TTMC 144rev2.0 , Tokyo Gate , Tokyo Delay , 144 , 123 , 990

video upload by Tokyo Tape Music Center

https://tokyo-tape-music-center.com/p...

Model 144 REV2.0

The change is that the switches are separate.

Discrete Dual Square Oscillator Inspired by Buchla 144

ゲインは少し小さいです。 Vpp 3.8v-4.3v

144、156セットで使用することをお勧めします。

Panel Color : Matte Black
Not 1V,1.2v/Oct.

I use an analog sequencer.

Eurorack Format

54 mA +12V
0 mA -12V
0 mA 5V
Width: 14HP
Depth: 38mm

Pitch CV in 0v to +12v

If you want to use it with other euros, you will need a Precision Adder on the pitch.

956 and 156 are convenient when using with other euros.

If the switch is set to EXT, the frequency knob will not work.

It is not exactly symmetrical.

Attention to the power capacity of the case.

Change the tuning to your preference.

About 5Hz to 13KHz.

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PPG 1002 - Analog Synthesizer (Pro Serviced + Swan Flightcase)

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via this listing

"PPG Synthesizer 1002 for sale pro-serviced and comes with swan flightcase.

Had this for almost 6 years and serviced recently by Stefan Hubner who has a deep understanding of PPG systems.

Some things to observe, one underside key broken but doesn't affect play..these are originals. Jacks for CV, Gate and filter modulation have been added and adjusted to 1V/oct. Jacks added in Service. 'The mains wiring has been re-done according to current safety expectations (not to say standards) including a 'pig tail' cable with an IEC male plug for easier connection. CV and Gate were never standard on the 1002 so the ones having it were all more or less hacks, especially when it comes to oscillator CV. One would expect 1V/octave with 0 volts at a defined note usually. For the 1002 without my modification this means you set the potentiometer on the back that usually came with CV in to track 1V per octave but then had to add an offset of something around 2 volts to reach the lowest C. My approach disconnects the keyboard instead of adding some external voltage somewhere and simulates exactly what the keyboard delivers starting at 0 volts for the lowest C. The connection is being made by a relay actuated by the contacts in the CV jack. By simulating the keyboard, all panel functions remain active on the external CV (glide, tune, modulation) Trigger/Gate is a voltage input (V-Trig) working from 5V up. The filter input only modulates the filter setting and is not intended to make the filter track, for this purpose you should rather use the panel knob that attaches the cutoff control to the keyboard CV.'"

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Frequency Central feat. DARK STAR - Super compact full voice bursting with character and features!

video upload by Frequency Central

"Dark Star consists of 4 sections:

-Voltage Controlled Oscillator based on AS3340 with sawtooth, triangle and pulse waveforms
-Voltage Controlled Filter with lowpass and highpass options, Drive control, Sweep control which attenuates amount of Release CV
-Release generator with CV input for voltage control of release time. Option for sustain via jumper on rear panel.
-Voltage Controlled Amplifier

Together they form a pre-patched super versatile analogue synthesiser voice.

Additionally, each section is fully modular in it’s own right, so there are patch points for:

-1V/oct CV input
-PWM CV input – attenuator doubles as manual pulse width when no external signal is present
-Gate input for Release or Sustain/Release
-Release CV input for voltage control of Release time
-VCF audio input with attenuator, for introducing external audio
-VCF CV input with attenuator (1V/oct CV is normalised to this input)
-VCA audio input (VCF is normalised to this input)
-VCA CV input (Release CV is normalised to this input)
-Release CV output
-VCO audio output
-VCF audio output
-VCA audio output"

PATCH / ROUTE 4 / arps & melodies / sounddesign exploration

video upload by Joranalogue Audio Design

"The 1V normalized routing inputs on ROUTE 4 make a lot of sense when you start using ROUTE 4 to change up an existing sequence, by either precision mixing the 1V/oct pitch cv with ROUTE 4s output or by using an additional V/oct input on your vcos (luckily GENERATE 3 Exp. FM inputs are nearly perfectly calibrated to accept V/oct signals). Using ORBIT 3 as a master control for all the switching on ROUTE 4 makes for a chaotic but controlled course of pitches."

