diff --git a/src/ArrayExtensions.ts b/src/ArrayExtensions.ts
index b7d73c1..7a5fc3f 100644
--- a/src/ArrayExtensions.ts
+++ b/src/ArrayExtensions.ts
@@ -1,5 +1,4 @@
 import { type UserAPI } from "./API";
-import { SCALES } from "./Scales";
 import { safeScale } from "zifferjs";
 export { };
 
@@ -374,16 +373,11 @@ Array.prototype.scale = function(scale: string = "major", base_note: number = 0)
 
   // This is a helper function to handle up or down octaviation.
   const mod = (n: number, m: number) => ((n % m) + m) % m;
-
-  if (SCALES.hasOwnProperty(scale)) {
-    const selected_scale = SCALES[scale];
-    return this.map((value) => {
-      const octaveShift = Math.floor(value / selected_scale.length) * 12;
-      return selected_scale[mod(value, selected_scale.length)] + base_note + octaveShift;
-    });
-  } else {
-    return this.map((value) => value + base_note);
-  }
+  let selected_scale = safeScale(scale);
+  return this.map((value) => {
+    const octaveShift = Math.floor(value / selected_scale.length) * 12;
+    return selected_scale[mod(value, selected_scale.length)] + base_note + octaveShift;
+  });
 };
 
 Array.prototype.arp = function(scaleName: string = "major") {
@@ -391,13 +385,7 @@ Array.prototype.arp = function(scaleName: string = "major") {
    * Ajouter documentation
    *
    */
-  const scale = SCALES[scaleName];
-
-  //input protect from unknow scale
-
-  if (!scale) {
-    throw new Error(`Unknown scale ${scaleName}`);
-  }
+  const scale = safeScale[scaleName];
 
   let result = [];
   for (let j = 0; j < scale.length; j++) {
diff --git a/src/Scales.ts b/src/Scales.ts
deleted file mode 100644
index 1850fc3..0000000
--- a/src/Scales.ts
+++ /dev/null
@@ -1,83 +0,0 @@
-export const SCALES: Record<string, number[]> = {
-  major: [0, 2, 4, 5, 7, 9, 11],
-  naturalMinor: [0, 2, 3, 5, 7, 8, 10],
-  harmonicMinor: [0, 2, 3, 5, 7, 8, 11],
-  melodicMinor: [0, 2, 3, 5, 7, 9, 11],
-  dorian: [0, 2, 3, 5, 7, 9, 10],
-  phrygian: [0, 1, 3, 5, 7, 8, 10],
-  lydian: [0, 2, 4, 6, 7, 9, 11],
-  mixolydian: [0, 2, 4, 5, 7, 9, 10],
-  aeolian: [0, 2, 3, 5, 7, 8, 10],
-  locrian: [0, 1, 3, 5, 6, 8, 10],
-  wholeTone: [0, 2, 4, 6, 8, 10],
-  majorPentatonic: [0, 2, 4, 7, 9],
-  minorPentatonic: [0, 3, 5, 7, 10],
-  chromatic: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11],
-  blues: [0, 3, 5, 6, 7, 10],
-  diminished: [0, 2, 3, 5, 6, 8, 9, 11],
-  neapolitanMinor: [0, 1, 3, 5, 7, 8, 11],
-  neapolitanMajor: [0, 1, 3, 5, 7, 9, 11],
-  enigmatic: [0, 1, 4, 6, 8, 10, 11],
-  doubleHarmonic: [0, 1, 4, 5, 7, 8, 11],
-  octatonic: [0, 2, 3, 5, 6, 8, 9, 11],
-  bebopDominant: [0, 2, 4, 5, 7, 9, 10, 11],
-  bebopMajor: [0, 2, 4, 5, 7, 8, 9, 11],
-  bebopMinor: [0, 2, 3, 5, 7, 8, 9, 11],
-  bebopDorian: [0, 2, 3, 4, 5, 7, 9, 10],
-  harmonicMajor: [0, 2, 4, 5, 7, 8, 11],
-  hungarianMinor: [0, 2, 3, 6, 7, 8, 11],
-  hungarianMajor: [0, 3, 4, 6, 7, 9, 10],
-  oriental: [0, 1, 4, 5, 6, 9, 10],
-  romanianMinor: [0, 2, 3, 6, 7, 9, 10],
-  spanishGypsy: [0, 1, 4, 5, 7, 8, 10],
-  jewish: [0, 1, 4, 5, 7, 8, 10],
-  hindu: [0, 2, 4, 5, 7, 8, 10],
-  japanese: [0, 1, 5, 7, 8],
-  hirajoshi: [0, 2, 3, 7, 8],
-  kumoi: [0, 2, 3, 7, 9],
-  inSen: [0, 1, 5, 7, 10],
-  iwato: [0, 1, 5, 6, 10],
-  yo: [0, 2, 5, 7, 9],
-  minorBlues: [0, 3, 5, 6, 7, 10],
-  algerian: [0, 2, 3, 5, 6, 7, 8, 11],
-  augmented: [0, 3, 4, 7, 8, 11],
-  balinese: [0, 1, 3, 7, 8],
-  byzantine: [0, 1, 4, 5, 7, 8, 11],
-  chinese: [0, 4, 6, 7, 11],
-  egyptian: [0, 2, 5, 7, 10],
-  eightToneSpanish: [0, 1, 3, 4, 5, 6, 8, 10],
-  hawaiian: [0, 2, 3, 5, 7, 9, 10],
-  hindustan: [0, 2, 4, 5, 7, 8, 10],
-  persian: [0, 1, 4, 5, 6, 8, 11],
-  eastIndianPurvi: [0, 1, 4, 6, 7, 8, 11],
-  orientalA: [0, 1, 4, 5, 6, 9, 10],
-};
-
-
-// Legacy function, see Array.prototype.scale @ ArrayExtensions.ts
-/*
-export function scale(
-  n: number,
-  scaleName: string = "major",
-  octave: number = 4
-): number {
-  /*
-   * Returns the MIDI note number for the given scale degree in the given scale.
-   * @param {number} n - The scale degree, where 0 is the tonic.
-   * @param {string} scaleName - The name of the scale.
-   * @param {number} octave - The octave number.
-   * @returns {number} The MIDI note number.
-   * /
-  const scale = SCALES[scaleName];
-
-  if (!scale) {
-    throw new Error(`Unknown scale ${scaleName}`);
-  }
-
-  let index = n % scale.length;
-  if (index < 0) index += scale.length; // adjust for negative indexes
-  let additionalOctaves = Math.floor(n / scale.length);
-  return 60 + (octave + additionalOctaves) * 12 + scale[index];
-}
-
-*/