MATRIXSYNTH: Search results for Pro 2

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Showing posts sorted by date for query Pro 2. Sort by relevance Show all posts

Monday, April 06, 2026

Huge classic synth collection

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


via this Vemia listing

Click the auction link on top when you get there for additional listings.

"This collection of vintage synthesizers has grown with me for years. Most all of these instruments have been used on many projects, including VeggieTales, a variety of remixes, and many PlayStation video games and marketing and promotional discs. Most recently they were used on the Mass Effect Andromeda video games soundtrack. They have also been sampled and are part of the SoundVault Collection and the Kurzweil Analog Collection for the K2000 series samplers.
VEMIA note: to forestall many inquiries, The seller’s idea is that he wants to sell it as a whole. That may or may not work out in this auction. If it doesn’t, obviously he’ll be free to do whatever he wants after the auction finishes.

It all works. Everything has been kept in a clean, smoke-free, climate-controlled studio. I have always fixed things myself, so everything is operational and sounding great. I have repair notes on the synths that received attention, though most of them have worked great over the years, without much need for repairs. There are also several MIDI to CV converters so they can all be controlled by computer, plus cables if desired. And a few have cases and manuals.

ARP 2600 with lid but no keyboard. Pictured with broken slider and missing caps, but I believe I have them. ARP Odyssey (White) ARP Odyssey (Black & Gold) ARP Odyssey (Black & Orange) ARP Avatar (Original with pickup) (No original knobs, but early rubber caps if you want) ARP Avatar (CMS modded with patchpoints, filter, and envelope) (No original knobs, but early rubber caps if you want)

Chroma Polaris

Crumar DS-2

EDP Wasp

Electro Harmonix Super Space Drum Electro Harmonix DRM 32 Digital Rhythm Matrix

EML 101

Mini Korg 700S Korg Mono/Poly Korg MS-20 (Original Korg Filter) Korg SQ-10 Sequencer Korg Poly-Six Korg Trident

Moog Liberation with rack power, cable, and case Moog MiniMoog Moog MemoryMoog Plus with MIDI and case Moog MicroMoog Moog MultiMoog Moog Opus 3 Moog Prodigy Moog Sonic Six (The case is poor, but the synth panel looks great) Moog Taurus with case

Oberheim Matrix-6r Oberheim OB-1 Oberheim OB-8 with Page 2 and MIDI Oberheim OB-SX (This one is probably in the worst physical condition of them all) Oberheim Xpander

Rheem Kee Bass

Roland CSQ-600 Digital CV/Gate Sequencer Roland JP-8080 Roland Jupiter-4 Roland Jupiter-6 with Europa and original box Roland Jupiter-8 with Encore MIDI Roland JX-8P Roland MKS-7 Roland MKS-30 with PG-200 Roland MKS-50 with PG-300 Roland MKS-70 with PG-800 Roland MKS-80 with MPG-80 Roland MSQ-100 sequencer in box Roland SH-1 Roland SH-2 with case Roland System-100 Model 101, 102, & 104 Roland System-100m D Block Roland System-100m Phaser and Sequencer Block Roland System-100m 104 Polyphonic Keyboard Roland TB-303 with Sequentix MIDI and Filter CV

SCI Max SCI Pro-One SCI-Prophet-5 SCI Prophet-600 with GliGli

Star Instruments Synare 3 Star Instruments Synare 4 Star Instruments Synare Sequencer

Yamaha CS-30 Yamaha SK-20

Encore Expressionist MIDI to CV/Gate Kenton Pro4 CV/Gate and DCB and Wasp JL Cooper MIDI IO 8 ch MIDI to CV/Gate

Standtastic wall-mount arms plus cables if you want them."

Friday, April 03, 2026

10 Pro Tips for HUGE Bass Sounds (for any synth)


video upload by Starsky Carr

00:00 Intro to the Form 50 Bass Patch Bank
00:46 Simple is often the most punchy
01:52 Using resonance for "Acid" tones
02:25 Adding a second oscillator for "Reese" style bass
03:36 Changing oscillators by an octave for extra punch
04:37 Using intervals (Fifths and Thirds) for more harmonics
07:28 Adding LFO modulation to the filter or frequency
10:25 Using Pulse Width Modulation (PWM) 1
11:55 Dirtyfying the sound with Audio Rate Modulation
15:31 Using the Feedback circuit and adding Noise
20:32 Creating sub-bass with a self-oscillating filter
22:32 Some Examples

"Want to create powerful, professional bass sounds on any synth? In this video, I break down 10 essential bass sound design techniques you can use right away — whether you're using hardware or software.

