BlumFollowBalance | SuperCollider 3.13.0 Help

Description

Analyze the balance of a stereo signal. Balance is the distribution of power along the L-R axis.

Class Methods

.ar

.kr

Arguments:

in	The stereo input, an array: [L, R]
size	Number of samples for Hilbert window (i.e. FFT size) or running sum. See RunningSum and HilbertW for more info. NOTE: For instantaneous analysis, size must be a power of two!
method	`\instant` for instantaneous analysis or `\average` for time-averaged analysis

Returns:

Stereo balance: a value on the interval [-1, 1]. The bounds correspond respectively to power fully in the right or left channel.

position	left	center	right
value	`1.0`	`0.0`	`-1.0`

Examples

(
~balanceTest = {
    var in, out;
    var lfo;
    var instant, average;
    var makeUpDelay;
    var size = 2048;
    var halfSize = (size / 2).asInteger;

// Inputs
    in = SinOsc.ar(440);

// LFOs
    lfo = SinOsc.kr(0.3);
    // lfo = 1;  // fixed, left
    // lfo = 0;  // fixed, center
    // lfo = -1;  // fixed, left

// create time-varying stereo input
    in = Pan2.ar(in, lfo);

// Instant and average output
    instant = BlumFollowBalance.ar(in, size, \instant);
    average = BlumFollowBalance.ar(in, size, \average);

// match delay of instant and average for comparison
    makeUpDelay = ((halfSize * SampleDur.ir) - ControlDur.ir);
    average = DelayN.ar(average, makeUpDelay, makeUpDelay);

// Select one: compare instant vs average
    out = instant;
    // out = average;
    // out = (instant.neg + average); // difference between instantaneous and average

// write analyzed angle to post window
    out.poll(label: "analyzed");

// listen to source
    in

}.play()
)

helpfile source: HelpSource/Classes/BlumFollowBalance.schelp
link::BlumBox/Classes/BlumFollowBalance::

BlumFollowBalanceExtension

Description

Class Methods

.ar

.kr

Arguments:

Returns:

Examples

BlumFollowBalance
Extension