Function interpf

include/rack0.hpp:96–98

	return crossfade(a, b, frac);
}
DEPRECATED inline float interpf(const float* p, float x) {
	return interpolateLinear(p, x);
}
DEPRECATED inline void complexMult(float* cr, float* ci, float ar, float ai, float br, float bi) {
	complexMult(ar, ai, br, bi, cr, ci);
}