Synthesizing waveforms with a frequency divider - a sequel

video upload by organfairy

"I show how it sounds at 4:17 and play it with a keyboard at 5:50

Winter is getting closer so this is the time of year when I start building things. The first of my projects is a revisit to an old idea of synthesizing waveforms with a frequency divider. This time the waveform in question is a sine wave and some other waveforms derived from it.
The old idea is here: • Synthesizing waveforms with a frequency di... [below]
The project is quite a bit more complicated than the previous 'digital' waveform synthesizer as the sine wave is very..... well....wavy, as there are no straight lines like there is in the triangle and sawtooth waves. Therefore I had to take a different approach using a couple of 74LS138 3-8 decoders and an awfull lot of resistors.

The music is my attempt at playing something relaxing on my Wersi Prisma DX-5 organ."

Synthesizing waveforms with a frequency divider

video upload 8 years ago by organfairy

"The demo starts at 4:15.

The normal approach to generating waveforms is to start with a sawtooth wave and then fold it into a triangle wave and schmitt trigger it into a square wave. But it is also possible to synthesize the waveforms by means of a frequency divider and some logic gates. Off course the generated waveforms will be somewhat 'edgy' but that can probably be filtered out and some people might even find it usefull.

The music is something I made back in 2005 on the homemade synthesizers I had then. It's not the best piece I have made but I am still willing to take responsability for it :-)"

08.20.2021 KESAKO Reverb - Feedback and blend modulation

video upload by batchas

7. Dezember 2021 Scrotum Lab

video upload by batchas

Isla Instruments Rhythm Imposer A/S

via this Vemia listing

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

"This is a heavily modified and circuit bent Alesis HR 16. The basic idea is that you can change the eproms and then mangle the sounds into oblivion by way of the knobs and switches which create all sorts of unpredictable and fairly brutal noises. The result can be anything from utter industrial magic to unusable garbage. Comes with a number of eproms incl. Korg, Linn DMX, Roland The machine is very unstable. Sometimes it works sometimes it just doesn’t. I have no idea how to make it more stable and when it comes on and produces sound, it’s absolutely random and unpredictable. The best way to think about this is as a sample source in that you have a tape running all the time and then pick and choose the best noises that come out of it. The great thing is that you would never ever come up with these sounds if you were to program them in a targeted and controlled manner. But on the other hand, it’s of course frustrating when it doesn’t come on at all. The starting bid is set accordingly. The buyer may wish to have a technician take a look at it."

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Original Oberheim SEM cased with clone 1601

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.

"Oberheim 70's original SEM module + ARP 1601 sequencer modern clone module with PSU , panel and connectors making a mini modular in a custom case, ready to operate. 18 CV's in/out on SEM module. Everything works as expected, excellent sound and excellent cosmetic conditions. This synth comes from about à 10 years ago previous Vemia / UK."

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Cherry Audio MemoryMode Synth

video upload by Craig Barnes

"This is the Cherry Audio MemoryMode VST realized as a standalone synth. There's a mini pc inside running the standalone VST and outputting to a DAC, the controller can store upto 999 patches."

WaterWork Preview 1

video upload by ParadisoModular

"This video shows a patch that I made over the last month that is all derived from independent water sounds. from I fade the straight audio in occasionally as a stereo pair, but also run it through many effects (e.g., a flanger, granular effects that give it more of a water slap sound, etc.) and fade those in and out too, plus also use the water sounds as triggers (coming from envelope followers) and clocks for lots of audio events, use the water amplitudes to affect various processes, vocode the water against chords, and also run the water sound through one of my frequency/voltage converters that is in turn quantized to a scale that works with the chords, and form different kinds of sequences through that. The water sounds drive essentially everything in this patch. Occasionally I drive my vocoded water sounds through a 'Mellotron' tracker pedal, crossfading the source between the raw and reverbed versions. And so on... - there is lots more going on in this patch. I've evolved it through several versions, tweaking different sounds and processes, and I have hours of this recorded at various stages in case I do something more formal with it. But here's a good 5 minutes of it recorded last week, to give interested folks a flavor of what it does. All autonomous - no real-time input from me - a generative patch essentially driven entirely by the water."

TANDY TRIP and friends late nite jam

video upload by NOYSTOISE

"Why not?"

Crazy Patroche TR9090

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.

"Very interesting TR-909 clone, apparently made from a French kit. Actually, this actual machine looks absolutely identical to the one featured on Crazy Patroche's website - so the one he made, rather than one made by others from the kit? Unfortunately it needs some work. Here's our tech James' report:.

Random hum cuts in and out. Snare sound faulty, no body and snappiness. One of the tuning pots perhaps wired backwards, clockwise tunes down. Still a great and presumably fairly simple project. Packing to include UK or Euro lead: 9GBP."

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Debugging Serge Resonant Equalizer (analog modular synthesizer circuit)

video upload by Lantertronics

0:00 Introduction
2:05 Signals at wipers
3:08 Op amp outputs
4:21 Wild goose chase
5:31 Bad pots
7:26 29 Hz filter debugging
8:44 Lifted pads

Synth_Dexed on Teensy3.5 with ILI9341 TFT

video upload by Jan Ostman

MOLPO SYNTHESIZER review

video upload by the VAPE

LFO, Sequencer, Keyboard, Controller in a very small form factor: "Phantasmal Force"

video upload by Floyd Steinberg

"Distropolis Goods ( https://distropolisgoods.com/ ) sent me the Phantasmal Force MIDI controller and the Great Conjunction FM synthesizer/sequencer for review. In this video, I walk through the build process, explore the UI, and demo each mode in detail. Spoiler alert: the PF controller is worth a closer look.

Whether you're into modular MIDI setups, CC sequencing, or FM synthesis with a twist, this hands-on overview covers both devices in depth—without the hype.

