1. What is the MIDI Note to Frequency Conversion?

The MIDI note to frequency conversion calculates the corresponding frequency in Hertz (Hz) for a given MIDI note number. This is based on the equal temperament tuning system where MIDI note 69 corresponds to A4 (440 Hz).

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( Note \) — MIDI note number (0-127)
• 69 — MIDI note number for A4 (440 Hz)
• 12 — Number of semitones per octave
• 440 — Reference frequency for A4

Explanation: The formula calculates how many semitones the input note is from A4 (MIDI note 69) and applies the exponential relationship between frequency and pitch in equal temperament tuning.

3. Importance of Frequency Calculation

Details: Accurate frequency calculation is essential for music production, sound synthesis, instrument tuning, and audio programming. It allows musicians and audio engineers to convert between note numbers and actual frequencies.

4. Using the Calculator

Tips: Enter a MIDI note number between 0 and 127. Note 69 corresponds to A4 (440 Hz), which is the standard tuning reference.

5. Frequently Asked Questions (FAQ)

Q1: What is MIDI note numbering?
A: MIDI uses numbers 0-127 to represent musical pitches, where note 69 is A4 (440 Hz), the standard tuning reference.

Q2: Why is 440 Hz important?
A: 440 Hz is the international standard for the musical note A above middle C (A4), used for instrument tuning and musical reference.

Q3: How does this relate to musical notes?
A: Each MIDI number corresponds to a specific pitch. The formula converts these numbers to their corresponding frequencies in Hertz.

Q4: Can I calculate frequencies for microtonal music?
A: This calculator uses standard equal temperament. For microtonal music, different formulas would be needed that account for alternative tuning systems.

Q5: What are some common MIDI note references?
A: Middle C is note 60, A4 (440 Hz) is note 69, and the highest note is G9 at note 127 (approximately 12543.85 Hz).