Improvisation VI – Polyrhythmic Derailings

This is another analog modular improvisation with added drums (Toontrack EZdrummer) and some Mellotron (GForce M-Tron) choir sounds. Drums and choir chords were prepared in Ableton Live and there’s quite some interaction between the things I do in Live and on the A-100 (thanks to Kenton Pro 2000,  Doepfer A-119 and Steinberg MR816).

The bass line is made of two A-110 VCOs (both with sawtooth waves, same octave) put through an A-108 Ladder Filter (24 dB out), doubled by another two A-110s through another A-108. The two voices are put in opposite stereo positions. Both voices share the same A-140 ADSRs.

Later, there is a high-pitched voice, which is a single A-111 VCO (triangle wave) put into an A-137-2 Wave Multiplier II and into two chained A-106-1 Xtreme Filters: the first one is set up as highpass, the second one as lowpass. Both filters are controlled by the same A-142 VC Decay. The sequences were controlled by (a) the A-148 S&H fed with coloured noise (bass line), put into an A-156 Quantizer and (b) the arpeggiator of Live (high pitched line). The Mellotron midi notes are used for transposing the A-156 via Kenton interface (last note priority) and for the arpeggiator as well.

Triggers for the bass line are derived from Live’s sequencer clock put through A-160 Clock Divider and then into an A-165 Trigger Modifier. Original, inverted and +/- Trigger from the A-165 are switched in an A-151 Sequential Switch (which is controlled by the gate output of the A-142 that controlls the high pitched sequence). Complicated? The drums were fed into an A-119 External Input where we get the trigger signals to control the A-142. No sound processing of the drums in the A-100, that’s just Live’s built-in tools.

Here we go:

Track length is 04:12.

Have fun,

Andreas

Improvisation V – A Tiny Drum Machine

Of course you can do drum machine sounds on an analog modular synthesizer. Easy. However, it is somewhat strange to use big parts of a huge machine for some sounds easily available on much cheaper hardware. It is fun, anyway. There are four percussion sounds here:

  1. A bass drum, created with a resonating A-106-6 Xpander Filter (12 dB output), sent through an A-137-1 Wave Multiplier I for some nice distortion.
  2. A snare drum, created witrh some coloured noise from an A-118 Noise generator, sent through an A-106-5 SEM Filter and then through an A-137-2 Wave Multiplier II for a fat rich tone.
  3. A percussive sound, created with an A-117 „808 noise“ sent through an A-124 Wasp Filter and (after the VCA) through an A-188-2 Tapped BBD for more „ringing“ sound.
  4. Another percussive sound, created with some A-118 white noise, sent through an A-105 SEM Filter.

All percussive sounds are controlled by four A-140 ADSRs, controlled by two A-155 Sequencers (triggers and filter CV sequences). Everything is synced via Midi from Ableton live. Here I use a simple arpeggio to control the bass voice: three A-110 VCOs sent through an A-108 Ladder Filter (24 dB output). That’s it, recorded live, no overdubs, just a few effects from Ableton and mastering in Cubase.

Here we go:

Track length is 06:59.

Have fun,

Andreas

Doepfer A-106-5 SEM Filter example

At first glance, the A-124 WASP and the A-106-5 SEM Filters almost look like siblings (well, probably like Danny DeVito and arnold Schwarzenegger in „Twins“…) Although quite similar in functionality, they are very different beasts soundwise. The A-106-5 is based on the filter of the Oberheim SEM. It has a very smooth and pleasant sound, quite „retro“ (and can be used nearly everywhere). Technical Details on the Doepfer Homepage:

http://www.doepfer.de/a1065.htm

We go into the filter with three A-110 VCOs (sawtooth waveforms, one VCO is tuned down 1 oct). Medium input level. The VCOs are controlled by an A-155 sequencer, the filter is modulated by an ADSR envelope and a very slow sine wave LFO. We start with no resonance. I manually blend from lowpass to highpass. Then (via A-134-1 Pan) from LP/HP output to bandpass output of the A-106-5. Now I start to increase filter resonance up to maximum value. Back to LP/HP output, here I blend from HP to LP again and finally reduce the resonance to zero – that’s where we started. Here we go:

http://www.andreaskrebs.de/assets/media/A-106-5.mp3

Andreas

Doepfer A-124 Wasp Filter example

The A-124 Wasp filter quite interesting. It once was a budget filter design (in this respect – not technically – comparable to the Korg MS 20 filter maybe?) which led to some strange distortions and other stuff. Technical details can be found at Doepfer’s homepage:

http://www.doepfer.de/a124.htm

As usual, we go into the filter with three A-110 VCOs (sawtooth waveforms, one VCO is tuned down 1 oct). Input level is cranked up to maximum. The VCOs are controlled by an A-155 sequencer, the filter is modulated by an ADSR envelope and a slow sine wave LFO. We start with no resonance. Since not everything is CV-controllable at the A-124, I manually blend from lowpass to highpass. Then (via A-134-1 Pan) from LP/HP output to bandpass output of the A-124. Now I start to increase filter resonance up to maximum value. Back to LP/HP output, here I blend from HP to LP again and finally reduce the resonance to zero – that’s where we started. Here we go:

http://www.andreaskrebs.de/assets/media/A-124.mp3

Andreas

Doepfer A-137-2 Wave Multiplier II example

The A-137-2 Wave Multiplier II is a very nice module which can do very subtle as well as quite extreme things. Here’s an example with an A-111 (triangle wave) and four independent LFOs (triangle waves from an A-143-3):

http://www.andreaskrebs.de/assets/media/A-137-2.mp3

It begins with slight modulation of a single quite slow LFO, then the other LFOs were added. Increasing CV levels and LFO frequencies. Then I switch all LFOs to high speed, with maximum modulation depths in the A-137-II.

Technical deatails can be found at Doepfer’s homepage:

http://www.doepfer.de/a1372.htm

Andreas