A small clamping inaccuracy in the oto Speaker writer

[ajzaff]

beep/speaker/speaker.go

Line 121 in b573886

valInt16 := int16(val * (1<<15 - 1))

Currently this returns the wrong values for an input of -1.

I believe this should fix it:

valInt16 = int16((-1<<15)+(val+1)/2*(1<<16-1))

https://play.golang.org/p/E-8wkFoIHQ3

[MarkKremer]

Fun fact, in the latest release of Oto the samples get converted back to floats. Maybe a better option to just pass raw float bytes to Oto and skip the conversion altogether.