Starting from simple waveforms to complex modulation, FM, PWM, feedback, and self-oscillating filters, these techniques will help you design everything from deep sub bass to acid lines, reese basses, and gritty modern tones.

These are the exact methods I used to create 50 bass patches — and once you understand the principles, you can create hundreds more.

Thursday, April 02, 2026

Siel Keytek CTS 2000 ultra rare Crosstable Synth + Original Case + Cartridge

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


via this Reverb listing

Demo video in the listing previously posted here (don't miss it).

"Ultra Rare SIEL Keytek CTS 2000 Crosstable synthesizer! (Serial N.049!)

I made a DEMO VIDEO to show how sounds this beauty (check it below on the gallery)

100% perfect working conditions

SERVICED by pro tecnician

comes with

- its original case

- cartridge


Technical Info:

The Keytek CTS 2000 is a digital synthesizer with analog resonant filters. It has 2 oscillators per voice with 8 voices and analogue CEM 3389 filters. The same as in the Waldorf Microwave I or Prophet VS. A mix of Ensoniq and PPG Wave.

Additionally it features Cross Table Synthesis which is described as wavetable synthesis with 333 digitally sampled waveforms. You can control up to 6 wavetables per voice with complete analog processing for each voice including 24db per octave filter. 2 envelope generators with up to 5 parameters and 3 LO's. 6 data entry slider for real time editing of all parameters."

Kaona Sisyphus V2: Experimental Textures


video upload by Kaona Modular Music

"Quelques variations expérimentales autour des nouvelles patterns de Sisyphus. Nous avons rendu la version 2 beaucoup plus malléable en traquant les glitchs, les craquements et les auto-oscillations les plus violentes. En revanche, nous avons conservé, et même renforcé, tout ce qui faisait de Sisyphus un instrument de recherche et d’expérimentation pour toutes les musiques, même les plus expérimentales !
Plus d'informations ici :
https://www.kaona.fr/index.php/fr/pro...

A few experimental variations around the new Sisyphus patterns. We made version 2 much more flexible by hunting down glitches, crackles, and the most violent self-oscillations. At the same time, we kept — and even enhanced — everything that made Sisyphus an instrument for research and experimentation across all kinds of music, even the most experimental.
More information here:
https://www.kaona.fr/index.php/en/pro..."

Sunday, March 29, 2026

Sequential Pro-3 // Tweaking Factory Presets F001-F025 // PT 2 // No Talking


video upload by LESINDES

"Sequential Pro-3 // Tweaking Factory Presets F001-F025 // PT 2 // No Talking
Unpublished footage from 2020"

Additional parts

angine de poitrine - sarniezz (modular synth cover)


video upload by Jonathan MacKenzie

"angine de machine?

all sequenced from logic, lots and lots of pitch bend automation... midi cv mostly coming from expert sleepers fh-2, including one converter that's just velocity information for the hihats and one that's just a monophonic gate with no pitch (for the dfam). the configurability of the fh-2 is astounding

drums:
squid salmple with mostly linn samples, swapped in a 909 ride and 808 cowbell. gates from beatstep pro with aforementioned hihat velocity from the fh-2

bass:
mb2s all by itself (including midi conversion)

riff that mostly follows bass:
plaits (waveshaper algo) through tiptop forbidden planet though obne screen violence (disabled at first)

minor 2nd thing:
qu-bit surface in one of the e piano modes

riff 1:
qu-bit chord v2, a fair bit of malarky going on to get the right flavour of duophony. everything's kinda duplicated so at first it's just the first two oscillators then it gets doubled

riff 2 (first new riff in 4/4):
surface again, i switch it to monophonic during the stabs

riff 3:
qu-bit aurora running a dumb little oscillator firmware i wrote a few weeks ago (my first and so far only foray into writing dsp). ran it through after later stairs (stereo filter) with different lfos modulating left and right to move it around a bit. midi from beastep pro (this was the last voice i added and had used up all the outputs on the fh-2 and expander. still had the other sequencer on the bsp so i guess i could've added one more voice)

klek de machine:
dfam

--

the arrangement is slightly shorter, where everything's live rather than looped i can only add layers as long as i can add voices so i focused on what seemed like the more important ones. and while i spent a long time trying to figure out all the parts i'm still not quite sure what the bass (and guitar part that mostly doubles the bass) in the last section is doing. pretty sure i'm pretty close though.

