added to allow for two mod sources, mod0 and mod1

[koltenpearson]

For the project I am working on I wanted the ability to have 2 LFOs so I went ahead and added support for it.

If this is not desired then no worries, go ahead and close it.

If this is desired then note I only made the minimal number of changes to support my use case. Specifically I did not try to support python, and I imagine it breaks the examples and tests. I figured I would wait and see if this was wanted before going any farther.

I am willing to add support to the python bindings examples and tests, though I will probably need a little guidance on how you would want the syntax and argument names to be in the interest of backwards compatibility and whatnot.

[bwhitman]

Nice! We'll take a look.

[dpwe]

Nice work.

I am curious about the 2 LFO use case - is it for pitch and envelope at separate rates or something like that?

[koltenpearson]

Yes being able to change both pitch and amplitude/pwm on the same oscillator is the use case I had in mind. It is more for me to experiment with than achieve a specific sound.