Positive Grid has announced a limited time discount on three of its Expansion Packs for JamUp, the guitar and bass multi-fx app for iOS.

Enjoy the 4th of July with the FREEDOM of TONE! FIVE DAYS only, get 20% OFF our three most popular JamUp Expansion Packs – Effects, Classic and Metal.

Get these massive models from the largest iOS Tone Farm on the planet. You also get to experience the NEW TONE SHARING feature in the latest release of JamUp Pro XT!

Don’t wait cause once this deal is gone, it’s gone! Download the JamUp app for FREE at the App-Store.

The expansion packs are available to purchase (in-app) for $7.99 USD each until July 9th, 2012.

More information: Positive Grid