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34: Pitch & Frequency

Detailed Contents


Lesson 34: Pitch & Frequency

This lesson explains what musical pitch "actually is", i.e. what happens in the physical world to make a pitch, and how we measure pitch.

First, a brief definition of sound: Sound is what happens when an object vibrates or "shakes"; the shaking object makes the air shake; and the shaking air makes your ear shake. Note that these "sound shakes" are too weak, and too fast, for your body to feel them, which is why we have ears that can feel them, as sound.

However, not all sounds have pitch. When the air shakes back and forth ("vibrates"), over and over, at a constant speed, long enough for your ear to "measure" the speed, that's when you hear a pitch. Slow vibrations make "low" pitches; fast vibrations make "high" pitches.

A pitch is measured by its frequency, which just means its "speed" in vibrations per second. Vibrations-per-second is also called Hertz; the abbreviation for Hertz is Hz. For example, the pitch "A above middle C" has a frequency of 440 Hz; that means that it's vibrating back and forth 440 times in a second.

If you understand pitches and their frequencies, then you can go on and learn how a single musical tone contains multiple frequencies, in Harmonics.

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1: Introduction
2: Practicing Songwriting
3: Pitch Names
4: Letters Game
5: Sharps & Flats
6: Half-Steps
7: Whole-Steps
8: Steps Game
9: Scales
10: Major Scale 1-2-3
11: Major 1-2-3 Games
12: Major Scale 1-5
13: Major 1-5 Games
14: Chords: Major Triads
15: Major Triad Games
16: Minor Triads
17: Minor Triad Games
18: Major Scale 1-8
19: Major Scale Games
20: Scales Above 8
21: What Next
22: Keys
23: Roman Numeral Chords
24: Diatonic Triads
25: Using Diatonics
26: Tonic Function
27: Subdominant & Dominant
28: Diatonic Function Analysis
29: 7th Chords
30: 7ths Games
31: Treble Staff
32: Treble Staff Game
33: Melody: Chord Tones
34: Pitch & Frequency

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