Hey guys, forgive me if I'm posting in the wrong place, but I have a talent for understanding audio very well. I just finished implementing a sequencer and a synthesizer in C, just for fun. Now that I'm done, I feel pretty good about this project, and I feel like there's no reason not to keep going, but I don't know what to work on next. I love free software, so I'd love to fill in the gaps that may cause a person to prefer to buy a proprietary synthesizer over downloading a free one. Do you have any ideas?

Thanks.