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Step 1
Pick a melodic range for the song. You'll need to know your vocalist or instrumentalist's range before choosing a key signature.
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Step 2
Choose the key for your song. First, decide if you want it to be major or minor. Second, pick the key that fits your singer's range.
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Step 3
Listen to songs you admire and learn their chords. This is the best way to become familiar with the standard I-IV-V progression that's the backbone of tonal music.
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Step 4
Write a basic progression that starts with the key's main major chord and leads to the key's dominant chord. Using the key of C-Major as an example, these would be the C and G major chords. This also works for minor keys, as well.
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Step 5
Experiment with the in-between chords. Add your own embellishments to the I-IV-V progression by including augmented, diminished and 7th chords. These give your song its own unique flavor.
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Step 6
Use chords like the major-7th (i.e. C-E-G-B) to give your song a jazzy flavor. For a darker tint, throw in a minor-IV (i.e. F-Ab-C) before returning to the tonic chord (the key's main major chord).