Timestamps:
00:00 Intro – what's this?
00:19 Unboxing
01:01 Build instructions
05:48 UI overview
07:11 CC momentary mode
08:01 CC toggle mode
08:27 Note mode
09:00 Chord mode
09:44 Play/Stop mode
10:05 Program change ±# mode
10:24 Transpose mode
10:49 Pitch bend mode
11:37 LFO mode
12:12 Arpeggiator mode
13:03 CC sequencer
13:52 Real-world demo: playing chords over three arpeggiators while sweeping filters with CC LFOs
15:42 Phantasmal Force – conclusion
16:00 What is the Great Conjunction FM synth/sequencer?
16:30 The central idea
17:18 Building a sequence from scratch
20:57 Adding external effects and lush pads
22:15 Overall conclusion
22:47 Outro + bonus demo

HÄLP ZIS CHANNEL
https://www.patreon.com/floyd_steinberg
https://floydsteinberg.gumroad.com/
https://floydsteinberg.bandcamp.com/"

NDLR HW Upgrade

video upload by Conductive Labs

"Hi All,
Follow me along to upgrade your NDLR! It took me 15 mins to to the upgrade. Maybe watch at 1.5x??? Just two things: remove the display tag, & don't scratch your faceplate!
Steve"

https://conductivelabs.com/

Formant: pro custom-built by JVR

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 is a custom built synth made for me by Jos Van Ras who is an ex-Phillips engineer in the Netherlands who builds Elektor modules and cases.

The synth consists of the following modules: 3 x VCO - very powerful VCOs with a Moog vibe and unlike most Elektors, these have Sync inputs and the sync sound is really powerful. 3 x VCF - 3 different VCFs, two based on the original Elektor designs (a 12dB multiode filter, and another filter switchable between 24/18/12/6 dB/octave with LP and HP outputs) and a third based on the Steiner Parker filter which is really nice sounding. 1 x triple LFO - 3 simple LFOs without voltage control but with a variety of waveshapes. 1 x NOISE / RANDOM VOLTAGE 4 x ADSR 2 x VCA 2 x MIXER 1 x quadruple MULTIPLES 1 x RING MOD 1 x S&H / Inverter 1 x COM which is an output module with a 3 band EQ which is surprisingly useful 1 x MIDI to CV converter

This synth offers tremendous bang for the buck, I think it gives quite a Moog feeling in sound. It contains everything you need for a great variety of sounds but you can always patch it with Eurorack or other modular gear. I will post some sound examples as there aren't many good demos online.

The negatives are that the cabinet is just functional MDF, no fancy timber, and the MIDI interface is very basic. I usually use a Kenton for more complex MIDI control."

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The Modulo Prototype

video upload by leon dewan

"This is a rough prototype of the D1 Synthesis Modulo, a new analog synthesizer optimized for sonic exploration."

Leon Dewan is the man behind Dewanatron.

Exploring the E&MM Spectrum DIY Synthesiser, 1981

video upload by Reuben Jones

"Another video on the E&MM Spectrum Synthesiser. Not very musical, but the Spectrum is a quite unpredictable and unruly, and mine needs a proper service/calibration.

The Spectrum is architecturally similar to the Sequential Circuits Pro~One, but even the Pro~One's famed modulation matrix isn't enough to match the weirdness of the Spectrum.

The full build manual can be read here: https://www.muzines.co.uk/articles/th..."

Cherry Audio Arp Quadra synth/controller

video upload by Craig Barnes

"This is a project I built a few years back, always wanted a Quadra since playing one at Chase Music on Oldham Street, so when this VST came about I thought it was possible to build a synth with a tiny pc and a midi keyboard and some electronics to tie it all together. This week I've been spending time breaking down the Cherry Audio factory patches in an effort to load them onto the SD card and have them all at hand. I also decided to give it a spruce up because the panels were going brown in the sunlight."

A quick Caladan update: current state of UI

video upload by Isla Instruments

"As a follow up to the update I gave on our forum a couple of weeks back
https://forum.islainstruments.com/t/a...

I will not be around for the next 4-5 weeks and so just wanted to leave a progress update here, since I am doing the UI firmware for the Caladan myself now.

The populating of synth parameter data is now complete for the front panel, with automatic, dynamic parameter mapping. Menus and general machine navigation is now in place.
I've been working on a dynamic, automatic GUI that allows synth panels for cards, plugins and even external midi instruments to be created and edited, shared etc.
In the future this panel feature can import graphics, different knob styles etc to create nice GUIs for anything on the synth.

more to follow as soon as I can. thanks for your patience.
Big love
Brad!"

Patching @ 3am - Feedback patching and techniques

video upload by justin3am

"In this episode I'll be talking about the many forms and functions of feedback in electronic music and beyond.

On the first table I was using:

Fairfield Circuitry Hors d’euvres
WMD Protostar
DIY Fuzz Factory clone
EHX TubEQ
DIY Distortion+ clone
Rucci Passive Matrix Mixer
EHX Deluxe Memory Man 1100-TT
EHX Ring Thing
Boss PS-5 Pitch Shifter
Moog MF-103 Phaser
MFB Tanzmauz
4MS Pod64 with Omiindustriies Cascading Shift Register, Ya Jerk; Mutable Rings, 4MS Listen Four

On the second table I was using:

Ciat-Lonbarde Cocoquantus 2
Empress Zoia Pedal
Koma Field Ki
Lorre-Mill Keyed Mosstone
Nektar Panorama P1

Our boy cat Orion makes a special guest appearance."

A day of soldering at our recent DIY Drone Synthesizer workshop #soldering #pcb #synthdesign #vaemi

video upload by Vaemi

www.vaemi.net/atolyeler