Load non-Sine Waves

[StatsBen]

Currently, Macaron assumes that any waveform being uploaded is a sine wave. A better version of Macaron would read in other wave shapes and approximate them as a sine wave after finding the true frequency.

Perhaps this could be done by finding the frequency of roots in the waveform at each sample point? As long as the mathematical error isn't too large in this approximation of the frequency.

[oschneid]

^ I've thought a bit about this and believe we'll need to think more broadly about how waveform manifests in Macaron. Is it keyframeable? Do we allow common/discrete options (sine, wave, triangle, sawtooth), or store waveform more generally (e.g., as a frequency spectrum)? In each of these cases the import will need to change.