Just had full service by perfect working order sounds fantastic, selling due to mega downsizing of studio local collection perfared, but can deliver in person (UK) but will post anywhere
What is the Sherman QMF ?
4 Sherman Filterbanks in 1 box, numbered 1, 2, 3 and 4. The numbers also apply to the MIDI channel at which the 4 filterbanks are programmed. E.g. filterbank 1 has MIDI channel 1, filterbank 2 has MIDI channel 2 etc…
The 4 filterbanks have a separate input (i.e. you can plug in 4 different sound sources into the 4 different filterbanks, so actually it’s some kind of weird mixing desk), or you can link them all together (i.e. when 1 input is used, you can process the source through all 4 filterbanks, and then you may have a filter slope of 96dB…)
EXTRA FEATURES IN THE QMF (that are not in the regular Filterbank)
Filters 3 & 4 have the following 6 extra switches (so 12 extra features in total) :
BRIGHT : Boosts high frequencies at input
LIMIT : Clips input signal at lower level, in favour of the self-resonating behaviour of the filters. Setting the in level extremely high will not blow away the filter reso waves in “limit”.
SLOW : In position “SLOW” the average speed of the AD(S)R / env.follower slopes is as in a regular Filterbank. If “slow” is switched off, the AD(S)R / env.follower slopes are about 5 times faster.
TRIGGER : Enables “a kind of” LFO restart at the "on"going AR TRIGGER
(sawtooth sign) : Selects sawtooth waveform for the LFO.
+1 OCTAVE : Doubles the center-frequency of both filters, even if in “no signal” position of the harmonics. Overrides the MIDI +1 octave function.
2 EXTRA JACK-SOCKETS ON EACH FILTER :
LFO OUTPUT : To connect to ANY input : eg : AM, AM Depth, FM, AR trig; ADSR trig.
AM DEPTH CV INPUT : Control Voltage input for the internal VCA that controls the flow from the AM source to the signal VCA’s for Out1 and Main out. (in the manual, here is a drawing of the above described VCA connections)
- top layer of extra varnish on the painting (so the print of lines / numbers stays longer)
- wooden side panels, canberra wood
- internal power supply, with a normal power PLUG cord
- 10 extra JACK-JACK cables of 60 centimeters delivered with each QMF
Voltage : 230 V / 115 V alternate current, switchable
Power rating : 18 VA
Weight : 9 kg Packed
HEIGHT : 15 CENTIMETER (= 5.9 inch)
WIDTH : 54 CENTIMETER (= 21.25 inch)
DEPTH : 41 CENTIMETER (= 16.14 inch)