Re: [sc-users] Sample synchronous bundle/beats?

[Daniel Mayer <daniel-mayer@xxxxxxxx>]

Am 13.12.2014 um 00:40 schrieb Daniel Mayer <daniel-mayer@xxxxxxxx>:

> 
> Am 12.12.2014 um 19:27 schrieb Stephan Wittwer <stephan.wittwer@xxxxxxxxx>:
> 
>> Maybe I don't understand the problem or the formulation ("separately at any time") ? 
> 
> Because ideally, at every full second we have a multiple of the period length,
> so a separate entry with opposite phase would, again ideally, annul the first signal.
> This doesn't work here either, not even nearby.
> 


Checking now with prepared Synthdef.
EnvGate invents a fadeTime of 0.02 sec.

(
SynthDef(\test, { |freq = 440, iph = 1| 
	OffsetOut.ar(1, SinOsc.ar(freq, mul: iph * 0.5) * EnvGate()) 
}).add;

p = Pbind(\instrument, \test, \freq, 440, \dur, inf);
q = Pbind(\instrument, \test, \freq, 440, \dur, inf, \iph, -1);
)



// try several times, sometimes annulling after 5 seconds, sometimes not
// (tested on osx, core audio, hardware buffer size 512)

Ptpar([0, p, 5, q]).play

I think this is much the same phenomenon as in the RT case here

> http://new-supercollider-mailing-lists-forums-use-these.2681727.n2.nabble.com/sample-accuracy-with-lang-timing-was-Various-timing-issues-td7615278.html



After some seconds within which scheduling is sample-exact
there are jumps, means time is not exactly transformed into samples
according to sample rate. 
If the 5 seconds above fall into such sample-exact window, the signals annul each other.

Greetings

Daniel

-----------------------------
www.daniel-mayer.at
-----------------------------

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