Applied Acoustics Systems has announced that it's running a big promotion on Tassman 4, offering it for $99 until the end of July, 2012. That's a $250 discount on the regular price of $349.

Tassman is a rich modular sound synthesis environment based on physical modeling. It brings together realistic emulation of acoustic instruments, analog and FM synthesizers, loop processors, and crazy hybrid creations. Tassman is both a collection of unique synths and effect processors, and a tightly integrated environment which lets you customize patches in any way you wish.