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Unison Bend

Strike the two notes simultaneously and bend the lower note to the pitch of the higher.

Pre-Bend

Pre-Bend : Bend the note up 1/2 (or whole) step, then strike it.

Pre-Bend and Release

Pre-Bend and Release : Bend the note up 1/2 (or whole) step,
Strike it and release the bend back to the original note.

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Strike the and bend up 1/2 (or whole) step, then release the bend back to the original note.
All three notes are tied, only the first note is struck.
See the next scales Pre-Bend and Pre-Bend Release

1/2 Bend

1/2 bend : Strike the note and bend up 1/2 step (one fret).

Full Bend

Full Band : Strike the note and bend up a whole step (two fret).