This result was expected, based on where I posted the survey. This won't change the design or architecture of the app too much, but I will keep in mind that it is somewhat likely that most of the people using this app will be between 25-34 years old.
This result supports including a recorder function in the app, as most people would need some way to record an acoustic instrument. It could also be used to support including MIDI instruments, as there was a significant portion of the respondents who make electronic music as well. At this point, more information will be needed to support including MIDI.
I asked this question to get an idea of how necessary an app would be, rather than a piece of desktop software, or even analog hardware. Based on these results, it seems that it's safe to move forward with creating an app prototype.