ARP 2600 - duophonic 3620 keyboard

video by O.Z. Hall

"This video explores the possibilities provided with the ARP 3620 keyboard duophonic feature. Interval latching controlled via footswitch is one feature. Another is routing only the CV2 (Upper Voice) control voltage through the Lag Processor, so that only the upper voice has portamento."

O.Z. Hall ARP 2600 posts

2600 Clone Shootout - Korg ARP 2600 FS vs Behringer 2600

video upload by O.Z. Hall

"Korg ARP 2600 FS vs Behringer 2600 - what's the difference?
We'll look at the features in common to each as well as the differences.
Check it out!
If someone offered you either synth (and you could not sell it), which would you prefer to own?

TIMECODE

0:00 - Intro
0:56 - Overview of the 2600 "Modules"
2:11 - 3620 Keyboard Controls
3:43 - VCOs compared
4:55 - Filter, Envelopes, Output, Reverb
7:09 - Preamp, Envelope Follower, Ring Mod
7:37 - Noise, Voltage Processor
7:57 - Sample & Hold, Electronic Switch, Headphone Output
8:55 - Keyboard Controls, Portamento
9:24 - Back Panel, LFO, Kybd CVs, Repeat
10:56 - VCO outputs compared on Oscilloscope
13:17 - My Conclusions and Opinions

Note: Behringer makes another model of the 2600, The Blue Marvin, which like the Korg 2600 FS contains a mechanical spring reverb (vs digital)."

ARP Pro Soloist High Pass (HP) Filter Section Clone by O.Z. Hall

Published on May 14, 2020 O.Z. Hall

"I cloned the ARP Pro Soloist High Pass (HP) Filter section. The output of the high pass filter section goes straight into the 24DB/Oct Low Pass filter on the soloist.
There are 4 - 6DB/oct HP filter circuites at 4 different cutoffs. They are in parallel. The outputs are summed.
This video demonstrates each of the 4 filters in isolation. Next they filters are combined in every combination (limit two filters at a time)."

You can previous posts featuring O.Z. Hall & 5U systems, including an ARP 2600 configuration of a Synthesizers DotCom portable 22 here.

ARP 2600 presets with Sequential Circuits Model 700 Programmer

O.Z. Hall

Left channel audio only on this one.

"The third product from Sequential Circuits was the Model 700 programmer. It allowed monophonic synthesizers like the ARP 2600, Minimoog and ARP Odyssey to have the following parameters preset:
VCA envelope and amount
VCF cutoff, envelope and amount
VCO tuning (for 3 VCOs).
The Model 700 programmer was the precursor to the revolutionary Prophet 5 synthesizers. The Prophet 5 used the same knobs, switches and color scheme.
This video demonstrates this 1970s Model 700 programmer with a reissued ARP 2600."

ARP 2600 plus SwissDaisyDSP Pluck Mode with distortion

video by O.Z. Hall

"The ARP 2600 is providing CV/gate to control the Z506 Swiss Daisy DSP in the new 'Pluck' mode. The Frequency Central MethAmp module provides distortion.

The Swiss Daisy DSP pluck mode uses a Karplus-Strong algorithm to model a plucked string ( think "Rings" ). This plucked string provides a great foundation for driving the MethAmp distortion module.

The Frequency Central MethAmp is a clone of the famous 'Big Muff' distortion pedal used by Hendrix and many others. I could have used the preamp section of the ARP 2600, but the MethAmp also provides tone control, as well as a 'regeneration' control that did not appear on the original Big Muff. The regen can easily cause feedback (frequency controlled by the tone control).

BTW, I love this video on Karplus-Strong synthesis:" [posted here]

ARP 2600 with ARP 2500 ModAmp 1005 in Depth

video upload by O.Z. Hall

"This is a detailed tutorial on Behringer's ARP 2500 ModAmp 1005 module. We used the the ARP 2600 oscillators as inputs so that it would be easy so see the connections. The ARP 3620 duophonic keyboard played a 'key' role in this demo (pun intended)."

ARP 2600 with Euclidean Circles

O.Z. Hall

"The Korg ARP 2600 is augmented by a eurorack cabinet built to support the 2600. The focus is on the Euclidean Circles (v1.9) module and the great rhythms you can easily create with it.

Thanks James Carr for building this cabinet for me!

Technical note. I'm using the Intellijel Metropolis sequencer as a clock source (to start/stop the sequence). The actual sequencing that you hear is from the Behringer 960 Sequential Controller."

ARP 1601 Sequencer with ARP 2600 synth

video by O.Z. Hall

"This is a demo of a 1977 ARP 1601 Sequencer. It drives the ARP 2600 synth.
Digital Delay is provided via the Z506 Swiss Daisy DSP.
About this sequencer.
I purchased this sequencer new in 1977. I sold it to Ken W., a friend, perhaps 10 years later. He has kept it in great condition, but some of the ICs failed. The clock did not work. The sequencing did not work. I repaired it over the period of two weeks."

ARP 2600 with AM2140 EMu Resonant Filter

O.Z. Hall

"This video explores expanding the ARP 2600 with an addition multi-mode filter. This is similar to what one might do with an ARP 2500 with both the 24db/oct Low Pass filter as well as the 1047 Colin multi-mode filter. I hope you enjoy the video"

Analog Metropolis AM2140 Resonant Filters on SynthCube

ARP 2600 plus Modular July Jam

video upload by O.Z. Hall

"This two minute jam features bass from the Korg ARP 2600 FS. A sequence voice is provided by a Behringer ARP 2500 eurorack modules. Percussion is supplied by Mutable Instruments Peaks driven by a Euclidean Circles gate sequencer. The lead is provided by a Synthesizers.com modular plus delay from a prototype version of the Swiss Daisy DSP module by ZebraSynth.net."

