Applied Acoustics Systems has announced a Monster Splash Summer Deal for its flagship synthesizer Tassman 4, offering it for $99 USD.

Tassman is an extremly rich modular sound synthesis environment based on physical modeling.

It is both an impressive collection of unique synths and effect processors, and a tightly integrated synthesis studio which lets you customize instruments in any way you wish or even create your own from scratch.

Tassman 4 for Windows and Mac (VST/AU/RTAS/Standalone) is available to purchase for $99 USD until the end of July 2012 (regular $349 USD).