale the harmonic ratios gradually

  • cut away low on LP and BP (sounds thinner)

  • boost low in HP (evolves to all pass)

  • create cross modulation interference distortion

    via all possible Freq2 modulations : Freq2 knob, ADSR, LFO, FM and MIDI Mod wheel

Mode

switch

MIDI function

FREE

  • F2 independent from F1

+ octave

Pitch wheel -> F1 Mod wheel -> F2

neutral

Pitch wheel -> F1 Mod wheel -> F2 + octave

+ quint

Pitch wheel -> F1 Mod wheel -> F2

Normal Harmonic

  • F2 knob closed

  • ADSR 2 knob neutral

+ octave

Pitch wheel -> F1 + F2 Mod wheel -> no effect

neutral

Pitch wheel -> F1 + F2 Mod wheel -> + octave

+ quint

Pitch wheel -> F1 + F2 Mod wheel -> no effect

Range extension Harmonic

  • F2 knob not closed

+ octave

Pitch wheel -> F1 + F2 Mod wheel -> RANGE EXT

neutral

Pitch wheel -> F1 + F2 Mod wheel -> RANGE EXT + octave

+ quint

Pitch wheel -> F1 + F2 Mod wheel -> RANGE EXT

,

Only the Rack models have an LFO out jack with triangle output, and when half plugged: square wave output

The dual racks have MIDI channel 1 and 2, all other models MIDI channel 16

Filterbank2 manual in .pdf www.sherman.be -> support -> downloads