MATRIXSYNTH

Modular synthesizer explorations

Published on May 16, 2014 adam dunn·39 videos

"Vortex recording modular synth #tripeze object,"

Tube synthesizer revisited

Published on May 16, 2014 256byteram·133 videos

"I've been working on my tube synth again. It's a voltage controlled, monophonic synthesizer with a linear control input.

The circuit works a lot like a Theremin, though why it outputs a pulse waveform and not a sine wave is beyond me. It's probably the two oscillators interfering with each other.

It works with a reactance tube (a 6BA6, a remote cutoff pentode to give a musical scale from a linear input) modulating the frequency of an LC oscillator (a 6C4) by a few tens of kilohertz across the voltage range. The oscillator runs at a few hundred kilohertz so this frequency is mixed (in a 6AN7A) with a fixed oscillator (also in the 6AN7A). The difference of the two frequencies is extracted and sent to the amplifier. This is what you hear.

For the voltage controlled amplifier, the 6AN7A's screen grid's voltage is controlled to adjust the gain. The high frequency from the fixed oscillator is tapped off and amplified through a dual triode driving an IF transformer. The secondary winding of the transformer is put between the keyboard's lowest note and ground. This doesn't change the DC operation of the keyboard but it injects a high frequency sine wave into it. When a key is pressed, the sine wave is allowed through. The DC level is sent to a capacitor to control the pitch and the AC signal is sent to the other half of the dual triode and amplified through another IF transformer. The output of this is rectified and sent to a capacitor, which drives the screen grid of the 6AN7A.

Getting the thing to stay in tune is a real pain. It's RF so moving any component changes the operating frequency.

I'll draw a schematic up and post it if anyone wants a look."

Introducing Analog Rytm OS 1.01

Published on May 16, 2014 Elektron·45 videos

"OS 1.01 introduces two new machines. BDFM (Bass drum FM) and SDFM (Snare drum FM) are based on linear FM synthesis and endow the Analog Rytm with even more sonic possibilities.

Other improvements brought by OS 1.01 include more copy/paste options and several usability tweaks.

For a full list of changes, see the documentation included with the upgrade zip-file.

Analog Rytm OS 1.01 is available for free download at http://www.elektron.se"

Predator-PL Introduction with Rob Papen

Published on May 16, 2014 Rob Papen·42 videos

Vermona Perfourmer MK II Sequence 05

Published on May 16, 2014 Great mesmo·57 videos

"Vermona Perfourmer MK II Four Voice Analog Synthesizer, fed through a Roland RE-20 Space Echo.Then two Behringer MIC200 Ultragains (Audiophile Vacuum Tube Preamplifier with Preamp Modeling Technology) set to Keyb.
http://www.behringer.com/EN/Products/...
http://www.vermona.com/index.php/en_p..."

Presentation: Nektar Panorama With Bitwig

Published on May 16, 2014 sonicstate·829 videos

"First of a series of in-depth looks at Panorama integration. We start off with a look at how the Nektar Panorama P4 works with Bitwig - the new kid on the DAW block.
Tim takes us through the features of the keyboard and the way it works with Bitwig's unique workflow."