vibrato

[Haible Juergen]

	><< Does anybody know of a simple circuit to produce vibrato on an
input
	>audio signal?  The vibrato I'm speaking of is the pitch-shift kind,
not
	>to be confused with tremolo. >>
	>
	>You can use an analog delay chip (BBD) and modulate its clock with
an LFO.  

Or a Phaser, only that you're using the all pass filtered signal only,
without mixing
the original signal.
The Vibrato of the EMS HiFli does this.

JH.