BugBrand Introduces FilterQAmp - Filter, Amp and Decay Envelope Module in Frac Format

"

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A post shared by Tom Bugs (@bugbrand_bristol)

via BugBrand

"The FilterQAmp (FQA) combines a 2-pole State Variable VC Filter with a Linear VC Amplifier and an inbuilt variable-decay Envelope Generator. It is capable both of processing and, when the filter is self-oscillating, generation of synthesised sounds such as drums.

The VCF section contains a State Variable Filter (similar to my other designs) – this offers switchable Low or High Pass responses and covers the full audio range. It is temperature compensated & tracks 1V/Oct accurately. The Resonance/Q is voltage controlled with a linear response up to self-oscillation – this creates a pure sinewave, useful for synthesis.

The VCA is linear in response and takes the Low/Hi-pass output from the VCF section. It can either be set, via rear jumper, to a clean response (gain from 0 to +1) or saturation (gain from 0 to +1 then +/-5V zener clipping beyond – unity at approx 10 o’clock rotation).

The Filter, Q and Amp sections each have a CV Modulation depth control with switchable polarity (centre off) – the Filter has an additional 1V/Oct control input. In addition there is a simple variable-decay Envelope Generator which can be fired either with the manual Trig button or via the Trig input – this has a comparator so triggers on any signal over c.+1V. Decay time is variable between approx 15mS and 3Secs with an amplitude of 0 to +10V. The envelope is internally routed to modulate the Filter and Amp sections via individual depth controls – it could be manually patched to QCV with a 0.75″ shorting bar or cable.

When Q is set to full, the self-oscillating filter makes good sound generator – it can also ring when set below self-oscillation & fed with sharp edges such as gate signals. A basic drum synth can be achieved with self-oscillation and the decay envelope opening the VCA – try varying how much the envelope modulates the filter cutoff too. You can feed the main output back to the FCV input to self-modulate, resulting in an interesting peaky waveform."

Gimme Some (Kick) Drum by Blue Lantern Modules || Full Walkthrough and Sound Demo

video upload by Robots Are Red

"GSDrum, or Gimme Some Drum, or Gimme Some Kick Drum is a 10 hp drum synthesizer module. It really shines as a kick module, but can do other drum sounds such as toms or something out of the syncussion, or act as a bass synth tracking it 1v/oct. This is not a typical kick oscillator using the 'Twin T' approach, GSDrum uses a v/oct tracking triangle core VCO with an OTA based VCA. There is CV control for the trigger of course, along with v/oct tracking, Linear FM, and VCA accent inputs. The Timbre knob shapes the oscillator starting at a sine wave, to a triangle wave, all the way to an overdriven square wave. Influenced by the Korg ER-1 drum synthesizer. The accent input can simulate midi velocity or drive your sound even more. You can jump to any section of the video here: 00:00 Opening 01:03 Introduction 01:42 Walkthrough Begins 01:50 Pop 02:07 VCA Envelope 02:58 Pitch Envelope 04:05 Tune Knob 04:15 VCA Knob 05:07 Timbre Knob (Waveform morphing) 06:16 Accent Input 06:57 v/Oct Input 07:10 Linear FM Input 07:40 Feedback Patching 08:43 Kick and Drum Sounds (Minimal Talking) 10:11 v/Oct Bass Line Demo (Minimal Talking) 11:17 Accenting with Sequenced Gates (Minimal Talking) 14:25 Frequency Modulation with Sequenced Gates (Minimal Talking) Special thanks to Blue Lantern Modules for providing the modules for this video."

via Blue Lantern Reverb

"Part of the 'Gimme Some' series. Gimme Some Drum....

What does this module do?

This module is a complete mini synthesizer that specializes in making analog kick drum sounds.

This product does not use a "Twin T" approach to make it's drum kick sound. This is using an actual 1v/octave

triangle core vco, and ota based vca. The shaper circuit that converts a triangle wave into a sine wave was brought to the front panel. The shaper knob was calibrated to start its shaping at the beginning of a sine wave, and end with an overdriven square wave.

This parameter is called 'Timbre'.

This product can produce a wide variety of ultra generic analog kick drum sounds.

Influenced by the Korg ER-1 drum synthesiszer, but laid out in an analog fashion.

-toggle switches are connected to 'timing' capacitors. You can select decay legnths on the fly.

-Depth Knobs let you precisely dial in how much punch, and loudness you want.

-Accent input lets you simulate 'Midi' velocity but with a positive CV input signal. This makes the Amplifier go louder in volume.

This is basically a CV input for the VCA circuit.