ARP 2600 filter magic! #shorts

video upload by O.Z. Hall

"#shorts ARP 2600 is played by a simple sequence (from the 3620 keyboard sequencer). The voice is VCO1 to VCF to VCA with Reverb. The VCF is modulated by VCO2 in low frequency mode. The magic happens when the output of the VCF is routed to the Filter Cutoff Frequency CV input.
The Digital Delay is provided by the Swiss Daisy DSP.
Note that the initial VCF cutoff frequency is a sensitive parameter. Also very sensitive is the VCO1 level in the VCF audio input mixer.
The behavior is different from the Type 1 filter to the Type 2 filter. Both work, but they behave a little differently."

ARP 2600 configuration of a Synthesizers DotCom portable 22

Published on Sep 9, 2018 O.Z. Hall

"This is a follow-up video from my December 2015 video 'ARP 2600 configuration of a Synthesizers DotCom portable 22 cabinet '.

I have added a number of new custom modules which greatly expand the preset capability of the system. Part 1 describes the different modules in the system. Part 2 demos some preset sounds."

ARP 2600 plus digital delay

O.Z. Hall

"This demo shows a Z506 Swiss Daisy DSP in eurorack format patched into the Korg ARP 2600 to finish off the arpeggiated sound with a digital delay and a drum voice. Here's more detail on the Z506: [posted here]

It is also a available in the 5U MU/Dotcom format."

ARP 2600 Sequence Jam

video by O.Z. Hall

"ARP 2600 provides the lead.
Z506 Swiss Daisy DSP provides the 'pluck'.
Intellijel Metropolis sequencer drives the Swiss Daisy DSP.
Frequency Central MethAmp provides overdrive as well as a voltage controlled tone with "regen"eration (resonance/Q).
ES FV-1 modules provide digital delay and reverb.
This module is based on the Electro-Smith.com FV-1 submodule. RecklessExperimentationAudio.com provided the prototype PCBs and panels. Thanks Mikhail!

I hope you enjoy this jam."

See additional posts below, here.

ARP 2600 + Dual LFO Sequence Demo

video by O.Z. Hall

"My friend James Carr built a cabinet for Eurorack modules to fit beneath my Korg ARP 2600 FS. It has two rows of 126 HP. The size is the same as three rows of 84 HP, like the Doepfer 9U cabinet.
I'm demoing a technique for generating a sequence by mixing the output of two LFOs. The output is quantized for easy tuning. The trigger input to the quantizer controls when the quantizer output voltage is updated.
I hope you enjoy this demo."

ARP 2600 clock with divider

O.Z. Hall

"This video demonstrates a technique for using the internal sample and hold clock on the ARP 2600 as a gate. In addition, you can use the electronic switch as a divider, to get a clock at 1/2 the rate of the internal clock.

That technique plus the duophonic keyboard creates a very playable voicing that simulates a 3 voice chord."

ARP 2600 w GRP R24 Sequencer + Swiss Daisy DSP

video upload by O.Z. Hall

"The GRP Synthesizer company's R24 sequencer is driving two voices on the ARP 2600 and a third voice provided by the ZebraSynth.net Swiss Daisy DSP module, in "pluck voice" mode, with delay and reverb.
I'm using several features of the R24 including:
3 separate sequences (CV/Gate out ; MIDI also available)
Some sequences use the "ratchet" feature to double gate a single step.
The second row is only 6 steps, to provide a poly-rhythm for greater complexity (less monotonous ).

Thanks to my long time friend Rod Scott for loaning me the GRP R24. Check out his channel:

https://www.youtube.com/c/RodScott-Ni..."

Arp 2600 with Wavolver II waveshaper module by Ian Fritz

video by O.Z. Hall

"This is a demo of the Ian Fritz Wavolver II waveshaper driven by the triangle output of VCO2 on the ARP 2600.
Ian Fritz has a great basic video on this module. [3rd video here from 2011]

I hope you enjoy this video!"

ARP 2600 Ring Modulator as VCA

O.Z. Hall

"I don't want to flood the channel, but I thought this might be interesting to review. On the ARP 2600 I'm using the Ring Modulator as Voltage Controlled Amplifier (VCA). Normally the Ring Mod is used to get "clang" tones for bells, or to get the 'X-Wing fighter' radio voice. It's also usable as a VCA. In fact it's kind of "super" vca because it is a "4 quadrant" multiplier vs the normal VCA which is a 2 quadrant multiplier (google it ... interesting stuff)."

ARP 2600 configuration of a Synthesizers DotCom portable 22 cabinet

Published on Dec 27, 2015 O.Z. Hall

"This is a brief overview of a DOTCOM modular system in a Portable 22 cabinet. It was configured to have the capabilities of an ARP 2600 (minus the pre-amp, envelope follower and voltage processor sections). It features a normalized signal path and a "programmer" which supplies a mix of envelope generator, LFO, bias (cutoff) for the VCF. It also provides voltages to control the resonance, tuning of VCO3, Envelope generator controlling the SYNC effect (from the IAN Fritz 5 Pulser), and the "Fat" CV for the Synthia Saw Animator module."

http://synthesizers.com