Why Does Music Only Use 12 Different Notes?

This is a great video about tuning and notes and….everything.

Videos

Zinn Practice Regimen III (592.7 KiB, 52,857 hits)
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Zinn Practice Regimen (211.9 KiB, 20,275 hits)
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Breckerisms - Michael Brecker Type Patterns (379.6 KiB, 15,068 hits)
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II-V-I Patterns in Bb (4.6 MiB, 12,510 hits)
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II-V-I Patterns Reference (600.9 KiB, 12,109 hits)
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II-V-I Patterns in Eb (4.7 MiB, 11,716 hits)
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II-V-I Patterns in Bb Pages 1 to 100 (1.7 MiB, 11,500 hits)
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II-V-I Patterns in Bb Pages 201 to 289 (1.6 MiB, 11,001 hits)
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II-V-I Patterns in Bb Pages 101 to 200 (1.9 MiB, 10,986 hits)
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II-V-I Patterns in Eb Pages 201 to 289 (1.6 MiB, 10,924 hits)
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Zinn Practice Regimen III (592.7 KiB, 52,857 hits)
You do not have permission to download this file. Go register first.
Zinn Practice Regimen (211.9 KiB, 20,275 hits)
You do not have permission to download this file. Go register first.
Breckerisms - Michael Brecker Type Patterns (379.6 KiB, 15,068 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Bb (4.6 MiB, 12,510 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns Reference (600.9 KiB, 12,109 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Eb (4.7 MiB, 11,716 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Bb Pages 1 to 100 (1.7 MiB, 11,500 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Bb Pages 201 to 289 (1.6 MiB, 11,001 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Bb Pages 101 to 200 (1.9 MiB, 10,986 hits)
You do not have permission to download this file. Go register first.
II-V-I Patterns in Eb Pages 201 to 289 (1.6 MiB, 10,924 hits)
You do not have permission to download this file. Go register first.