--

#eurorack #modularsynth #microtonal #anginedepoitrine"

Wednesday, March 25, 2026

SEQUENTIAL TRIGON-6 POLYPHONIC ANALOGUE SYNTH (DESKTOP)

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


via this listing

Additional Signal Sounds listings

"We say...
A pre-owned Sequential Trigon-6 in very good condition. It comes with original packaging and power cable

Manufacturer's description
Experience the Power of Three Oscillators and a Ladder Filter with the Trigon-6 Module

The Sequential Trigon-6 desktop module delivers the same massive sound and hands-on sonic control as the Trigon-6 Keyboard. It features the same pure analog signal path with discrete oscillators and filters, and the same high-quality digital effects. It also has the same intuitive layout with full-sized knobs and switches that make it quick and easy to shape new sounds.

The Trigon-6 module sounds huge — just like the keyboard, because it is the same six voice polyphonic instrument, just in a smaller form factor. And if you want even more polyphony, you can use the poly chain feature to link any two Trigon-6s for a stunning twelve-voice synth!

A Sound That is Bold and Familiar

The Trigon-6 is Sequential’s polyphonic take on the classic, thick and creamy, 3-oscillator-plus-ladder-filter analog sound that defined the dawn of the synth era. It’s a sound that bridges genres and styles — now refined and redefined with Sequential’s own modern imprint.

Friday, March 20, 2026

DSI Pro 2 SN 00862

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


via this Vemia listing

Click the auction link on top when you get there for additional listings.

"dave smith pro 2, good condition, latest firmware installed. Has a few marks from use, see photos, comes with printed out manual. VEMIA can collect and pack: 24GBP."

Thursday, March 12, 2026

Sequential Pro-One Analog Synthesizer: Famous 80s Hit Songs and Yazoo Sounds


video upload by RetroSound

"The Sequential Circuits Pro-One is one of the most legendary mono synthesizers of the 1980s—and responsible for some of the most iconic sounds of the synth-pop, new wave, and industrial era.
In this video, you'll hear famous Sequential Pro-One sounds and riffs used in real hits from the 80s.
From powerful basslines to screaming leads to sequenced arpeggios, the Pro-One stands for raw analog character and a sound that has shaped entire decades. Yazoo used the Sequential Pro-One in the album Upstais At Eric`s.

The Pro-One Sounds:
0:07 Yazoo Tuesday
0:26 Yazoo Don`t Go
0:40 Yazoo Bring Your Love Down
0:54 Yazoo Only You
1:11 Yazoo Situation
1:25 Yazoo Goodbye 70s
1:38 Yazoo Two Pieces
1:52 Berlin Metro
2:08 Berlin Masquerade
2:25 Peter Schilling Major Tom
2:48 Secret Service Flash In The Night
3:18 Beagle Music Like Ice In The Sunshine
3:30 Eurythmics Here Comes The Rain Again"

Friday, March 06, 2026

The Oxi E16 is the best MIDI controller I've owned. It makes the OP-XY so much more jammable 🎛️👌🏻


video upload by DeeCee

"I've been dabbling with MIDI controllers recently (as you will have seen if you've watched my recent stuff). Nothing has really hit the mark, until now. It's been a right pain in the ass to set up (the Mac app doesn't want to let me use it to configure settings) and have had to manually enter them on the device itself. But it's actually pretty easy once you know how. The OP-XY and Artemis have presets available to upload to import to it so you just need to know what you're doing and you're off. I've wanted a small but robust controller for ages and decided to give this a go. It's not cheap but it's impeccably made. The linking of encoders is amazing. There's no way you could perform a filter sweep on 2+ tracks on the OP-XY. This makes it easy peasy. Love it. Hope you enjoy!

