Music Blue is a nice music related Joomla template for the 1.5 version:
Here is a neat looking free Joomla 1.5 template. Designed nicely featuring an amazing night view of Tokyo. This template features three sections for text information!
A Joomla 1.5 template design featuring 3D graphics of speakers:
A high quality graphic design music Joomla 1.5 Template:
