| Author |
Message |
christorb
Joined: Feb 09, 2010
Posts: 17
Location: Cambridge, UK
|
 Posted: Mon Apr 26, 2010 11:39 am Post subject:
lfo frequency cutoff controlled by mouse?
Subject description: changing the frequency cutoff of an lfo with mouse movement? |
  |
|
Hi all,
I'm pretty new to Chuck and am just experimenting with it at the moment. I was wondering if there's a way to get Chuck to enable you to control the cutoff of an LFO by mouse movement - perhaps by moving the mouse up, you increase the cutoff, and obviously when you move it down you'd decrease the cutoff...
Thanks,
Chris |
|
|
Back to top
|
|
 |
vrachnasormora
Joined: Mar 22, 2007
Posts: 42
Location: Preveza,Greece
|
| Posted: Mon Apr 26, 2010 12:45 pm Post subject:
|
|
|
Hi Chris, can you please show me your code so far?By cutoff you mean the frequency of a filter modulated by an LFO or the speed of the LFO itself?Show me where you are so I can help you or I can send you some code if you like, but first I need to know what you mean by cutoff.Using the mouse it's very easy to control any parameter.
Andreas |
|
|
Back to top
|
|
|
christorb
Joined: Feb 09, 2010
Posts: 17
Location: Cambridge, UK
|
| Posted: Tue Apr 27, 2010 2:55 am Post subject:
|
|
|
Ok, here's my code -
[10,13,15,12,15,17,16,18,15,13,11] @=> int notes[];
1::second => dur T;
T - (now % T) => now;
int i;
Phasor o1 => HPF f1 => JCRev r1 => dac;
//osc gain
.5 => o1.gain;
//reverb 'amount'
.1 => r1.mix;
//filter frequency
1000 => f1.freq;
//lfo oscillator
SinOsc lfo1 => blackhole;
5 => lfo1.freq;
//infinite loop
while (true)
{
for (0 => int i; i <notes> o1.freq;
150::ms => now;
}
if(Std.randf() > -.01) .01::T => now;
else .01::T => now;
(lfo1.last()*500) + 1000 => f1.freq;
}
What I actually meant was that I'd like to be able to use mouse movement to control the frequency of the filter - my brain wasn't having a good day yesterday! I've got an lfo here, but it doesn't seem to work properly - it changes the filter frequency only after every cycle of notes...
I'm not very good at this stuff :S!
Cheers |
|
|
Back to top
|
|
|
vrachnasormora
Joined: Mar 22, 2007
Posts: 42
Location: Preveza,Greece
|
| Posted: Tue Apr 27, 2010 5:35 am Post subject:
|
|
|
Hi Chris, here I use a variable named center_filter_freq in order to modulate the filter frequency by LFO and by mouse in two diffrerent functions sporked together before the main loop.So if this is what you are after:
| Code: | Hid hid;
HidMsg msg;
hid.openMouse( 0 );
[10,13,15,12,15,17,16,18,15,13,11] @=> int notes[];
1::second => dur T;
T - (now % T) => now;
int i;
Phasor o1 => HPF f1 => JCRev r1 => dac;
//osc gain
.5 => o1.gain;
//reverb 'amount'
.1 => r1.mix;
//filter frequency
1000. => float center_filter_freq;
//lfo oscillator
SinOsc lfo1 => blackhole;
5 => lfo1.freq;
spork~ lfo_to_filter();
spork~ mouse_to_filter( 500, 5000 );
//infinite loop
while (true)
{
for (0 => int i; i <notes> o1.freq;
150::ms => now;
}
}
//if(Std.randf() > -.01) .01::T => now;
//else .01::T => now;
fun void lfo_to_filter()
{
while ( true )
{
(lfo1.last()*500) + center_filter_freq => f1.freq;
100::ms => now;
}
}
fun void mouse_to_filter( float min, float max )
{
while ( true )
{
hid => now;
while ( hid.recv( msg ) )
{
if ( msg.isMouseMotion() )
{
if ( msg.deltaY )
{
if ( msg.deltaY <0> center_filter_freq;
if ( center_filter_freq > max )
max => center_filter_freq;
}
if ( msg.deltaY > 0 )
{
10 -=> center_filter_freq;
if ( center_filter_freq <min> center_filter_freq;
}
<<<center_filter_freq>>>;
}
}
}
}
} |
|
|
|
