Buchla Easel Techno

Published on Sep 23, 2018 Honeysmack

"Faffing about with Buchla Easel. The Intellijel Metropolis sending CV/Gate to Synovatron CVGT1 then onto the Easel."

Buchla .Look mom, no bongos!

Published on Nov 19, 2017 therudyrude

"Buchla Performance with Q-bit Nebulae and Big Sky plus H9
MakeNoise Pressure Points going to the CVGT1 Synovatron"

Synovatron CVGT1 tutorial.

Published on Oct 22, 2017 musicalfungus

"Detailed tutorial on the basic operations of the Synovatron CVGT1. Specifically how to sequence the Buchla Music Easel from the Make Noise Rene sequencer."

Moog Voyager to Eurorack Interface From Synovatron

via @davegalemusic

"Interface your @moogmusicinc Voyager to Eurorack! Expander module from @Synovatron @MusicTechMag @BrightonModular"

via Synovatron

"ATTENTION: The first and most important thing that I need to get across here is that the VXP1 has been designed for the keyboard versions of the Moog Voyager. The Old School version has the same Accessory Port but does not have a touchpad so therefore does not support the Touch X, Y, A and Gate outputs. The RME (Rack Mount Edition) has an Output Accessory Port and does support the VX-351 and is probably OK BUT I have not been able to verify the extent to which it is compatible as there is virtually no information about the RME Output Accesory Port's signal set. Logic suggests it is very similar but I cannot yet guarantee how well the VXP1 will work with the RME. I will try and find out (maybe borrow an RME for a weekend - any offers?).

TOUCH Outputs (X, Y, AREA, GATE)
This function produces TOUCH X, Y, AREA CV and GATE outputs in response to touching the Voyager's touchpad. X and Y vary according to where the pad is touched, AREA varies according to how much area on the pad is being pressed. The GATE turns on when the pad is touched.

X, Y and AREA are CV outputs that have an effective range of ±5V.

GATE is a 0V off and 10V on signal. The GATE LED illuminates when the pad is touched.

NOTE: The Touch outputs are not supported by the Old School Voyager; they will remain at zero volts. One possibility I'm looking into is to provide a modification to allow the 4 Touch connectors to be used as a mult. This would involve removing 4 resistors and adding 3 linking wires on the circuit board. Another possibility is to make X, Y and AREA into diode connected inputs to the GATE output. This would act as a logic OR gate. This would entail fitting diodes to 3 connectors and wiring them to a spare comparator chip and wiring that to the GATE output driver. These options would have to be ordered as an Old School variant with Mult or Diode options but I will publish details of how to modify or revert back to standard.

KEYBOARD Outputs (PITCH, VEL, PRESS, GATE)
This function produces KEYBOARD PITCH CV, VEL CV (velocity), PRESS CV (pressure) and GATE outputs in response to playing the keyboard. PITCH CV is determined by which key is pressed, VEL by how fast a key is pressed and PRESS by how hard a key is pressed. The GATE turns on when a key is pressed.

PITCH is a CV output that is trimmable to 1V/octave (using the screwdriver adjustment on the front panel) and has a nominal range of -0.916V (low F) to +2.667V (high C).

VEL and PRESS are CV outputs that have an effective range of ±5V.

GATE is a 0V off and 10V on signal. The GATE LED illuminates when a key is pressed.

WHEELS Outputs (PITCH, MOD)
This function produces WHEEL PITCH and MOD CV outputs in response to operating the Pitch and Mod wheels. The Pitch wheel is centre sprung to give 0V when not operated. The Mod wheel is not sprung and can be left in any position. Normally when the Mod wheel is fully rotated towards the player no modulation occurs (in the Voyager). However this position equates to -5V output. A jumper can be set on the VXP1 circuit board to provide either the standard ±5V range or a 0V-10V range. A 0V-10V range will allow it to operate a modular VCA to control modulation depth for example.

PITCH and MOD are CV outputs that have an effective range of ±5V but MOD is jumper selectable to have an effective range of 0V to +10V.

MORE TO FOLLOW IN DUE COURSE........"

"Here is the panel design that will go into production"

Synovatron cvgt MM Buchla Translator ModuleModules Shipping

via Tone's aka Synovatron - note the different modular formats listed below.

"The first cvgt MM modules have started shipping to clients at the top of the pre-order list. If you want to be added to the list then please make contact on synovatron@btinternet.com

I will build in small batches and work through the list in chronological order and will then contact you when your order is ready to ship. Only at that point will I request payment (see prices below). Please note that this does not form any contract between us and you are not in any way commiting yourself to making a purchase until such a time that you make a payment.

Initially the cvgt MM will be only available directly from me but if there is enough demand then it is possible they will become available at all the usual distributors in due course.

