Construct an audio frame a zero-centered value known to be above at almost but not quite the N bit range, e.g. at N=8 bits and a litte. On most platforms, this is exactly the same as fromNBit(), shifting up or down to the platforms' available resolution.

However, on AVR, STANDARD(_PLUS) (where about 8.5 bits are usable), the value will be shifted to the (almost) 9 bit range, instead of to the 8 bit range. allowing to make use of that extra half bit of resolution. In many cases it is useful to follow up this call with clip().

(10, oscilA.next() + oscilB.next() + oscilC.next());