Back to top
|
|
|
vrachnasormora
Joined: Mar 22, 2007
Posts: 42
Location: Preveza,Greece
|
| Posted: Tue Apr 27, 2010 5:51 am Post subject:
|
|
|
I'm sorry I forgot to disable HTML in the previous post.So that would be:
| Code: | Hid hid;
HidMsg msg;
hid.openMouse( 0 );
[10,13,15,12,15,17,16,18,15,13,11] @=> int notes[];
1::second => dur T;
T - (now % T) => now;
int i;
Phasor o1 => HPF f1 => JCRev r1 => dac;
//osc gain
.5 => o1.gain;
//reverb 'amount'
.1 => r1.mix;
//filter frequency
1000. => float center_filter_freq;
//lfo oscillator
SinOsc lfo1 => blackhole;
5 => lfo1.freq;
spork~ lfo_to_filter();
spork~ mouse_to_filter( 500, 5000 );
//infinite loop
while (true)
{
for (0 => int i; i <notes.size(); i++ )
{
Std.mtof(notes[i]) => o1.freq;
150::ms => now;
}
}
//if(Std.randf() > -.01) .01::T => now;
//else .01::T => now;
fun void lfo_to_filter()
{
while ( true )
{
(lfo1.last()*500) + center_filter_freq => f1.freq;
100::ms => now;
}
}
fun void mouse_to_filter( float min, float max )
{
while ( true )
{
hid => now;
while ( hid.recv( msg ) )
{
if ( msg.isMouseMotion() )
{
if ( msg.deltaY )
{
if ( msg.deltaY < 0 )
{
10 +=> center_filter_freq;
if ( center_filter_freq > max )
max => center_filter_freq;
}
if ( msg.deltaY > 0 )
{
10 -=> center_filter_freq;
if ( center_filter_freq < min )
min => center_filter_freq;
}
<<< center_filter_freq >>>;
}
}
}
}
} |
|
|
|
Back to top
|
|
|
christorb
Joined: Feb 09, 2010
Posts: 17
Location: Cambridge, UK
|
| Posted: Tue Apr 27, 2010 6:15 am Post subject:
|
|
|
That's cool  , I can hear the effect of moving the mouse on the filter cutoff, though for some reason the notes have disappeared, replaced by what seems to be a rapid series of impulses. Would it be better do you think to remove the lfo, and just have the mouse control the filter frequency cutoff?
Sorry, I know I'm a bit of a noob with all this! |
|
|
Back to top
|
|
|
vrachnasormora
Joined: Mar 22, 2007
Posts: 42
Location: Preveza,Greece
|
| Posted: Tue Apr 27, 2010 6:32 am Post subject:
|
|
|
| Well it seems that you also forgot to disable HTML in your post with the code so I modified the main loop with Std.mtof but of course the values in the array are low for midi notes ( I guess ) so they could be heard as pulses.You don't need to remove the lfo ,its contribution is subtle |
|
|
Back to top
|
|
|
christorb
Joined: Feb 09, 2010
Posts: 17
Location: Cambridge, UK
|
| Posted: Tue Apr 27, 2010 7:30 am Post subject:
|
|
|
Ah, yeah - the notes were too low! This is exactly what I was looking for!
Might see if I can get something else going with the x axis of the mouse too...
Many thanks |
|
|
Back to top
|
|
|
Antimon
Joined: Jan 18, 2005
Posts: 4145
Location: Sweden
Audio files: 371
G2 patch files: 100
|
| Posted: Tue Apr 27, 2010 11:09 am Post subject:
|
|
|
Just want to mention that ChucK can actually identify several different mice (at least in my experiments on the Mac). Example:
mouse 1 Y controls cutoff of a filter
mouse 1 X controls resonance of same filter
mouse 2 Y controls frequency of oscillator 1
mouse 2 X controls frequency of oscillator 2
You do this by incrementing the argument to hid.openMouse(), so hid.openMouse(0) accesses one mouse and hid.openMouse(1) accesses another.
/Stefan
_________________
Antimon's Window
@soundcloud @Flattr home - you can't explain music |
|
|
Back to top
|
|
|
|
Forum index » DIY Hardware and Software » ChucK programming language
FAQ
Calendar
Search
Memberlist
Usergroups
Register
Profile
Log in to check your private messages
Log in
Chat Room
