Wiardgroup

hello grant,

this is amazing. top notch design from you again :-)

best wishes

ingo



--- Grant Richter <grichter@asapnet.net> schrieb:

> After years of design and months of work I have a kind of working
> prototype of the 
> Envelooper MARF. It works, but not perfectly yet. I am still getting
> the bugs out. This is 
> targeted to the Frac-Rac format.
> 
> MARF stands for "Multiple Arbitrary Function Generator". One of the
> shortcomings of 
> modular synthesis is the lack of complex controllers for modules. To
> generate a complex 
> control function now, you have to sum together multiple envelopes and
> LFOs. The 
> Envelooper allows you to draw complex control functions visually,
> with enough points to 
> reproduce the effect of summing multiple envelopes and LFOs. It also
> stores pitches like a 
> sequencer, and you can draw an envelope in channel 4 for each pitch.
> 
> The Envelooper is designed to support true "gestural" synthesis where
> a single key press 
> or button push can produce control signals for a complete musical
> gesture. Multiple 
> gestures are stored in different Banks and can be selected by voltage
> control. Using a 
> black and white keyboard, you can select and trigger gestures with
> just the keyboard. The 
> Envelooper also has a "Loop" switch that sets it to free running loop
> without needing a 
> gate or trigger.
> 
> The Envelooper is modeled after an ADSR envelope generator. For the
> Envelooper, each 
> segment of the A, D, S and R is four 256 byte pages stored in a PROM,
> for a total of 1024 
> bytes for each envelope. Four 8 bit outputs are produced
> simultaneously with a channel to 
> channel skew of an inaudible 1 microsecond.
> 
> Each ADSR segment has an independent "playback" time control from 1
> millisecond to 20 
> seconds. The shortest total envelope time is 4 milliseconds and the
> longest is 80 seconds. 
> The ouputs are calibrated like the Mini-Wave to 1 volt per octave.
> Two steps = 83.3 
> millivolts = a semitone. So the table programmer in Wave 256 can be
> used to program 
> pitch information using actual note names.
> 
> The Wave256 software used to program the Waveform City and Mini-Wave
> is also used to 
> program the Envelooper. The waveforms in a "Wave" are set up like
> this for the 
> enveloopers four outputs; A1, A2, A3, A4, D1, D2, D3, D4, S1, S2, S3,
> S4, R1, R2, R3, R4. 
> The programming rules are as follows; A(ttack) pages start at -128
> and end at +128, D
> (ecay) pages start at +128 and end at 0, S(ustain) pages start and
> end at zero, Release 
> pages start at 0 and end at -128. Following these programing rules
> produce envelopes 
> with no audible "splice" when the device switches from one segment to
> another.
> 
> The four outputs are mapped two different ways for East Coast and
> West Coast patches. 
> For East Coast use, output 1 controls the pitch of the VCO, output 2
> controls the 
> waveform, output 3 controls the VCF (Boogie) and output 4 controls
> the VCA (Borg 2). For 
> West Coast use, output 1 controls the pitch of the VCO, output 2
> controls the waveform X, 
> output 3 controls the waveform Y  and output 4 controls the lowpass
> gate.
> 
> 8 bits has a fair amount of zipper noise, for pitches we want this
> quantization, but it is a 
> problem for VCAs and other inputs. One of the little known things
> about Vactrols is that 
> they remove zipper noise. So running an 8 bit signal through a
> Vactrol smooths out the 
> steps into continuous function. The VCO will have Vactrols or the
> equivalent on the 
> waveform X and Y inputs to remove zipper noise. The Borg and Boogie
> filters are based on 
> Vactrols and already remove zipper noise.
> 
> I just wanted to post a little note to let everyone know that Wiard
> R&D will continue to 
> produce ground breaking designs not available anywhere else. For
> those REALLY 
> interested I have posted the test PROM file in the files section
> called adsr4.256 Use the 
> Wave256 software to view the segment designs. Please note this is
> just an experimental 
> file to test ideas, NOT the final file which will ship with the
> module.
> 
> 
> 
> 
> 
>  
> Yahoo! Groups Links
> 
> 
> 
> 


http://www.dron.de
http://www.selfoscillate.de
http://www.signalform.de


		
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