-POP parameter creates a clicky sounding, short audible pulse.

All the internal circuitry was optimized for drum kick. You really can't goof up and not make a percussive sound.

All you need is a triggering signal.

Internally Pre-Patch Products: OTA Triangle Core VCO + Sine Wave Shaper + Assist Percussion Utility

Big time savings!"

Macbeth Micromac-R X-Series Analog Eurorack Synthesizer

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via this auction

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6 ace things a Disting does.

video upload by mylarmelodies

I believe this is the 2014 video: Expert Sleepers Disting 16-in-1 Eurorack Module Demo

"Being a demo of 6 interesting things an Expert Sleepers Disting MK4 can be: A Pulsar VCO (2:57), a Stereo Tape Delay (6:58), a Granular Pitch Shifter (13:45), a Shift Register Sequencer (16:46), a 1V/Oct Sampler (21:46) and a Dual Sampler (26:26).

Signal Sounds hired me to make a new Disting video following my one from 2014: Mega thanks to them for supporting this as ever, this was fun & they are good people. Hat tip to Os at Expert Sleepers for endlessly making this thing useful!! Here's to 10 more years?"

https://www.signalsounds.com/

CHAPTERS
00:00 Intro & Montaaage
02:57 Pulsar VCO
06:58 Stereo Tape Delay
13:45 Granular Pitch Shifter
16:46 Shift Register Sequencer
21:46 1V/Oct Sampler
26:26 Two Voice Sampler

Tiptop Audio Officially Releases ART Line of Eurorack Modules

via Tiptop Audio

"Today, we are celebrating the release of the first set of ART-equipped modules, marking the first time this technology is ready for purchase. We are starting with the release of the ATX1 Analog VCO, Vortex Digital OSC, Octopus USB/MIDI interface, ART V/OCT Quantizer, and Control Path dual analog envelopes plus VCA.

On our website, we have dedicated the ART landing page as the knowledge base HQ for ART. There, you will find plenty of educational videos, module video manuals, and uploaded video playlists of music filmed during beta testing. ART is simple to use and easy to understand, and with those videos, we made sure all aspects and potential misinformation have been addressed. Additionally, more information is in the process of being added in the coming days for both DIY enthusiasts and module makers on how to implement ART, including a free reference design that adds ART to Mutable Instruments Braids and Plaits.

The creative process of making music on a modular synthesizer is a unique tactile and aural experience. With ART modules, we are entering the territory of tunable instruments and polyphonic multi-timbral compositions but with the sound design power and immediate interface of a modular synthesizer. The initial release focuses on the mono VCOs that you can use to build voices quickly or combine for discrete polyphony. Very soon, we will extend the lineup with the fully polyphonic ART modules and the release of the Polytip patch cable."

Individual modules below. Systems:

Pictured Top: The Analog Bundle S1 $945 Save 33%

Middle: The Analog Bundle S2 $999 Save 33%

Bottom: Vortex 6, Octostages Poly Envelope, Octapass Poly Filter, Octagain


ART Demo Videos

ART Beta Testing recordings


ART Essentials


ART modules video manuals


Demo patches, tips for sound design

ATX1

A classic all analog saw VCO core with 3 switchable modes, ART, 1V/Oct, LFO and is recommended as the basic building block for ART systems. It is designed for patching analog polyphonic synths from discrete modules or multi-mono patches in ART mode. When using ART the ATX1 takes care of the tuning including accounting for temperature changes. In 1V/Oct mode the ATX1 runs as a standard old school modular VCO. LFO mode drops the frequency range and is great for patching vibrato to other ATX1s among other things. The ATX1 outputs variable waveshapes with manual or CV control. Classic FM, PWM and hard sync are provided. A dedicated Gate Out in ART mode manages the voice envelopes or any modulation synced to that voice. We consider the ATX1 the best sounding analog VCO we ever created.

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SERGE GTS (for eurorack) - Waveforms

video upload by Serge Modular | Random*Source

"How does a slope generator sound? Here two Serge GTS are used as a Complex oscillator that is run into a Variable Slope filter (VCFS), playing a simple MIDI loop via 1V/Oct. Single patch, just playing with a few knobs...

The Serge GTS is a complete redesign of the famous Serge Dual Universal Slope Generator (DUSG) by Serge himself - with a new core, optimized for speed and tracking. Like some of the clones it can be used for CV, but provides exceptional audio performance: transient rise times as fast as 12µs and a maximum cycle speed of 28kHz."

