Transmutation
Level: Bard 1
Components: V
Casting Time: 1 standard action
Range: Personal
Target: You
Duration: 10 minutes/level
When you cast this spell, a familiar and soothing song wells up in your mind.
This spell brings to your mind a song that helps you retain your concentration. The song does not distract you from any task at hand — on the contrary, by humming along to the tune, you can focus your mind with ease. As long as this spell is in effect, you can make a Perform check in place of a Concentration check.
Source: Spell Compendium (Page 227)