101-VCO Version 2 Roland SH-101 Oscillator Adaptation + RD-6 [Demo 1 No ...

101-VCO has returned to the fold: the same great sound, simplified and improved tuning, and having all the individual outputs without need for an expander module. All in 12HP. Headphones or good monitors recommended.

Check my Reverb store for 101-VCO availability

101E Output Expander for 101-VCO Now Available

Introducing my 101E Output Expander for the 101-VCO.
101E adds buffered, individual wave outputs from the 101-VCO.
I will show how to interconnect them.
And just a few things you can do with the expansion.

Links for more information...
101E
101-VCO
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SH2-VCF Reporting For Duty! Eurorack Filter Module Demo #2

Following up on my prototype demo, the SH2-VCF is finished and reporting for duty. My SH2-VCF is a filter adaptation of the Roland SH-2 analog synthesizer filter using BA6110 op amps in place of the extinct BA662 chips of the original.

In this video I'll keep the talking to a minimum and explain how I resolved the BA6110 issue. And then put the filter through some paces including a massive kick drum, and an example track using TWO of these filters.

Be warned - some huge resonant kick drums ahead!
Audio recorded direct to Tascam DR-05 except the last part which has some delay.

0:00 Bass pad w/ two VCOs.
0:27 How I resolved the BA6110 issue.
1:35 Hand crafting these beautiful modules.
1:48 Bass pad + LFO + Resonance
2:04 Brutal Self-Osc Kick Drums (Filter Only)
2:50 Brutal Self-Osc Kicks through VCA (Bastl Skis)
3:25 Two filter Simple Track example, Bass: DNA Symbiotic Waves Delay: Timefactor, Kick: Tonus VCF

Oscillators - Pittsburgh Synth Box + Rozendall CEM3340 VCO
Envelope Contours - 2xADSR dual envelope
VCA - Bastl Skis
Sequencing - Arturia Beatstep Pro Pitch CV + gate

Check out my SH2-VCF and other cool modules available in my Reverb Store

I Auditioned the Roland SH-01A Synthesizer Today

I had a brief audition with the new Roland SH-01A boutique synthesizer today. It's a DSP simulation of one of the classics from the 80s: the original SH-101 analog monosynth. How does it sound? Is it worth the money? Did I buy one today? Patience young grasshoppa, all will be revealed.

While Roland's proprietary DSP has gotten the surname ACB it means nothing more than Analog Circuit Behavior. This has given Roland a string of hits lately including the TR-09, which many agree is a superb emulation of the coveted TR-909 drum machine. Sitting down with the SH-01A for the first time I brought some high expectations for the sound - having recently owned and then sold, a real SH-101. And I must say the sound does not disappoint. I really go for the filter on this one, so classic, so Roland. The SH-101 is one of my favorites with pulse width modulation and sub-octave added. The portamento sounds really nice with the sequencer sequencer. I had the LFO modulating the filter w/ the random waveform. Roland really has gotten so close to the sound of their counterparts. Honestly, I only used mono mode. For me, POLY mode on this one is a bit of a sacrilege. Is it worth the moeny? I should say so! A fully working SH-101 would cost $1000 and still may require periodic mainenance, so that makes this one a no-brainer. Especially since the sound is so darn close. Did I buy it today? Well, let me answer that with a statement. Make that two statements...

The first: the SH-01A does NOT have INPUTS for CV/Gate - it does have the OUTPUTS - but not the inputs. If you're looking for something that can play nice w/ my Eurorack like I am, you would need a CV/gate-to-MIDI converter. Probably something costly by Kenton costing over $300. That puts you in the ballpark of getting a real, perhaps disgraced, SH-101 unit needing work. And second: there is NO external input for the filter. There IS a mix input for chaining audio between multiple units, but NO filter INPUT. It would have been nice, but the original SH-101 didn't have one either. But that filter is so nice! Did I buy it anyway? While I was content to stroll out empty handed I still yearn for that sound. I do have a birthday coming up, perhaps it could still make it to the studio. IF not, next year I can get one used for cheap. We'll see. Oh, and not to forget Behringer did tease something interesting recently. -g PS - I went back the next day and got it. Perhaps a proper review is coming on?

Korg MS-20 Teardown: Pulse Width Modulation Install

The vintage Korg MS-20 monophonic synthesizer comes with a pulse width knob, but no way to patch a modulation to it. In this video I teardown the MS-20, and install a Pulse Width Modulation routing.

My PWM will come from the MG/T.Ext circuit that is already present on the synth. 90% of the time I want to use the MG, AKA the LFO, to modulate the Pulse Width. So all I will do is add a small pot and current limiting resistor for routing the MG/Total circuit to the Pulse Width.

What about the other 10% of the time I don't want MG going to PWM? Well the MG is only normalled to the Total/External jack. If something is patched into the Total jack, it will override the MG and be routed to the new PWM pot. It behaves exactly the same way as the MG/Total pots for Pitch/HPF/LPF. Pretty sweet.

At the end of the video I patch various things to modulate the Pulse Width. Stay safe, don't electrocute yourself, and be sure to unplug the synth at all times while doing work inside the unit.

Korg MS-20 Mult-Track Demo #4

This is a Multi-Track demo with all sounds coming from the Korg MS-20 analog monophonic synthesizer. Going for some aggressive Acid House sounds today, putting up some of the patches of these sounds, and a tribute to some bands that have used MS-20 in studio or on stage.

The track is called No Refunds. It is inspired by the VCA noise controversy that apparently spawned a few synth returns in music stores. I shall not be refunding mine. :)