max , dc-coupled outputs, cv

MaxMSP
_ hyena/_'s icon

_ hyena/_

hello forum!
i must start sayng im a total n00b in the maxmsppuredata world.
im on max 5 on a mb with a motu ultralite first version.

i also have a korg ms-20.

i succesfully built a multi-waveform lfo to send to the ms-20 via audio outputs of my soundcard.
it works a charm (but i hav no multimeter to check properly the output voltage, just pluggged, it worked, felt satisfied )

being also unskillful in math and electricity can someone help me understand how to build a proper hzv interface in max to drive the ms-20 oscillators?

thanks in advance!
giona

oli larkin's icon

oli larkin

first you need to work out what signal value in max produces a voltage of 1v. Start at 0. and gradually raise the signal till the multimeter says 1v

then you can use this to convert midi notes 0-128 to the right values for you ms-20, replacing the value 0.2198 with the reading you took for 1v

Max Patch
Copy patch and select New From Clipboard in Max.

oli

_ hyena/_'s icon

_ hyena/_

thanks oli gonna try it right now!

_ hyena/_'s icon

_ hyena/_

by the way, you mean using a cycle~ at various frequency and amplitude values till i reach the 1v ?
and also, when you have the time, can you explain the methods of conversion you applied? so i learn some math too

thanks again

oli larkin's icon

oli larkin

no, you either want to connect a numberbox to a sig~ object or use the numberbox~ object

_ hyena/_'s icon

_ hyena/_

thanks. but i cannot see a numberbox~ object, only a number~ object. is that the one you mean?

oli larkin's icon

oli larkin

that's the one.

_ hyena/_'s icon

_ hyena/_

oli, i love you.
after messin around triyn to understand the multimeter everything worked out and now the cv to vco is PERFECT!!!!
thank you!

(who needs volta ??? )