import { MIDINoteNumber } from '../types';
/**
 * Check if a MIDI note is a black key
 */
export declare function isBlackKey(midiNote: MIDINoteNumber): boolean;
/**
 * Get the note name from MIDI number
 */
export declare function getNoteNameFromMIDI(midiNote: MIDINoteNumber): string;
/**
 * Get MIDI note number from note name (e.g., "C4" -> 60)
 */
export declare function getMIDIFromNoteName(noteName: string): MIDINoteNumber;
/**
 * Calculate the x position of a key on the keyboard
 */
export declare function getKeyXPosition(midiNote: MIDINoteNumber, startNote: MIDINoteNumber, whiteKeyWidth: number): number;
/**
 * Get the width offset for black keys
 * Black keys are offset relative to their white key neighbors
 */
export declare function getBlackKeyOffset(midiNote: MIDINoteNumber, whiteKeyWidth: number): number;
/**
 * Count white keys in a range
 */
export declare function countWhiteKeys(startNote: MIDINoteNumber, endNote: MIDINoteNumber): number;
/**
 * Convert MIDI note number to frequency in Hz
 */
export declare function midiToFrequency(midi: MIDINoteNumber): number;
/**
 * Get all notes in a range
 */
export declare function getNotesInRange(startNote: MIDINoteNumber, keyCount: number): MIDINoteNumber[];
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