Filter issue

[Nitride]

Hey fellas, i've been trying to debug my simple synth's filter for a few months now, but the sound is either some diabolical screeching or just plain silence

my hardware circuit (if you can even call it that) is as follows:

Serial MIDI > Arduino (Mega 2560, pin 11) > Amplifier > Speaker

(yes, there are no rc filters or any of the sort, i don't feel like soldering crap again...) 

is this a hardware setup issue or am i just a moron? 

Code attached below:

[Mozzi-users]

Hey there,

just a quick tip without looking really closely - try putting 

rf.setCutoffFreqAndResonance(filterEnvelope.next(), 128);
in updateControl() instead of updateAudio().  

If you're using a faster processor it might work where it is, but I have only ever used it in updateControl().

Cheers

Tim

[Mozzi-users]

And I'd make the filter envelope stuff run at control rate too...

[Mozzi-users]

One more nag - probably worth getting something reeeeaaally simple to work (from an example?) and gradually building from there, to find out where things start going pear shaped...