NiftyCase - Firmware Update

video upload by ranzee

"Step-by-step procedure in updating the Cre8Audio NiftyCase to the new USB firmware. Cre8Audio have developed a new boot loader that uses a different USB protocol (HID instead of libUSB). This new boot loader is used on our later products (Mr Phil Ter, and NiftyKEYZ) without any reported problems, and without the need for drivers on any OS. It will also be used for future NiftyCASE, Chipz and Cellz batches.

I found this update also fixed my CV Pitch 1v/Oct issue."

► Patreon: https://www.patreon.com/ranzee
► Blog: http://ranzee.com

Minimal Jam: Chance Delay & Entropic Doom - random gates, melodic noise, analogue percussion

video upload by AJH Synth Official

"A minimal jam using 2 Chance Delay modules, triggered by a sequencer clock, with the Entropic Doom to create both percussive and melodic noise-based sounds. Also a simple dual-oscillator analogue bass line using 2 Vintage Transistor Core VCOs and the Transistor Ladder Filter. Turn on Subtitles/Captions for an explanation of what's going on.

The Chance Delay generates randomness with its 'Chance' control, which determines the probability of gates occurring. It also uses its Length control to divide the frequency of the incoming clock signal - this is done by forcing the gate lengths to exceed the interval between clock pulses, and not producing further gates until the current gate cycle has finished. It also has a gate-delay function, and all three of these features can be voltage-controlled.

The Entropic Doom is a noise generator with a built-in, voltage-controlled, low-pass filter. This VCF has 2, 3 and 4-pole modes, and is resonant, producing significant self-oscillation in 4-pole mode, whilst also tracking 1V/Oct. This means it can be used melodically, extending it's usefulness beyond just noise washes or percussion. Additionally, it includes an audio input to add other signals into the pre-filter feedback loop, and it can sync it's noise frequency to an external source. To top it off it also features a CMOS ring modulator and XOR VCA, both of which can be used with or without the rest of the module. This thing can go from subtle and pretty timbres to crushing, mangled, distorted chaos.

CHANCE DELAY Introduction video: https://youtu.be/f4weiEGeOvQ CHANCE DELAY & Sequencer: https://youtu.be/MiOPo6XKgY0 ENTROPIC DOOM used melodically: https://youtu.be/FPfBpyFm_tM ENTROPIC DOOM for percussion: https://youtu.be/l17z82qy5Vs TRIPLE CROSS Introduction video: https://youtu.be/Y1G4Cgka1l8

The AJH SYNTH Eurorack range consists of high-end modules, all hand-made in the UK, most of which are based on classic, vintage designs, authentically recreating the circuitry of much sought-after analogue instruments and technologies of the past, whilst greatly expanding them, and bringing them to modern Eurorack levels of convenience, limitless flexibility, and reliability. Official website page: https://ajhsynth.com

Check out the AJH Synth playlists for module 'User Guides', and 'Patch of The Week' videos, which will be either performances or 'how to' guides, detailing functions/methods, and a range of sounds, some familiar, some less so, containing a patch sheet at the end to show you how to construct it for yourself.

Video by @DreamsOfWires"

Frequency Central Introduces AKROPOLI Advanced Generative Sequencer

video upload by Frequency Central

"Akropoli is an extension and enhancement of our successful Little Melody and High Towers modules, offering the features of both of these modules as well as some of it’s own unique features such as mute buttons per channel, manual transpose knob and 1V/oct transpose CV input. Akropoli operates using our proprietary TOOL V2 code, and can count in integers as well as multiples for even more subtle and evolving variations.

Akropoli is a generative sequencer based around clock divisions and a chromatic quantiser, used to create in-the-moment licks and riffs. It is more that the sum of it’s parts.

Akropoli’s internal operations can be considered as 4 clock dividers patched into a CV mixer via attenuators. The attenuators select notes over a 5 octave range, the clock dividers determine how often those notes are added to the mix. The final output of Akropoli is quantized chromatically for fast set up and continuously pleasing results. Akropoli has an onboard transposition knob, as well as a 1V/oct transposition CV input.

