Formanta UDS VS Formanta Rockton

video upload by Alexey Taber

Rmif ELSITA - repair/mod/midi

video upload by Alexey Taber

WERSI BA-900 repair/midi

video upload by Alexey Taber

Bass Bot.mod with BA662

video upload by Alexey Taber

via AMSynths:

"The BA662 is a custom made DC controlled variable transconductance amplifier (or OTA) that Roland had manufactured by Rohm from 1978 and is now obsolete and very expensive. There are two types of chip with different suffices; the A version has been selected for lower offset than the B version. They are further classified by gain/gm. The BA662B can only replace another BA662B, whilst an A can be used in either application.

To quote Roland from the 100M Service Manual: 'color has great importance in the circuits of some models'. However there is nothing mystical about the sound of the BA662, it is just a reasonable good OTA chip which is often carefully matched and selected."

And via Sunshine Jones:

"The Roland BA662A VCA chip is the Voltage Control Amplifier IC from the Roland SH-101, TB-303, Juno-60, JX-3P etc. which is a part of what makes it sound so wonderful. These can also be found in the Jupiter-4, the Jupiter-8, and MKS-30,50 and 80. They have counterparts – The Roland BA662B (B stock versions of the A) and also a cousin IC the BA6110 which is similar, and looks virtually identical under a scope, but the power comes from negative rather than positive, and so it won’t work exactly the same way."

rare Synton Syrinx after repair and mod

video upload by Alexey Taber

Check out the AnalogFX SER-2020 for a modern take on the Synton Syrinx.

Roland System 100.after repair and midi instaled

video upload by Alexey Taber

AELITA .rare soviet synth after repair

video upload by Alexey Taber

Estradin-314 - Solaris - after repair witn Vermona Re-Tube

video upload by Alexey Taber

Polivoks Pro sequenced + Cooper FX Generation Loss

video upload by alternatingbitmusic

"Alexey Taber and Alex Pleninger Polivoks Pro sequence via Doepfer Dark Time run though a few pedals for some extra coloring (not that the Polivoks Pro needs any!)."

Elektronika EM-25 produced in the Soviet city of Kherson.Another one repaired and installed midi

video upload by Alexey Taber

rare soviet transistor organ Yunost-70 after repair/midi installed play with vintage EH Small Stone

video upload by Alexey Taber

Polivoks. repair/croped keyboard/midi installed

video upload by Alexey Taber

rare soviet string-organ Elektronika Em-04 test after repair and instal midi with some CC controls

video upload by Alexey Taber

YAMAHA SS30 - installing midi,part II

video upload by Alexey Taber

part 1 here

YAMAHA SS30 - installing midi

video upload by Alexey Taber

SN 1695

Part II here

ECHOLETTE NG51 test after repair with Electronika EM-25

video upload by Alexey Taber

Elektronika EM-20. test after repair and midi instalation

video upload by Alexey Taber

Arp Odyssey II.test new midi with dual voices

video upload by Alexey Taber

another Alice 1387

video upload by Alexey Taber

Polivoks Pro (Reissue) full demo

video upload by manmade madman

"[[[ Поливокс ]]]
In 2017, the Polivoks Pro was announced and began shipping. This was a joint effort between Alexey Taber and Alex Pleninger, with supervision
from the original creator, Vladimir Kuzmin.
It was designed from the original schematics using NOS Soviet parts, and handmade.

Only 100 units were built.

This is a demo of my unit, which I feel is currently the best Polivoks version available. I am controlling it via CV/Gate from the SH-101.

There is no external processing whatsoever.

Normally I run the SH-101 thru the input of the Polivoks. During the video, the SH-101 volume was off. When no cable is inserted, the highest left knob controls input gain. Part way through the video, I remove the cable.

0:00:00 Intro!
0:01:50 raw oscillators in drone mode
0:03:11 LFO modulation
0:03:20 Pulse Width Modulation (only on OSC 2)
0:04:35 Portamento
0:05:25 White noise through filter
0:05:40 Bandpass filter
0:06:23 Looping envelopes
0:07:30 Sequenced
0:09:09 An Accordion?
0:11:30 FM from audio rate LFO
0:12:50 A thick bassline
0:13:30 something something bassline2
0:15:10 same thing, but make it triangle, cross mod FM
0:15:51 back to drone, Sample & Hold
0:17:35 make it squelchy
0:20:00 make it acid
0:21:38 Pull the input cable, showing internal feedback
0:22:58 finally, a new sequence
0:26:46 Looping envelopes
0:28:00 Lets turns everything on max!

While this is intentionally not a musical demo, it is an overview of most of the features. It should demonstrate to you what it could sound like and whether it fits your music. This is not for everyone, but I still feel this is the best version available today. Let me know your thoughts in the comments!

Previously in 2013, I made this demo with an original Polivoks: [posted here]

Later in 2015, I made this demo of the Harvestman/Industrial Music Electronics Polivoks Eurorack modules: [posted here]"