The current variants are:-
Buchla-Euro (round or hex nuts on 3.5mm jacks; please select)
Buchla-Serge*
Buchla-BugBrand*
Buchla-Fenix*
*These are banana socketed variants and only the colour of the banana sockets is different (to match the target system); All are variants (inc. Euro) are to translate from Buchla to 1V/octave systems.

The User Manual is being worked on and will be ready very soon and will posted here in an update. Please checkout the Eardrill website for more info on the ModuleModule concept and other great products from Chris Muir..."

SYNOVATRON CVGT1 EURO BUCHLA TRANSLATOR

via this auction

Video at the listing and previously posted here.

"The Synovatron CVGT1 (control voltage gate trigger module 1) is a eurorack to buchla™ translator module; it is designed to allow control signal integration between eurorack synths and buchla™ synths; or any 4mm banana socketed synth for that matter (e.g. serge™ , bugbrand™ ). it is not just a format jumbler; it has signal conversion circuitry for both control voltage (cv) and timing signals (gate, trigger, clock, pulse).

it is bidirectional; allowing both synths to send and receive signals to and from each other.

the cv translation channels use precisely scaled conversion electronics allowing eurorack modules (1v/octave) to control and to be controlled by synths with 1v/octave, 1.2v/octave and 2v/octave scaling. eurorack has a bipolar cv range (up to ±10v) whereas buchla™ has a unipolar 0-10v cv range; hence there is an offset switch to allow the scaled cv to be shifted into range if required but note that not all euro generated cv signals are bipolar and those don't need offsetting e.g. adsr and quantiser outputs. there is a tell-tale led that lets you know if the output goes out of the buchla's range.

the timing translation part allows euro gates, triggers and clocks to be converted to 10v buchla™ pulses including the unique to buchla™ tri-state 0-10v leading edge trigger with 5v sustain. conversely buchla™ timing signals can be converted back to euro compatible gates, clocks and triggers. the timing inputs (pulse in, trig in and gate in) have comparator front-ends allowing any shape and size of signal to be used provided it goes through the switching threshold.

the front panel has buchla™ sympathetic front panel graphics and connector color coding.

Specifications:

· current consumption: 20ma max – 5v is not required

· 8 hp (40.3mm); pcb depth 33mm, 46mm at ribbon connector

· power consumption: +12v @ 20ma max, -12v @ 10ma max, +5v is not used

· a-100 bus utilisation: ±12v and 0v only; +5v, cv and gate are not used

· full specification in the comprehensive user manual."

Synovatron Module Ideas

via Tone's

Top: "A sister module for the CVGT1

This is another idea I've been progressing which will complement the CVGT1 and is intended for non pitch critical CVs and audio level translation."

Bottom: "ModuleModule CV and gate/trigger translator

This is just a quick post to show what I have been doing with regard to the ModuleModule design I mentioned in my last blog post. More info will unfold over the next weeks but this is just to let several Muffwigglers know that I am progressing their ideas."

van delay industries Where Buchla meets Euro

Published on Jan 1, 2013 cray56·140 videos

"Buchla meets the euro system via Synovatron CVGT1"

Synovatron's Second Module - The CVGT1

via Tone's aka Synovatron

"The new module is a Eurorack format Eurorack/Buchla translator called CVGT1. It allows Eurorack and Buchla synths to interact with each other, as the name suggest it provides a CV and a Gate/Trigger interface. Not only does it provide the correct format connectors (and adheres to the Buchla color code) but it also deals with the CV scaling and offsetting and the gate/trigger and timing pulse conversion required to allow control in both directions.

The module is in final stages of build and will need to undergo design proving tests before I release it into the world. So far the front panels are complete and all the components are in stock except for the slightly important PCBs which are due in tomorrow (18th July 2012). The intended launch date is Saturday 21st July at the Brighton Modular Meet at the University of Sussex just outside Brighton UK.

Here are some quick photos of the panels and partial assembly. I will follow up in a few days with better photos of the fully assembled module, further details and User Manual download link."

Nice pic of the sheets of CVGT1s.

CLICK FOR MORE »

Synovatron Euro to Buchla CV Interface Module

via Tone's Analog Synthesis where you'll find full details including more pics.

"I was commissioned by a client to design and build an interface module that allowed his Euro synth to modulate his Buchla synth and vice-versa."

ARP 2600 vs Synovatron CV tools eurorack module

YouTube Uploaded by DJjondent on Apr 8, 2012

"This is a comparison between the CV tools Eurorack module by Synovatron
and the Voltage processor of the old ARP 2600 synth.

The ARP 2600 voltage processors are often forgotten & neglected.
while Not as sexy as its VCOs or filters they are still very important.
I really like the The CV tools Eurorack module as it emulates all of these functions
and is so easy to operate.

The ARPs 2600 voltage processors are located between the noise generator and the S/H module.
There are 7 inputs in total.
This module contains three separate types of processor:

1. lag processors.
2. mixing processors
3.inverting processors.
-----------------------------------------------------

Lets start by comparing the 1st (top) voltage processor on the ARP 2600
with the CV tools module.

