osmd-extended/src/MusicalScore/Interfaces/ITransposeCalculator.ts

import {Pitch} from "../../Common/DataObjects/Pitch";
import {KeyInstruction} from "../VoiceData/Instructions/KeyInstruction";

export interface ITransposeCalculator {
    transposePitch(pitch: Pitch, currentKeyInstruction: KeyInstruction, halftones: number): Pitch;
    transposeKey(keyInstruction: KeyInstruction, transpose: number): void;
    getTransposedKeyString(keyInstruction: KeyInstruction, halftone: number): string;
}