Control Voltage to Video

  • Hey there,

    I'm working on a project to control parameters in Isadora via Control Voltages. I've got some first results (see in the Video) with DC-Coupled Interface=>Ableton=>SilentWay VST=>OSC=>Isadora.

    My question is: does anyone know a way to directly use a DC-Signal in Isadora e.g. via live capturing? Will there be such kind of functions in the upcoming Isadora Version? Or will Isadora be able to host VST & their GUIs?

    (PS: soundlevelwatcher doesn't work with DC-Signal very well... too slow, inaccurate & doesn't give negative values.)



  • CV has a lot of variations and is an analogue protocol, I cannot see Isadora ever getting the ability read it, especially just through DC coupled audio inputs, and added to the fact that manufacturers use different voltages and ranges. There are many projects that deal with digitising CV data, here is one that is arduino based (which can output midi). There are also a series of Eurorack modules that output midi directly Probably the Eurorack modules are the best and most flexible way to go.

  • might not understand the question but,

    I use Arduinos or the like as AD converter (connected to an USB port) and feed the data through the serial watcher right into Isadora.

    this is not control voltage to video , but makes it possible to control any parameter in Isadora Actors by a choice of dozen of analog CV sources.


  • Thx for your answers!

    Midi is unfortunately for some reasons not useful in my case (low resolution, latency, ...)

    Arduino via serial watcher might be my advice of choice, I'm going to have a look at this.

  • @eddhy if you really want to get some high res and low latency info, you will have to make your own solution. I have made a few tests, and had great luck with raspberry pi. I found some 24 bit 8 channel SPI based ADC chips and wrote some code to send this data over OSC. The last thing I was tinkering with (I did not have time to do this properly and what I did worked well enough) was to crate better analogue prep (using op amps to adjust gains and ranges coming out of different CV outputs). The ADC was great, the OSC was low latency and for what I did it worked fine. I would guess that that a raspberry pi and high res ADC would be a better way to go (it has a much better network stack and lower latency than arduino if you optimise it). 

  • Crazy thought...what if you went CV>DMX>USB??? Soundmachines SY1 to an ENTTEC DMX to USB.