Hi list

Here is an example I made

http://www.yourfilelink.com/get.php fid=11751

Mono material is subjected to an all pass filter (1). Dry signal is passed
to the left channel, and phase shifted one to the right channel

When you hear that the sound is centered, the cutoff point is either above
or below the range of hearing, or outside the range of the sounds themselves

esa

>From: Florian Anwander < Florian.Anwander@... >
>Reply-To: Doepfer_a100@yahoogroups.com
>To: Doepfer_a100@yahoogroups.com
>Subject: Re: 1 getting a wider sound.
>Date: Fri, 27 Jan 2006 11:07:39 +0100
>
>Hi Esa
>
>the usage of an allpass-filter for stereo spreading causes a not mono
>compatible signal (sound will be unhearable in kitchen radio and
>AM-radio and will cause failures when pressing vinyl).
>
>Florian
>
>esa kotala wrote:
>
> > Applying an all pass filter to the other channel might be more
>attractive
> > choice since you do not have to subject the sound to the limited
>bandwidth
> > of the BBD module. All pass filters have 90 degrees of phase shift at
>the
> > cutoff frequency -- the largest possible expansion. Modulating the point
> > could provide an interesting stereo effect
>