@function ms-function(
  $v: 0,
  $base: false,
  $ratio: false,
  $thread: false,
  $settings: $modularscale
) {
  // Parse settings
  $ms-settings: ms-settings($base, $ratio, $thread, $settings);
  $base: nth($ms-settings, 1);
  $ratio: nth($ms-settings, 2);

  // Render target values from settings.
  @if unit($ratio) != '' {
    $ratio: ms-target($ratio, $base);
  }

  // Fast calc if not multi stranded
  @if (length($base) == 1) {
    @return ms-round-px(ms-pow($ratio, $v) * $base);
  }

  // Create new base array
  $ms-bases: nth($base, 1);

  // Normalize base values
  @for $i from 2 through length($base) {
    // initial base value
    $ms-base: nth($base, $i);
    // If the base is bigger than the main base
    @if ($ms-base > nth($base, 1)) {
      // divide the value until it aligns with main base.
      @while ($ms-base > nth($base, 1)) {
        $ms-base: $ms-base / $ratio;
      }
      $ms-base: $ms-base * $ratio;
    }
    // If the base is smaller than the main base.
    @else if ($ms-base < nth($base, 1)) {
      // pump up the value until it aligns with main base.
      @while $ms-base < nth($base, 1) {
        $ms-base: $ms-base * $ratio;
      }
    }
    // Push into new array
    $ms-bases: append($ms-bases, $ms-base);
  }

  // Sort array from smallest to largest.
  $ms-bases: ms-sort($ms-bases);

  // Find step to use in calculation
  $vtep: floor($v / length($ms-bases));
  // Find base to use in calculation
  $ms-base: round(($v / length($ms-bases) - $vtep) * length($ms-bases)) + 1;

  @return ms-round-px(ms-pow($ratio, $vtep) * nth($ms-bases, $ms-base));
}