The 4 clock dividers are labelled A, B, C, and D. They all receive clocks from the same source, the divisions may be selected using the presets and the individual division selectors. The clock dividers can be set to count up, down, or to one of a variety of modes that move between counting up and down. For further information about Presets and Modes see the Little Melody User Guide.

https://frequencycentral.co.uk/produc..."

TwinVCFilter Pinging Performance

video upload by vermonagear

"In this patch, we're using twinVCFilter as the sole sound source to demonstrate its versatility and sonic richness. FourMative CONTOURS is used as the pinging source for both filter sections. The envelope itself is triggered by randomRHYTHM.
One of the filter sections is sequenced by the 1V/OCT out of meloDICER.
All CUTOFF frequencies and the MIX function of twinVCFilter are modulated internally and by a fourMULATOR and a uniCYCLE."

AtomoSynth TK mini System, Four voice percussion synth + analog synth voice

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via this auction

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You can find demos in previous posts here.

"This mini eurorack system consist of: 1 Tottem module, 1 Koe Vactrol module, metal case with internal power regulator, external DC power adaptor

Please note, to play this instrument it is necessary a sequencer with 1v/oct CV/gate output and 4 gate outputs. for example: beat step pro, key step pro, Korg sq64 etc.

Tottem specs
Four analog percussion synthesizer voices.
Two voices feature, one oscillator, two decay envelopes, one LFO, and a noise generator.
Two voices feature, one square wave and metal oscillator, one noise generator, one mixer, and a decay envelope.
Individual manual gate buttons.
Output mixer.
Individual outputs for each voice.
Master mix output.
Manual gate button for each voice.
Current draw: 197mA +12V. 75mA -12V. 0mA +5V.
24HP wide.
25mm deep.

KOE Vactrol specs
One voltage-controlled oscillator VCO, with Triangle, Pulse, and Saw waveforms.
Folding effect control knob for the triangle waveform and pulse width, for the pulse waveform, also controllable by CV.
Square wave sub-oscillator with 1, 2, or 3 octaves below the main oscillator.
Tune and Fine Tune knobs for the main oscillator.
Glide effect knob.
12dB/oct Vactrol-based filter with low pass and high pass independent inputs. (KOE Vactrol version only).
24dB/oct Low Pass ladder filter (KOE Ladder version only).
One ADSR-type envelope generator.
Current draw: 55mA +12V. 16mA -12V. 0mA +5V.
24HP wide.
25mm deep."

Macbeth Micromac-D

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

via this auction

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"Minimoog style desktop synth from Ken Macbeth. The condition is very good. There are no technical problems. There are a few small scratches on the case. 220 volt power supply included.

3VCOs: VCO1 and 2 have saw, pulse, triangle and sine waveforms and the pulse width can be voltage controlled by external CVs. A low frequency noise with level control is available as well. VCO 1 can hard sync VCO2. VCO3 can be used as a modulation oscillator and can be disconnected from the master CV. Modulation targets are filter cutoff frequency and/or pitch of VCOs1and2. All VCOs have individual outputs, coarse and fine frequency controls, separate CV inputs for controlling frequency and pre-filter level controls.

The filter is a Moog 24dB lowpass filter. It´s input is a mixture of all three VCOs and noise. The cutoff frequency can be controlled by the first envelope generator as well as by an external CV. The filtertracking is switchable between off / half / full (0%, 1V/oct and 1.5V/oct).

The envelopes are ADSRs with a switchable release parameter thats time is depending on the decay parameter, just like the Minimoog. The filter envelope can be also used to control VCO2´s pitch what sounds great when VCO2 is synchronised. Furthermore you can invert this envelope´s characteristic. The second envelope modulates the VCA. If an external CV is patched to the VCA the internal modulation is broken up. A momentary button allows for manual triggering of the envelopes"

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Serge GTS (eurorack) goes FM

video upload by Serge Modular | Random*Source

"ow does a slope generator sound? Here two Serge GTS are used as VCO(s), mixer, envelope generator, filter and finally for FM (with an added VCFS), controlled via 1V/Oct and Midi / keyboard.

The Serge GTS is a complete redesign of the famous Serge Dual Universal Slope Generator (DUSG) by Serge himself - with a new core, optimized for speed and tracking. Like some of the clones it can be used for CV, but provides exceptional audio performance: transient rise times as fast as 12µs and a maximum cycle speed of 28kHz."

