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Showing posts from March, 2016

Doepfer A-184-2 Voltage Controlled Crossfader / Triangle-to-Sine Waveshaper

More News fom the Superbooth event in Berlin (March 31st - April 2nd, 2016)

The A-184-2 Voltage Controlled Crossfader / Triangle-to-Sine Waveshaper is the combination of two functions and planned primarily as an expansion module for VCOs or LFOs (e.g. A-110-1, A-110-2, A-145, A-147-2).
The upper section is a very precise triangle-to-sine converter (thank's to Tim Stinchcombe who recommended this circuit).
It can be used to convert any triangle waveform into a (nearly) perfect sine.  The converter is much better than the simple diode converter used in the A-110-1, A-111-1, A-145 and A-147-2.  Two trimming potentiometers are used to optimize the sine shape.  The converter should be assigned to one VCO or LFO because the trimming potentiometers have to be re-adjusted if the input level or DC offset of the input signal changes.  If the trimming potentiometers are deliberately mis-adjusted it can be used also as a waveshaper for non-sine waveforms (e.g. sine-shaped at the top of the sig…

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 (…