Experiment with 32 partials

[bgins]

The additive synth currently uses 16 partials. We may be able to get away with using 32 partials, which would create a richer sound and demonstrate partial retuning more effectively.

Try adding 32 spectra and listen for how the audio holds up. If it works, consider how this will change the UI. Do we display two tables with 16 partials side-by-side? One long table?