Serge GTS eurorack - 1V/Octave demo

video upload by Serge Modular | Random*Source

"The Serge GTS is a complete redesign of the famous Serge Dual Universal Slope Generator (DUSG) by Serge himself - with a new core, optimized for speed and tracking. Like some of the clones it can be used for CV, but provides exceptional audio performance: transient rise times as fast as 12µs and a maximum cycle speed of 28kHz.

In this demo 2 GTS are used parallel as Sawtooth oscillators (= 4 oscillators), controlled via 1V/Oct and Midi / keyboard. In such Sawtooth mode, the GTS tracks over about 6 octaves, up to more than 2kHz."

EML ElectroComp 101

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via SYNTH CITY Reverb

Note auction links are affiliate links. See the site's privacy policy for more info.

"Introduced by Connecticut based Electronic Music Laboratories in 1972, the ElectroComp 101 is a portable and patchable duophonic synthesizer which rivals other 1970s synths from Moog and Arp.

Notable for it's relative tuning stability and distinctive audio signature, the EML 101 is a synth that has a character all of its own, with a distinctive sample and hold circuit and ring/amplitude modulation. The rich sound of this synth is rounded out by a 12/db octave multimode filter.

This instrument, SN 262, arrived in solid physical condition, serviced and calibrated. Installed 1v/oct cv input mod and calibrated modification. Ready for studio time!"

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EXTREMELY RARE PPG 1002 for Tom + first ever shop tour!!!

video upload by foleytronics fx repair

"Here is a demo of the EXTREMELY RARE PPG 1002 for Tom. Plus a bonus first ever tour of the Foleytronics shop!!

For those that want to attempt to tune this synth, here is what worked for me:

The trimmer by the regulators is the CV offset; trim for 0v for the lowest key. This interacts with the CV v/oct, which is right above where the two shielded cables connect from the 20-pin keyboard connector. Trim this for 1v/oct, which can be measured at the switched oscillator CV input jack on the back of the instrument. Once these are set, you can move on.

The oscillators are tricky. They each have an initial frequency trim pot and a volt/octave trim pot. However, the initial frequency trimmer cannot be set willy nilly to A440 because their initial tuning frequency greatly affects the octave selection switches on the top panel. What I found to be most effective is to set the MASTER TUNE front panel pot to 0, the OCTAVE SLIDER to the left of the keyboard to the middle and then begin tuning. Note, every trim pot for each oscillator will affect the others for that oscillator so this is an exercise in extreme patience.

First, turn off keyboard control for OSC B and roughly center its front panel tuning pot; set its octave to +3 and put a folded piece of paper on middle C. You are now going to tune the octave selector for OSC A; this part is confusing as there is a trimmer to adjust the octave selection offset for BOTH oscillators, but only OSC B has an adjustment to “match” its octave selection with that of A. Thus, you have to use that trimmer to get OSC A perfect and then match B to A - the method that worked for me was to switch between octaves for OSC A and adjust the octave offset trimmer along with the initial frequency trim pot for A to get a perfect octave selection for OSC A over the OSC B drone.

After the OSC A octave adjustment, it’s time to adjust B’s octave adjustment. Set A to +3, and switch OSC B to +1; adjust for zero beating at the trimmer in the upper left corner of the board right at the edge of the PCB. Then, switch OSC B back to +3 and adjust its initial frequency for zero beating; repeat this until the octave selection is perfect for B.

Now, it’s time to adjust for V/octave for each oscillator. Sadly, this adjustment affects the octave center calibration we just did, so you’ll have to keep backtracking until it’s good. Adjust the V/octave trim pot for OSC A, which is directly to the left of the CV v/octave we did in the first step. You’ll now have to mess with the init. frequency for A along with the V/oct to get the oscillator to track correctly on the keyboard, but like I said earlier, you have now probably slightly messed up the octave selection so you will have to go back and do that again. Then, adjust the tuning of OSC A again and repeat this process until OSC A tracks perfectly and has good octave selection. I couldn’t really get the +4 octave to be perfect, but hey, it’s a prototype and is probably 50+ years old.

Now for OSC B; it’s very similar to A. Use the V/octave adjustment trimmer which is the lower left trim pot on the PCB along with the initial frequency trim pot to get B to track along the keyboard. Again, you’ll have to go back and adjust the octave selection, but that’s not as bad for B because its octave adjustment doesn’t mess up OSC A’s octave selection. At this point, you should be able to get OSC A and OSC B to track the keyboard and the octave selections should be there"