Cakewalk Sonar has a nice, basic, usable sheet music interface. I'm not sure what you're using for sounds. The term 'tracker' as I know it refers to an old dos based grid or text based sequencer. In these programs, you had to specify your samples and it would act like a sampler and provide you with a meand of playing back your samples. Then you mentioned Acid Pro which is a modern loop sequencer. It would be very combersome to stick little audio files o the screen for each note you wanted to play, so I wonder if you have a software sampler already. If you do, you can use it in Sonar. I haven't checked in a while, but Sonar may come bundled with a basic software sampler.

Did that help at all?

Yeah, thanks. I wasn't really clear on the difference between using a program based on loops and one that uses midi instruments. I used the term "tracker" because of Fast Tracker 2, a program I used years and years ago.

Thanks for the help.

Yeah, I did some playing around with Fast Tracker and Impulse Tracker about 10 years ago. Seeing the word 'tracker' really took me back. Thanks for that!

Welcome to RO, by the way! :)