Gear used:

Music:
Teenage Engineering OP-XY
Dreadbox Artemis
Oxi Instruments E16

Video:
Fujifilm X-M5
Motu M2 Audio interface
Mac Studio with Logic Pro X"

Tuesday, March 03, 2026

Dave Smith Instruments Pro-2 Paraphonic Hybrid Synthesizer SN 00877

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


via this listing

Additional Perfect Circuit listings

Thursday, February 26, 2026

Soundmit moves to Cremona @ CremonaMusica October 2–4, 2026 — Cremona, Italy



via Soundmit

"We are excited to announce an important update for the upcoming Soundmit.

For the first time, the event is moving from Turin to Cremona and will take place inside CremonaMusica, one of Europe’s leading trade fairs dedicated to musical instruments.

📍 Cremona, Italy
📅 October 2–4
🌍 20,000+ international visitors
🏢 400 exhibitors from 35 countries

CremonaMusica in Numbers: https://cremonamusica.com/faf/

This edition marks a historic moment: it is the first official opening of Cremona towards music technology and electronic innovation.

Within CremonaMusica, Soundmit will host a dedicated area focused on:
Synthesizers
Modular synths
Pro audio
Studio gear
App & Software
Music Production
DJ gear
Boutique instruments
Innovative instruments and emerging technologies

⚠️ As this is the first integration of music technology within CremonaMusica, exhibition spaces are limited. For booking and information: info@soundmit.com"

Wednesday, February 25, 2026

AnalogFX SER-2020 analog monophonic Synthesizer deeper Review. The rise of the Synton Syrinx!


video upload by Knobs & Switches

"here is my deeper review about the AnalogFX SER-2020 analog Synthesizer. A recreation of the legendary and sought after Synton Syrinx together with some FX Pedals and other helpers. (Antonus Step Brother, Erica Synths Perkons HD-01, Korg Drumlogue, Stylophone Beat, Ryk Modular M185 Sequencer, Waldorf KB37, Arturia Keystep Pro, CB Lost&Found, GlouGlou Flancher9, Dreadbox Lethargy, Strymon DIGv2, Boss-RV5, Meris Polymoon,

https://www.analogfx.com/products/ser...

For Pedal Power i used the MyVolts CrazyChain MkII: https://myvolts.com/CrazyChainMKII/?a...

The fancy Audio Cables are the MyVolts Candycords: https://myvolts.com/CandyCords/?a=kas

CV and Clock Cables are MyVolts Halos: https://myvolts.de/Halo/?a=kas

00:00:00​ Intro
00:00:029 Title Track (Only made with the SER-2020 incl. Drums)
00:01:44 Epilogue
00:05:48 Music and Sound Demos
00:14:47 SER-2020 Roun Down
00:19:11 VCO`s, Sync & Ringmod
00:28:03 Formant Filter, LPF & ENV
00:39:46 VCF In
00:42:02 LFO 1 & 2
00:47:37 Bend Pad & Portamento
00:49:22 Speechmode
00:51:42 Conclusion
00:52:22 Outro (SER-2020 + Korg Drumlogue only playing SER-2020 Samples)

Image Sources:

Synton Syrinx: https://greatsynthesizers.com thanks to Theo Bloderer

https://www.synthforbreakfast.nl/inte...

Used Equipment: Apple iPhone 14 Pro Max, Apple iPhone 12, Sony ZV-1, Rode Wireless ME, Universal Audio Apollo Twin Solo, Yamaha MG-06, Steinberg Cubase 14 and Final Cut Pro X"

See The Florian Schneider Collection here.

Sunday, February 22, 2026

Norns XL Pro 2025

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


via this eBay listing

"This is made by freepoet, the best Norns that I have ever used. Battery is powerful and nice case!

Key Features:

1. 3.5mm MIDI In/Out (TRS): Seamlessly integrate with other MIDI devices.

2. Enhanced Core for Smoother Performance: Powered by the Raspberry Pi 4B, ensuring superior speed and responsiveness.

3. 7000mAh Battery Capacity Management System: Extended battery life, so you can create without interruptions.

4. Superior Audio Output Quality: Major improvement in sound fidelity for professional-grade audio.

5. Independent Power Switch: Easily turn the system on/off without any hassle.

6. Full USB-C Ports: Modernized connectivity for a faster, more reliable connection.

7. Grid and ARC Powered Without Plugging In: Run your external devices like the Grid and ARC directly from the Norns XL Pro without the need for additional power sources.

