[chuck-users] chuck neophyte trying to remove clicks via Envelope patch

[Tomasz Kaye's brain]

If you'd rather not add a second time advance after the keyOff(),
another approach is to set up two banks of sines which take it in
turns to play. You could arrange things so that the release portion of
one set of sines would happen at the same time as the attack portion
of the other set, which would avoid clicks.

On Wed, Nov 25, 2009 at 2:12 AM, Robert Poor <rdpoor at gmail.com> wrote:
> Hi Ryan:
>
> Your code looks about right, but you may need to leave time for the envelope
> to ramp down as well as up.  Try these as the last lines of your while
> (true) loop:
>
>  e.keyOn();
>  1000::ms => now;
>  e.keyOff();
>  1000::ms => now;
>
> or, to make the wait time equal to the ramp time:
>
>  e.keyOn();
>  e.time()::second => now;
>  e.keyOff();
>  e.time()::second => now;
>
> No, I haven't tried it.  Let me know...
>
> - Rob
>
> On 24 Nov 2009, at 17:02, Ryan Wieghard wrote:
>
>> Hello chucKsters,
>>
>> I am trying to write a simple program that reassigns four sine
>> oscillator's pitch and volume at each iteration through a while(true) loop.
>> I decided i didn't want the clicks at the beginning of each note attack,
>> so I thought that I could remove them by just adding an envelope
>> to ramp up to the gain value for each event. After trying different values
>> for the Envelope time and rate, I can't seem to figure out
>> how to remove the clicks. I apologize as this is probably something
>> obvious that I am blind to in my myopic state. My intuition is
>> that if I increased the rate of the envelope the ramp up to 1 would be
>> smoother and then my speakers wouldn't click. However I am
>> unsure how to adjust the rate as I don't know what range it would be in.
>>
>> Sorry for my n00bishness
>>
>> Ryan.
>>
>> SinOsc s1 => Envelope e=> dac;
>> SinOsc s2 => e => dac;
>> SinOsc s3 => e=> dac;
>> SinOsc s4 => e=> dac;
>>
>> //....
>>
>>  while( true )
>>  {
>>  .1 => float t =>e.time;
>>
>>  //reassign gain
>>
>>  Std.rand2f(0,1) => float g;
>>  g => s1.gain;
>>  g => s2.gain;
>>  g => s3.gain;
>>  g => s4.gain;
>>
>>  //reassign pitch
>>
>>  Std.mtof(instrumentSet1[Std.rand2(0,6)]) => s1.freq;
>>  Std.mtof(instrumentSet1[Std.rand2(0,6)]) => s2.freq;
>>  Std.mtof(instrumentSet1[Std.rand2(0,6)]) => s3.freq;
>>  Std.mtof(instrumentSet1[Std.rand2(0,6)]) => s4.freq;
>>
>>  //Advance time by 1 samp
>>  e.keyOn();
>>  1000::ms => now;
>>  e.keyOff();
>> }
>>
>>
>> --
>> "Le savant n’étudie pas la nature parce que cela est utile ; il l’étudie
>> parce qu’il y prend plaisir et il y prend plaisir parce qu’elle est belle."
>> - Henri Poincaré
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>> https://lists.cs.princeton.edu/mailman/listinfo/chuck-users
>
> --:
> Robert Poor
> e:      robert.poor at nbt-ventures.com
> p:      +1 617 818 5115
> b:      http://blog.nbt-ventures.com
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