Roland JX-3P Filter Resonance Boost Mod DIY: Detailed Walkthrough and Sound Demonstration

video by thesrabbit

follow-up to this post.

"Disclaimer: I cannot be held responsible if you try this out and break your gear or yourself. Please be careful! This mod requires the synth to be powered on with the panel open as you make adjustments to the trim pots. Please do not touch anything inside the synth other than the trim pots, and only touch the trim pots with your trim pot tool. I used a special tool for this, but I think it may be possible to use other tools as well.

This video is meant to show you how I accomplished my particular goal. It does not mean that this is THE correct way, if there is such a thing. I'm a total DIY noob and have never used an oscilloscope before. Please leave a comment if you know something important about safety or want to call me out for anything that I'm doing which is clearly wrong.

Contents:
0:00: Intro
1:35: Preparation and disassembly
3:00: Opening the top panel
4:07: Trim pots

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Korg MS-10 like new in original box SN 132645

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Korg MS-10 in almost mint condition, fully checked out and working 100%.
Synthesizer is 100V version for the Japanese market. I highly recommend a voltage converter for long-term use.
Includes Japanese language overlay (see photo).
The only flaws are some paint buckling and scratches on the bottom of the synth.
Even the nuts on the inputs are clean - often these are corroded or dull by now.
Includes original box with matching serial number and "Korg" stamped styrofoam ends for packing.

No documentation included.

While this is in collectors' condition, it sounds like an absolute beast and deserves to be played! It has the soul of a wild animal. While not as full-featured as its big sibling, the MS-20, and only has one oscillator, it sounds ferocious and is completely capable of some fantastic sounds, from straightforward leads and basslines to crazy sci-fi sound effects."

Additional pics of this SN captured here.

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Korg SQ-10 Analog Sequencer

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

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Hammond Synthesizer Service Manual

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"This manual is complete with schematics, circuit board pictures and part numbers. It is in 'like new' condition."

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Electro Harmonix Mini Synthesizer EH 0400 (Vintage 1980’s) w/ Original Docs

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

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Roland Juno 106S

Note: Auction links are affiliate links for which the site may be compensated.

via this auction

"Superb Roland Juno 106s polysynth in really clean condition. The synth is identical in features/electronics/sound to the 106, with the only addition of a pair of speakers. These can be disabled (if need be) by inserting a jack plug into the headphone socket.

It's been recently serviced, which included:

-Removing the resin coating from the set of 6 chips and then reinstalling, fitting the chips into sockets.
-New memory battery fitted.
-Factory presets loaded.
-Clean/lube of switches and pots.
-New set of front panel tact switches installed.
-Filter calibration.
-New pair of speakers installed.


The synth is in excellent cosmetic condition, with only minor blemishes or marks."

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First Day with the Hologram Microcosm (ft. Arturia MicroFreak)

video by Gabe Miller Music

"I unbox, design sounds, and make music with the Hologram Microcosm and Arturia MicroFreak. This is my first demo of the reverb, delay, and glitch effects unit and I was immediately able to get it and my synth to give me some pretty incredible sequences and soundscapes."

kNoB technology AGNI (VCA, Wavefolder, Distortion, Tone, Feedback, Eurorack) Demo and tutorial

video by kNoB Technology

Follow-up to this post.

"AGNI - is our pride, this is a complex signal processing device that includes: voltage-controlled amplifier (VCA) combined with a Wavefolder, then the signal goes to the Distortion section, which amplifies and distorts the signal, then the signal is filtered by a passive filter and goes to the output amplifier, AGNI also has a feedback unit which provides an output signal to the input of the device.

Time sections:
00:00​​ Intro
00:24​​ Hello and block structure
01:18​​ VCA/Wavefolder
02:24​​ Distortion
03:04​​ Tone
03:27​​ Feedback
04:46​ CV control
06:54​​ Self-oscillation
09:27​​ Square: phase rotation
10:45​​ Sawtooth: waveshaper and folding
11:22​​ Triangle: all like as sine
11:40​​ External sound processing: Drums
12:41​​ External sound processing: Long sounds
13:35​​ External sound processing: Plucked sounds
14:38​​ Thick distorted bass patch"

U-He Hive 2.1 Update: What's New?

video by u-he

"Hive 2.1 brings you:
New filter models and modulation options, 100 new presets, and more!

Download Hive 2.1 here:
https://u-he.com/products/hive/

00:00​ - Intro
00:52​ - New filter types
02:08​ - Stereo filter ‘Spread’
02:25​ - New ‘Mod Noise’ modulation source
02:53​ - Shape sequencer ‘Position’ modulation
03:15​ - Pan modulation for delay and reverb
03:30​ - Scope display of mod matrix outputs
03:42​ - New presets"

TUCKER/80年代の和風シンセサイザー「曙」（あけぼの）どこを触っても和風な音しか出ないこの楽器で作曲する試み。

video by gamakatsu

"A synthesizer for traditional Japanese music made in the 80s.

An attempt to compose with this instrument that only produces a Japanese sound no matter where you touch it"

1973 japanese electronic project KIT （MYKIT 50） GAKKEN学研　マイキット50 ハードオフで見っけた
video by gamakatsu

I didn't realize GAKKEN went that far back. See the Gakken and SUIKO labels below for more. Not sure if that's a SUIKO in the first video above, but it looks like one.

And a non synth video by gamakatsu: TUCKER/ 子供が投げた一斗缶の音をループして音を加えて作曲する試み
video by gamakatsu