8. 6.5mm Stereo/Mono Mixed Input: Compatible with both stereo and mono sources, providing versatile input options.

9. 6.5mm Stereo/Mono Mixed Output: Flexible output for various setups, ideal for live performances or studio work.

10. 3.5mm Stereo Headphone Jack: High-quality audio output for personal monitoring.

Laser-sintered Shell with Comfortable Texture: Feel the premium quality and ergonomic design.

Seamless, Dust-Resistant Interface: Designed to keep your gear clean and free from external interference.

11. Replaceable Battery and Expandable Memory Card: Future-proof your system with the option to upgrade both battery life and storage capacity.

Ready to Use:

Pre-loaded with 95%+ of available scripts, so it’s ready for action as soon as you receive it!"

Thursday, February 19, 2026

Waldorf Protein Synth Demo Part. 3 | Pure Patches & Ambient Textures (HQ Audio, No Talking)


video upload by DKS SYNTH LAB

"Welcome to DKS Synth Lab! In this video, we discover the sounds of the Waldorf Protein Synth. In this sounds only session, we explore the power of the Waldorf synthesis engine through ambient patches, granular textures, and crystal-clear digital timbres.."

Timeline
0:00 Intro
0:09 KingSync
1:03 Lunare
2:18 Nietrop
3:05 ID Mallet
3:47 Perc
4:30 Dune
5:30 Queen Bass
6:06 Magic Protein
7:15 Pro Vibes
8:08 Ey Piano
9:08 Komplex
10:58 Digilog

Waldorf Protein Synth Demo Part. 2 | Pure Patches & Ambient Textures (HQ Audio, No Talking)

video upload by DKS SYNTH LAB

Timeline

0:00 Intro
0:09 Distance
1:00 Humble
1:33 Soft Dist
2:05 Kaputt
2:52 Apo
3:50 Dist
5:20 Dings
5:53 Hellp
6:34 No Reason
7:28 Small M
8:21 T-Bass
9:17 String Me
10:29 Cathedr

Part 1 here

Friday, February 13, 2026

Gentle explosion - OP-XY, Artemis and Chroma Console live jam


video upload by DeeCee

"Chroma Console just hanging around making things nice and broken.

Enjoy

Gear used:

Music:
Teenage Engineering OP-XY
Dreadbox Artemis
Hologram Chroma Console

Video:
Fujifilm X-M5
Motu M2 Audio interface
Mac Studio with Logic Pro X"

Additional videos:



Playlist:

1. OP-XY isn't my favourite way to make music. It's my favourite way to break music.
2. Broken beats, psychedelic repeats and synth bleeps - OP-XY + Dreadbox Artemis Live Session
3. Little big set-up. OP-XY & Artemis - Live Melodic Deep House Session
4. Occupying the space between dust - OP-XY + Dreadbox Artemis Dusty Downbeat electronica
5. Melodic House, sprinkled with some 80s and a dash of Acid – OP-XY + Artemis Live Jam
5. A sonic journey into space with Dreadbox Artemis (and OP-XY, of course)

Yuyo cmos synth - First try Attiny85 dco with analog cmos shaping and twin t filter


video upload by JIANT

"everything is from the synth to the zoom recorder, twin t drums, xor snare, pt2399, and cmos stuff.

attiny85 reseting the phase of 40106 oscilators, the digital control accepts 1voct from keysetp and go to the 40106 inputs through resistors, a little rc for filtering the pwm, and for this reason when you change the oscillator frequency you can get intervals and crazy stuff. is not orthodox but suits my need for Rich timbres. the dco goes to 40106 buffers , and then 4040 dividers, twin t filters, one for each of the two voices, one goes to env, vca, filter, delay, and the other one to clock divider and filter, to get the sub osc.

firmware super simple only for checking the conversion from filtered frecuency of the attiny85 to my 40106 non exponencial vcos.
currently is tracking 10 octaves really good, the trick is put a voltage divider in the cv in of the attiny because keystep has 0 to 10v and the attiny accepts 0 to 5v tehn the tracking inside the attiny converts o.5v oct to 1 volt oct. i dont know anything about coding but i made it with chat gpt and my design . source code will be in the coments ."

