I'm no ad guru, but just some ideas...
If you get decent traffic, you might try
Google AdSense.
Craigs List is HUGE. You could do some advertising in the bigger cities.
Consider a "links exchange drive" where you add a links page to your site and petition other music sites to trade links. Getting more links to your site is very beneficial.
Conventional advertising should be considered also:
On your vehicle
On bus stop benches
Local Newspapers
etc...
Beyond the above you should browse some of these "website marketing" sites:
website marketing - Google Search