CLICK FOR MORE »

Synovatron CV Tools Gets Screen Printed Clear-Anodised Panel

via Tone's

"Following on from my last post about customer feedback I have now changed the front panel subtly from an graphic overlay to a standard screen-printed clear-anodised panel. I think my customs were right; it looks better, more professional and in keeping with all the other lovely modules out there..."

cleaninglady bass pumpin' CV Tools Module demo

YouTube Uploaded by cleaningladyfilms on May 23, 2011

"Using my limited equipment , i demo the new CV Tools module by Synovatron. (sorry no Lady Finger action here...)"

Synovatron CV Tools Modules In Production

via Tone's
"CV Tools Specification
4-channel Polarizing Cascade Mixer
Channel 1
Input: 3.5mm jack IN1
Input impedance: 100kΩ (±1%)
Normalled input: VREF - jumper selectable to +5V, 0.5V-2.5V or none
Bandwidth: DC-16kHz (-3db)
Gain: LEVEL control variable 0 to ±2 (±3%)
Output: 3.5mm jack OUT1 - Normalled to Channel 2 output mixer
Output impedance: 1kΩ (±1%)
Output indication: ±LEDs
Channel 2
Input: 3.5mm jack IN2
Input impedance: 100kΩ (±1%)
Normalled input: VREF - jumper selectable to +5V, 0.5V-2.5V or none
Bandwidth: DC-16kHz (-3db)
Gain: LEVEL control variable 0 to ±2 (±3%)
Output: 3.5mm jack OUT2 - Normalled to Channel 3 output mixer
Output impedance: 1kΩ (±1%)
Output indication: ±LEDs
Channel 3
Input: 3.5mm jack IN3
Input impedance: 100kΩ (±1%)
Normalled input: VREF - jumper selectable to +5V, 0.5V-2.5V or none
Bandwidth: DC-16kHz (-3db)
Gain: LEVEL control variable 0 to ±2 (±3%)
Output: 3.5mm jack OUT3 - Normalled to Channel 4 output mixer
Output impedance: 1kΩ (±1%)
Output indication: ±LEDs

Channel 4
Input: 3.5mm jack IN4
Input impedance: 100kΩ (±1%)
Normalled input: VREF - jumper selectable to +5V, A-100 Bus CV or none
Bandwidth: DC-16kHz (-3db)
Gain: LEVEL control - jumper selectable to 2 (±3%) or 1 (set by RV7)
Output: 3.5mm jack OUT4 and Slew Limiter input
Output impedance: 1kΩ (±1%)
Output indication: ±LEDs
Slew Limiter
Input: 3.5mm jack IN
Input impedance: 1MΩ (±1%)
Normalled input: Channel 4 output OUT4
Slew range: TBD
Gain: 1
Output: 3.5mm jack OUT
Output impedance: 100Ω (±1%)
General
Dimensions
3U x 12HP (128.5mm x 60.6mm).
Power consumption
+12V @ 60mA max, -12V @ 50mA max, +5V is not used.
Reference voltage (VREF)
Jumper selectable at each mixer input. Channels 1-3: 5.00V (set by RV6), 0.5V-2.5V (set by RV8), Channel 4: 5.00V (set by RV6), CV from A-100 bus.
A-100 Bus utilisation
±12V, 0V, CV used; +5V and Gate are not used.
Contents
CV Tools Module, 200mm long 16-way ribbon cable, 4 sets of M3 cap head socket screws, nylon washers and a 2.5mm hex key."

Generic Front Panels for DIY Kits

via Synovatron

"I now have stock of a range of 4HP and 8HP front panels to suit the Synovatron DIY Prototyping Kits. These can be purchased with the kits as an option or separately..."

Synovatron DIY Eurorack prototyping kit

YouTube via phono1337 | December 28, 2010 |

"more info at http://www.dinsync.info"

Synovatron DIY Kits Now Shipping

see Synovatron

follow-up to this post

Tone's Analog Synthesizer Projects and Products

Eurorack synth prototyping products now available on synovatron.blogspot.com

synovatron on eBay

Projects include:
* DIY Prototyping Kits 1, 2 and 3
* Standard ribbon cable
* Extender ribbon cable

Also see the front panel artwork on site.

"In the next few weeks I will be producing a range of Eurorack standard modular synth prototyping kits for synth constructors and enthusiasts; these kits will comprise Doepfer compatible printed circuit boards (PCBs) and components.

These will enable you to make neat prototype or one-off projects that accomodate bracketed pots, PCB mounted jacks, switches and LEDS so that they can be easily mounted to a module front panel.

The idea is that you build your designs on the breadboards supplied and get the front panel manufactured separately, either by yourself, or by a company such as Schaeffer"

Update: eBay links updated to synovatron. If you subbed to synthomaniac, update it to synovatron as the old store will close.