Previous videos:

Thursday, February 12, 2026

Super J8 - A Jupiter 8 for the iPad

SUPER J8 - iPhone, iPad - Tutorial & Walkthru!

video upload by MATTHEW FECHER

"Inspired by the mighty JUPITER-8*, the BEST AUDIOKIT APP:
https://audiokitpro.com/superj8

0:00 Intro, New Features!
1:32 2x Oversampling
1:56 True Per-Voice Unison, 64 Voices!
3:40 Single Note Polyphony
4:07 Analog Saturation
4:49 Oscillator Sync
5:48 PWM
7:16 Mixer Panel
7:31 Cross Mod (X-Mod)
9:31 Per-Voice Panning
10:19 Main Panel
13:38 Bonus LFOs
14:14 Envelope Panel (ADSR)
16:00 FX Panel
16:23 Easter Egg?!
17:16 WiP Presets Demo
19:23 Exclusive Presets (500+ Included!)

LEGAL NOTICES
SUPER J8 is not affiliated with or endorsed by Roland Corporation. 'Jupiter-8' and any other referenced trademarks are the property of their respective owners and are used for identification and reference only."

Additional user videos:



Playlist:

1. Super J8 - Jupiter 8 for iPad - Tutorial - redskylullaby
2. AudioKit Super J8 (Jupiter 8 for iPad & iPhone) Walkthrough & Review - Gavinski’s Tutorials
3. SUPER J8 by AudioKit Pro | Jupiter-8 Inspired Synth Presets Demo & Walkthrough - Moby Pixel
4. Exploring AudioKit Super J8 - Field Tone Audio

Sequential Pro-3 // Tweaking Factory Presets // PT 2 // No Talking


video upload by LESINDES

"Sequential Pro-3 // Tweaking Factory Presets // PT 2 // No Talking
Unpublished footage from 2020"

Friday, February 06, 2026

Serviced ARP Omni 2 Synthesizer with Synthchaser MIDI, LED Sliders & Road Case

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


via this eBay listing

"Here's a nice, restored ARP Omni 2... with MIDI!! This synthesizer has just been fully serviced by Synthchaser, the United States' top ARP specialist - recapped, new key bushings, new LED sliders, clean, fully functional, calibrated, in tune and sounding great. And best of all, this has been fitted with the Synthchaser MIDI Adapter! This keyboard is the sound of Joy Division and is all over The Cars' "Moving In Stereo", and many other late 70's/early 80's albums. It produces the lush Solina/String Ensemble sounds plus has a polyphonic synthesizer section with a voltage controlled filter, LFO, and ADSR, and a dedicated bass synthesizer section.

Excellent condition, with some marks on the right leather side panel. Includes a road case that needs new foam and to be aired out as it smells musty. See photos for condition. This synth was serviced by Synthchaser (the top ARP specialist) in February 2026. Work done included:

Synthchaser MIDI Adapter - Supports MIDI IN and THRU (only an "IN" jack has been fitted on this synthesizer). Configurable MIDI channel and starting key on your MIDI controller.

Synthchaser Precision LED slider upgrade. All 15 of the old original sliders have been replaced with new, smooth, high precision LED illuminated sliders (purple color--think Prince!). The difference in the way these sliders feel and perform compared to the originals is a huge improvement.

Power supply rebuilt - All tantalum and electrolytic capacitors in the power supply have been replaced, and high quality, high temperature 105 deg C capacitors have been used for the power supply filter capacitors.

All tantalum capacitors replaced - The tantalum capacitors in ARP synths are ticking time bombs. All of the over 100 tantalum capacitors in this synth, including the power supply and filter submodule, have been replaced with electrolytics to help provide stable operation for years to come.

Synthchaser 4075 Filter Enhancement Kit Installed - The ARP Omni uses the same 4075 filter submodule found in the Odyssey, Quadra, Avatar, and Pro DGX. This has been recapped, and enhanced to provide superior frequency response.

Keyboard rebuild - New key bushings installed, buss bar & key contacts cleaned and adjusted, keybed leveled, keys cleaned

Oscilloscope calibration - Fully calibrated to factory spec using oscilloscope and frequency counter."

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