[dspig]

Yes it's a good decision, and 'the standard' for audio in the same way as 32-bit ARGB makes everything easier for graphics. Of course there are some things that are better done with ints or maybe doubles, like keeping track of the time position, but for the sine wave generator it doesn't need to know how long it's been running in total, just the position in the current cycle, so floats are fine for that.