RangeTest.scala

class HasRange[U](val lo: Float, val hi: Float)
object HasRange {
  implicit def SinOscHasRange  = new HasRange[SinOsc ](-1, +1)
  implicit def ImpulseHasRange = new HasRange[Impulse]( 0, +1)
}
implicit class GERangeOps[U <: GE](in: U) {
  def range(lo: GE = 0f, hi: GE = 1f)(implicit r: HasRange[U]): GE =
    in.linlin(r.lo, r.hi, lo, hi)

  def exprange(lo: GE = 0.01f, hi: GE = 1f)(implicit r: HasRange[U]): GE =
    in.linexp(r.lo, r.hi, lo, hi)
}

play {
  SinOsc.ar(SinOsc.ar(0.3).exprange(440, 6600)) * 0.1
}