wave - Sine Oscillator - for audio frequency

I'm looking to create several sine waves on a single circuit. All must be under 20Khz frequency and each must be unique. Mostly it will be 5-10 frequencies needed.

As I found - almost all crystal oscillator are in Mhz frequencies and only one kind is 32Khz (which is still too high).

I should be able to get this wave on the other side using FFT.

Ideas? :)

Thanks

Answer

You could easilly divide the 32KHz crystal frequency with a Binary Counter (such as the 4040) to give 16KHz, 8KHz, 4KHz, 2KHz, 1KHz, 500Hz, etc...

Then some clever filtering can create a sine(ish) wave from each of those square waves.