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<?php
declare(strict_types=1);
namespace ExtendedStrings\Strings;
class Harmonic
{
private $halfStop;
private $baseStop;
/**
* @param float $halfStop
* @param float $baseStop
*/
public function __construct(float $halfStop, float $baseStop = 1.0)
if ($halfStop > $baseStop) {
throw new \InvalidArgumentException("The half-stop's string length cannot be longer than the base stop's.");
}
$this->baseStop = $baseStop;
$this->halfStop = $halfStop;
* @param \ExtendedStrings\Strings\VibratingString $string
*
* @return float
public function getSoundingPitch(VibratingString $string): float
// Transpose the half-stop onto the new string length, which was formed
// by the stop.
$pseudoString = new VibratingString($string->getStoppedFrequency($this->baseStop));
$pseudoHalfStop = $this->halfStop / $this->baseStop;
return $pseudoString->getHarmonicSoundingFrequency($pseudoHalfStop);
* @param int $limit
* @return float[]
public static function getSeries(int $limit): array
$series = [];
$base = 0;
for ($denominator = 1; $denominator <= $limit; $denominator++) {
$base = $series[$denominator] = $base + 1 / $denominator;
return $series;
extended-strings /
strings
