Arduino Midi to CV

[Project_2501]

I glanced the previous threads on Arduino MIDI to CV builds and was wondering if anyone has an up and running one to share with a stripboard layout, or even a breadboard example for testing, before I beginner like myself try to build one easily

Just got into the world of DIY synth, Slowly but surely. Was looking into buying a kit for MIDI to CV for my ever ending dream of modules to play with. Arduino looks fun, and CHEAPER!

Thanks once again for an helpful forum, any help at all would be greatly appreciated.

[Hammer]

The most cheapest decision: https://janostman.wordpress.com/cheap-diy-usb-midi-to-cv-interface/

[Project_2501]

Thank you a million! Can't wait to make one.

[LFLab]

By all means make it yourself, don't order it from DSPsynths, not a lot of positive experiences ordering stuff from Jan Ostman (although the two times I myself ordered something, I eventually got what I paid for).

[Project_2501]

About to code Janost's DSP MIDI2CV DIGISPARK thingy, but I'm a novice to programming.

https://janostman.wordpress.com/cheap-diy-usb-midi-to-cv-interface/

Has anyone have the completed code ready for upload??? It would help out a lot or even better help figure out the author's notes to complete the programming. Here are the notes to add to the provided code. I'll link the code below.

To be able to receive MIDI from the host, the file DigiMIDI.h requires some modification.

Add this to the function usbFunctionWriteOut:

void usbFunctionWriteOut(uchar * data, uchar len) {

uint8_t note=data[2]; //Get note for key on/off
if (note<36>60) note=60; //If note is higher than C7 set it to C7
if (data[1] == 0x90) { //If note on
digitalWrite(5, HIGH); //Set Gate HIGH
OCR1A = note<<2; //Multiply note by 4 to set the voltage (1v/octave)
}
if (data[1] == 0x80) { //If note off
digitalWrite(5, LOW); //Set Gate LOW
OCR1A = note<<2; //Multiply note by 4 to set the voltage (1v/octave)
}

}

And this is the MIDI2CV.INO sketch:

#include <DigiMIDI>

DigiMIDIDevice midi;

void setup() {
pinMode(1,OUTPUT); //Pitch is output
pinMode(5, OUTPUT); //Gate is output
//Setup Timer1 to do PWM DAC for Pitch
TCCR1 = _BV(PWM1A) | _BV(COM1A1) | _BV(CS10);
GTCCR = 0;
OCR1C = 239;
OCR1A = 0; //Set initial Pitch to C2
digitalWrite(5,LOW); //Set initial Gate to LOW;
}

void loop() {
midi.update(); //Check if any MIDI data is received
}



Code File: https://github.com/heartscrytech/DigisparkMIDI/blob/master/DigiMIDI.h

[MapacheRaper]

Hi,

Im in the same boat as you. Did you built it? It worked?

[Project_2501]

I have not completed it but here is the code for the ATtiny85 chip, Thankfully an other member sent me this code.

Life gets away from building my dream synth. Happens, but moving forward. One piece of the puzzle at a time

Code is attached, Enjoy

---

midi to cv code.txt
Description:		Download (listen)
Filename:	midi to cv code.txt
Filesize:	18.58 KB
Downloaded:	655 Time(s)

---

[MapacheRaper]

Cool. Thanks!!

I have found a project in case someone find it useful. Its a kit with 4 gates, 4cv outs and costs around 30USD:

http://midimuso.co.uk/forums.html/cv-12/

I have been talking with the designer and he claims it has a 5 cents of pitch of precision, which seems ok, isn´t?. Or it is not enought? Not really sure

[gabbagabi]

I was almost hitting the "BUY" Button,
then i saw: only one pcb in stock!

This is for you, hurry up
I can wait.

Usually iam quite against buying SDIY, but for this price and the given functionality....
It would be really interesting if someone can beat that!

[MapacheRaper]

That´s really considerated... Thanks!

So I have ordered one.

However, there´s at least another one in stock in ebay, and I think I saw more in tindie, so don´t hesitate to order!