Re: [chuck-users] How to ramp pitch?

That's just what I was looking for. Thanks, Stefan! Sent from my iPhone

On May 22, 2014, at 5:36 PM, Stefan Blixt wrote:

You can try to use Step into Envelope. This is dry coding, and I've had a few beers, but:

Step s => Envelope e => SinOsc s => dac;

1 => s.next; 0 => s.sync;

220 => e.value; 440 => e.target; 1::second => e.duration;

2::second => now;

...

On Thu, May 22, 2014 at 10:55 PM, Moisés Gabriel Cachay Tello wrote: I haven't ChucKed for a while, but this can help

Pseudocode:

actual_pitch = 440 new_pitch = 880 delta = 1 // -> Increment between steps

while(actual_pitch != new_pitch) if (actual_pitch > new_pitch) delta = -1 // if we're decreasing pitch actual_pitch = actual_pitch + delta //This would be the freq setting advance 1ms

2014-05-22 15:39 GMT-05:00 Bonnie Eisenman :

...

Hi all, sorry if this question has been answered before, but I can't find it in the docs.

I'd like to ramp a pitch quickly from one frequency to another. I feel like there should be a better way to do this than what I'm currently using, which is this:

// Where length is the # of milliseconds this should take for (0 => int i; i < length $ int; i++) { f1 - ((i/length) * (f1 - f2)) => float newFreq; osc.freq(newFreq); 1::ms => now; }

This works but it produces an unfortunate clicking noise at the end (and yup, I'm using an envelope). Any tips?

Thanks!

--Bonnie

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