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shepard tones

Date1997-10-13 15:35
Fromjames@maths.ex.ac.uk
Subjectshepard tones
owner-csound-outgoing wrote
>From owner-csound-outgoing Mon Oct  6 14:33:03 1997
From: owner-csound-outgoing
Date: Mon, 6 Oct 97 14:33:03 GMT
Message-Id: <20335.9710061433@maths.exeter.ac.uk>
To: owner-csound-outgoing
Subject: BOUNCE Csound: Non-member submission from [Matt ]

>From mjs@vpsyc.psychology.nottingham.ac.uk Mon Oct  6 15:32:58 1997 remote from 
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Date: Mon, 6 Oct 1997 15:31:21 +0100 (BST)
From: Matt 
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To: csound
Subject: Shepherd Scales
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I've been playing around doing something like a Shepherd tone scale using
multiple band pass filters to create the illusion of a constantly rising
filter.  It occurred to me that someone has probably already done this? 
I've been using between 4 and 8 bandpass filter all moving upwards, fading
in from around 100hz and fading out at about 6KHz.  I'm having a lot of
trouble getting it to loop properly without audible glitches.  I read
something about this a long time ago but I don't remember where so I've
been sort of making it up as I go along.  Has anyone got any example
scores/orchestras they could let me have? 

Thanks

Matt


-- 
James Andrews, maths CDO, ext.3977