45 lines
1.3 KiB
Text
45 lines
1.3 KiB
Text
|
TITLE:: Dconst
|
||
|
|
summary:: Constrain a demand-rate stream to a given sum
|
||
|
|
categories:: UGens>Demand
|
||
|
|
|
||
|
|
DESCRIPTION::
|
||
|
|
A demand-rate analog to link::Classes/Pconst::. It outputs values from the child demand stream until the sum of those values reaches or exceeds a given total. The last value will be truncated so that the sum of Dconst's output values will match the total exactly.
|
||
|
|
|
||
|
|
CLASSMETHODS::
|
||
|
|
|
||
|
|
METHOD:: new
|
||
|
|
|
||
|
|
ARGUMENT:: sum
|
||
|
|
The sum to reach. This may be a number, demand UGen or any other UGen. When a Dconst instance resets, one value will be taken for the sum, and it can't be modulated until the next reset.
|
||
|
|
|
||
|
|
ARGUMENT:: in
|
||
|
|
A demand-rate stream, providing the output values.
|
||
|
|
|
||
|
|
ARGUMENT:: tolerance
|
||
|
|
Because of floating point rounding error, it isn't safe to stop only when the output's running sum is equal to the desired total. teletype::tolerance:: is how close the running sum can get to stop the output: code::abs(runningsum - sum) <= tolerance::.
|
||
|
|
|
||
|
|
returns:: A demand-rate stream.
|
||
|
|
|
||
|
|
|
||
|
|
EXAMPLES::
|
||
|
|
|
||
|
|
code::
|
||
|
|
// fast notes of random duration for 0.5 seconds
|
||
|
|
// then a single note for 0.5 seconds
|
||
|
|
(
|
||
|
|
a = {
|
||
|
|
var freq = Duty.kr(
|
||
|
|
Dseq([
|
||
|
|
Dconst(0.5, Dwhite(0.05, 0.08, inf)),
|
||
|
|
0.5
|
||
|
|
], inf),
|
||
|
|
0,
|
||
|
|
// workaround for the lack of Dexprand
|
||
|
|
Dwhite(0, 1, inf).linexp(0, 1, 200, 600)
|
||
|
|
);
|
||
|
|
VarSaw.ar(Lag.kr(freq, 0.02), 0, 0.3, 0.1).dup
|
||
|
|
}.play;
|
||
|
|
)
|
||
|
|
|
||
|
|
a.free;
|
||
|
|
::
|