Using Manipulate to vary the frequency of a sound produced by SoundNote[]

I have tried various ways to combine Manipulate and Sound/SoundNote that would allow me to vary the frequency of a sound while it is being produced. The addition of Dynamic didn't help, but did increase the variety of error messages. Is this just not possible?

Manipulate[EmitSound[Sound[SoundNote[n, 3]]], {n, 0, 10}]

My goal to listen to, or observe, the beat frequencies produced as a tone becomes closer to or further away from twice the frequency of a second, steady tone. My underlying issue is to develop insight into how original idea of an octave.

Answer

The reason you are getting error messages is because you need to constrain the values of the SoundNote to integers. For instance:

 Manipulate[EmitSound[Sound[SoundNote[n, 3]]], {n, 1, 10, 1}]

works fine.

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