I e-mailed the folks at iRig/Sample Tank. Emphasis mine, in the response: FWIW, I did get the free version of SampleTank and it does allow you to hear all the other instruments they have available, but not do anything else with them. As almost always, the sax is abysmal. The clarinet is OK. The flute is OK. The (Harmon, I think) muted trumpet is almost perfect.