1. What is the Note to Hertz Conversion?

The Note to Hertz conversion calculates the frequency of a musical note based on its MIDI note number using the A4=440 Hz standard. This is fundamental in music technology and audio engineering.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( f \) — Frequency in hertz (Hz)
• \( n \) — MIDI note number (0-127)
• 69 — MIDI note number for A4 (440 Hz)
• 12 — Number of semitones per octave

Explanation: The formula calculates how many semitones the note is from A4 (440 Hz) and applies the exponential relationship between frequency and pitch.

3. Importance of Note to Frequency Conversion

Details: This conversion is essential for music synthesis, tuning instruments, audio programming, and understanding the relationship between musical pitch and physical frequency.

4. Using the Calculator

Tips: Enter the MIDI note number (0-127). Middle C is note 60, A4 is note 69 (440 Hz).

5. Frequently Asked Questions (FAQ)

Q1: Why is A4 set to 440 Hz?
A: 440 Hz is the international standard for concert pitch, established in 1939 to standardize musical instrument tuning.

Q2: How does this relate to piano keys?
A: MIDI note 21 = A0 (lowest piano note), MIDI note 108 = C8 (highest piano note).

Q3: What's the frequency range of human hearing?
A: Typically 20 Hz to 20,000 Hz, though this varies by individual and decreases with age.

Q4: Can I calculate frequencies for non-standard tunings?
A: Yes, by changing the base frequency (e.g., use 432 instead of 440 for "scientific tuning").

Q5: How accurate is this calculation?
A: Mathematically precise for equal temperament tuning, which is the standard for modern Western music.