ExtendedStrings\Harmonics\Cent

Complexity

Total Complexity

3

Size/Duplication

Total Lines	25
Duplicated Lines	0 %

Coupling/Cohesion

Components	0
Dependencies	1

Importance

Changes

0

2 Methods

Rating	Name	Duplication	Size	Complexity
A	frequenciesToCents()	0	4	2
A	centsToFrequency()	0	4	1

<?php

declare(strict_types=1);

namespace ExtendedStrings\Harmonics;

class Cent
{
    /**
     * @param float $lower
     * @param float $upper
     *
     * @return float
     *   The number of cents between the two frequencies.
     */
    public static function frequenciesToCents(float $lower, float $upper): float
    {
        return Math::isZero($lower) ? 0 : 1200 * (log($upper / $lower) / log(2));
    }

    /**
     * @param float $cents
     * @param float $base
     *
     * @return float
     */
    public static function centsToFrequency(float $cents, float $base): float
    {
        return $base * pow(2, $cents / 1200);
    }
}