Showing posts with label PWM. Show all posts
Showing posts with label PWM. Show all posts

Thursday, March 31, 2016

New Doepfer High End VCOs A-111-2, A-111-3 and A-111-4 Thru-Zero Announced

Doepfer has announced two new High End VCO's at the Superbooth event in Berlin (March 31st - April 2nd, 2016)

The A-111-2 is based on the CEM3340 Rev G chip
There was a close cooperation between Doepfer and OnChip since 2015 regarding to the new re-issue of the CEM3340 and they received the first samples in January during NAMM for development.
The first production batch of the CEM3340 Rev G arrived 2 weeks ago and the production of the A-111-2 has started during the next few days (they are still waiting for the latest front panel and pcb samples). 
Doepfer expects the first modules to be finished around the end of July/August. 
The A-111-3 is also based on the CEM3340 Rev G ,and Doepfer is working on a Thru-Zero VCO based on the CEM3340 Rev G too (module A-111-4).

The Doepfer A-111-2High End Voltage Controlled Oscillator II is the successor of the obsolete High End VCO I A-111-1 and here are the most important features of the planned module:

Triangle core, min. 15 octaves pitch range (typ. 0.5Hz - 20kHz)
perfect 1V/octave tracking over min. 12 octaves (typ. 5Hz - 20kHz)
Exponential frequency controls and inputs:
Tune (~ 1 octave range)
Fine (~ 1 semitone range)
A-111-2 Prototype June 2016
Octave (range switch with 6 positions)
1V/octave CV input
XFM input with attenuator
access to bus CV (via jumper, optional)
Linear frequency controls:
LF (manual linear frequency control: fully CW = standard setting for usual VCO applications, fully CCW: close to 0Hz frequency)
LFM input with attenuator, DC coupled

Pulsewidth controls for rectangle output:
PW (manual pulsewidth control from 0%/output = fixed at "low" state up to 100% / output fixed at "high" state)
PWM input with attenuator
Hard Sync input
Soft Sync input
Waveform outputs:
Sawtooth
Rectangle (with PWM)
Triangle
Sine
Nearly "perfect" waveforms (no glitches)
High end triangle to sine converter with excellent sine waveshape (thanks to Tim Stinchcombe who recommended this circuit)

14 HP Width
Price: about Euro 250.00
Available: spring/early summer 2016

The other new High End VCO  is the A-111-3 High End Precision VCO with a panelwidth of just 4HP.
Essentially it's the same basic circuit as the A-111-2 but with reduced features:

A-111-3 High
End Precision
VCO
Triangle core, min. 15 octaves pitch range (typ. 0.5Hz - 20kHz with appropriate external CV)
Perfect 1V/octave tracking over min. 12 octaves (typ. 5Hz - 20kHz)
Exponential frequency controls and inputs:
Tune (~ 1 or ~ 10 octaves range, selectable via internal jumper, maybe different ranges in the final version)
1V/octave CV input
XM input with attenuator
access to bus CV (via jumper, optional)
Linear frequency controls:
LM input with attenuator, DC coupled


Pulsewidth controls for rectangle output:
PW (manual pulsewidth control from 0%/output = fixed at "low" state up to 100% / output fixed at "high" state)
PW input (without attenuator)
Sync input (selectable hard or soft sync via internal jumper)

Waveform outputs:
Sawtooth
Rectangle (with PWM)
Triangle
Nearly "perfect" waveforms (no glitches)
Only 4HP wide panel

Price: about Euro 150.00
Available: spring/early summer 2016

All features, specifications, prices, date of delivery are still without obligation
Source: http://www.doepfer.de/home_e.htm

Thursday, September 03, 2015

Doepfer A168-1 PW/PWM-Generator Announced

Doepfer Announced another new module last week...

Module A-168-1 is a pulsewidth modulation generator (PWM Module).
It derives a rectangle signal with adjustable pulsewidth from an external triangle, sawtooth or sine wave. 
The external signal can be an LFO, VCO or any other signal with falling/rising slopes (e.g. ADSR). In addition the pulsewidth can be modulated by a CV signal (e.g. LFO or ADSR). 
The typical application is the generation of a rectangle signal with PWM from VCOs or LFOs which do not yet have this feature (e.g. A-110-4, A-145, A-147-2, A-143-4, A-143-9).

The module is equipped with these controls and in/output:
- Manual PW control (PW)
- PWM CV Input with attenuator (PWM)
- Signal input (In)
- Output with LED control (Out)
- Inverted Output with LED control (/Out)
- Internal trimming potentiometer for PW (is adjusted for symmetrical 50:50 rectangle when the manual PW control is at center position)
- Internal trimming potentiometer for PWM range (is adjusted so that the manual PW control covers the full PW range 0 ... 100%)
- The trimming potentiometers are required to adjust the module for best operation for signals with different DC offsets (e.g. unipolar/bipolar signals) and different signal levels.
Normally the module is assigned to another module because the trimming potentiometer have to be readjusted when the input signal changes (unless the signals have nearly the same DC offset and level)

(planned for November 2015, price ~ Euro 50.00, price and release date are still without obligation)
Source: http://www.doepfer.de/a1681.htm

Wednesday, October 01, 2014

Medic Modules Cranial Saw - Advanced VCO / SUB Eurorack Module Demo by Rezfilter

Medic Modules Cranial Saw Eurorack Module
rezfilter made a nice video demonstrating the features of the 38HP wide Medic Modules Cranial Saw.
The Cranial Saw is a dual VCO
with Glide, Sync, Sub Oscillator, Pulse Width Modulation, Mixer and Cross Modulator.

" It features two discrete component VCOs based on early 1970s circuits so they sound very vintage and are full of character.

The dual VCO performs best in mid to low range, and combined with the Sub-Osc, produces huge, powerful sounds.
The main pitch CV input goes through a Glide / portamento circuit.
There are modulation CV inputs with attenuators. Also, VCO2 has its own CV Mod input.
Each VCO has a Pulse Width slider and PWM CV input sockets.
The VCOs also have Sync.
Cross modulation is possible by taking the output of say VCO1 and patching this to VCO2’s Mod CV input.
The built in mixer allows the two VCOs and the Sub-Osc to be mixed via their own attenuators.
The mixer has its own audio output of course, but the VCOs and Sub-Osc also have pre-mixer, fixed level individual outputs.
The two VCOs each can be switched between Saw or Square waveforms.

VCO1 can be set to ‘Freerun’.
This means it will not track the incoming pitch CV.
VCO1 can be disconnected from the Glide circuit.
Features such as Freerun, and the Glide disconnect of VCO1, as well as individual Mod CV for VCO2, allow a great range of sounds and weird effects to be produced when cross mod is patched, or Sync used.
A lot of thought has been put into all this. Please take a look at the videos on Analogue Solutions web site and YouTube channel for examples. The idea is to allow production of a wide range of VCO sound effects with the minimum amount of patched, though, of course, patching can be done.
All sliders incorporate a LED in their shafts. The Tune slider will flash in accordance to the pitch of VCO1."

More info via http://analoguesolutions.org.uk/medicmodules/wp/

Video: Medic Modules Cranial Saw - Advanced VCO / SUB Eurorack Module

" The Cranial Saw is an advanced VCO / SUB eurorack module with glide, featuring a whole range of flexible modulation possibilities to appease even the most demanding musicians and euro enthusiasts."

Uploaded by rezfilter