LinLin map a linear range to another linear range
LinLin.ar(in, srclo, srchi, dstlo, dsthi)
LinLin.kr(in, srclo, srchi, dstlo, dsthi)
in - input to convert.
srclo - lower limit of input range.
srchi - upper limit of input range.
dstlo - lower limit of output range.
dsthi - upper limit of output range.