"Had a late BEMI issue Easel come in for a modification. These are known to have modulation oscillator bleed into the reverb driver. Pretty quick and simple modification takes care of that issue. These are such fun instruments to play."
"Working on one of the sections of a new desktop instrument prototype! So far I’m liking what I’m hearing!"
Low-Gain Electronics prototyping fun. LP/BP
"Continuing to play around with a function block for a new desktop instrument I’m working on. Really liking what I’m hearing. Lots of gain staging to sort out yet…"
"The Hollasynth four-channel scanning VCA is a version of Jurgen Haible’s Interpolating Scanner idea, in 4U Serge-compatible format, complete with a beautiful front panel by Loudest Warning
It is a four-channel voltage controlled crossfader. As the scan CV is swept from 0V to 5V, the mix output fades from channel 1, through a mix of channel 1 and 2, to channel 2, then fades to channel 3 and finally channel 4. In addition to the main mix output, there is an individual output for each channel. Front panel knobs provide an offset and attenuversion on the scan CV.
The gain of each channel is also individually controllable, so the module can be used as a four channel VCA as well. A switch allows the scanning control to be disabled so that only the VCA CV affects channel gain. Finally there are attenuator for the gain CV and initial gain knobs on the front panel.
What can I do with it? Probably more than I can! But try some of these:
Crossfade between the wave shapes of a VCO for voltage-controlled morphing, e.g. from sine to saw to triangle to square and back. Like this. Crossfade between up to four audio sources under voltage control. Like this. Voltage controlled CV mixing. The inputs and outputs are DC coupled so you can use the module to mix and morph between CV sources Voltage controlled signal switching. By appying stepped CV to the scan input, e.g. from a sequencer, you can switch between signals rather than fading… if you get the CV set up just right! Like this Audio Waveshaping. Patch fixed voltages or LFOs or whatever you like into the signal inputs. Send an audio rate 0-5V sawtooth into the scan CV. Use the mix output as am audio signal. Like this. Or like this. (Thanks, Loudest Warning!) How does it work? The scanner contains four linear VCAs, one per channel, based on the LM13700 IC. Each VCA is controlled by the sum of two CVs: the direct VCA CV and the scanning CV. The scan CV is provided by a version Don Tillman’s beautiful scanner implementation, used with his kind permission. (But please don’t bug him if you have issues with the module!)"
"Playing around with the new VCA/Comp. 95% bug free. Will require a quick pcb revision but overall happy with this performance. This patch is showing the triangle out of the LGE130 tri core vco into the -IN on the comparator with output of onside of the LGE114 Dual Slopes Compact. Acting as a triangle to square wave converter with PWM. Output of Comparator into VCA above being controlled by second half of Dual Slopes Compact. Nothing fancy. Just some fun / fat PWM rhythms!"
"Playing with two Tri-Core VCO’s to experiment with sync as well as some good old fashioned PWM modulation. Looking forward sequencing this type of patch."
"Using the S/T&H module as a bit crusher to modulate a VCO’s frequency. Resulting in atari arcade machine sounds.
Dual Negative Slopes both in cycle mode. One providing a variable voltage source of which to be sampled. The second is simply clocking the S/T&H. Output of the S/T&H is being fed to the VCO Freq Modulation input. Audio is just direct from VCO’s output.
"One possible connection between the Buchla-Tiptop Audio 281t Quad Function Generator and the BuchaUSA 208c Easel Command using the UTL-1 Format Jumbler from Low-Gain. Clearly there are at least 10,000 more possibilities :-)"
Buchla 208c to Buchla Tiptop 281t 258t
"In my previous post used the Tiptop 281t to drive the 208c, this time I'm reversing the with the Buchla 208c pulser driving the 281t and different flavors of random voltages going to the 258t oscillators. Enjoy!"
"Sometimes I'm just compelled to Sequence! The Easel is clocking the custom Serge 4x8 Sequencer built by http://lowgain-audio.com. The custom Soundplex Serge panel was built by http://seeholzerengineering.com and Easel clone by djangosfire.
Enjoy!"
"You're seen my previous posts of this little Blackbox [posted here]. Today I imagined connecting it to my Buchla 200 via the 230 Envelope Follower -- here's the result. Also, keep an eye out at http://pigtagram.com/tonewreckerdevices for a 21st century version of the blackbox. Oh, and checkout my Patreon page to help support these little video explorations :-) https://www.patreon.com/synthtodd"
"Yesterday I pulled out this little blackbox and was delighted that it still worked having been gifted it in the 1980's. I posted a little something on Instagram @synthtodd and immediately a friend posted that that day he had coincidentally been searching for the schematics, he had remembered building one back in the day.
Amazing synchronicity!! Here is his MW thread with more info including the original article from Popular Electronics: https://www.muffwiggler.com/forum/vie...
And . . . Logan Erickson at Low-Gain Electronics & ToneWrecker Devices will be revitalizing this unit soon!!! @lowgain @tonewreckerdevices"
"This is the faithful clone of the Pearl Syncussion SY-1 Drum Synthesizer. Professionally built by Low-Gain Electronics. It is #207 out of a total of 300 made, so they are rare. If you are looking at this listing then you probably already know what it is. Look up some videos online to hear what it sounds like if you are curious. It is in excellent cosmetic and functioning condition. CV gate for trigger and pitch. Original box and a power supply will be included. No other cables in the pictures are included."
