You are about to purchase a unique Activation Key for HarmonyBuilder-Professional, the smart music composition software that helps build perfectly harmonized melodies and chord progressions. This will activate HarmonyBuilder-Professional on one computer only.

The purchase fee is $88. You may use any major Credit Card or PayPal. Note that all information sent from this web page, as well as the payment page, is encrypted and confidential.

Once the purchase is complete, an e-mail containing the Activation Key will be sent to the e-mail address you provide on this page. This e-mail will also contain directions for activating HarmonyBuilder-Professional.