Posts Tagged ‘ control voltage ’
Here’s a demo of some software I developed for Tom Erbe’s music software development course at UCSD. The program allows you to generate modular synth control voltages using a standard AC-coupled audio interface. A diode and capacitor are the only required external hardware. The program is written in C++ using the Qt framework. Download the source, documentation and OS X binary here.
The Octomod is now featured in the Projects section of PJRC.com.
I ended up hand-routing the PCB. Here it is, as sent for fabrication.
Here are some images of the pcb for my USB-CV device, made using the Eagle schematic/layout editor.
A closeup of the board, including part of the DAC IC.
Part of the microcontroller, DAC, and opamp.
Voltage regulator, capacitor, and DAC.
Finally, the full layout. Dimensions (in.) are 3.05 x 2.90.
This is a demonstration of the USB -> CV PC/Analog Synthesizer interface I’m developing.
In this clip, sample data is being sent from Max/MSP over the serial port to a Teensy 2.0 microcontroller. The controller sends the incoming data over an ISP connection to a DAC, the output of which can be used as a modulation source for analog synthesis modules.
Computer Generated Control Voltage Generator from Greg Surges on Vimeo.
Musician/hacker living in San Diego, CA. Studying computer music at UCSD. 
