That's the one! Cheers John

On Sun, 26 Aug 2018, 12:57 John ff, <jpff@codemist.co.uk> wrote:

Could you be thinking of scanned synthesis?

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On Aug 26, 2018, 12:18, at 12:18, Peter Burgess <pete.soundtechnician@gmail.com> wrote:
>Am I right in remembering there are some mass spring model opcodes in
>Csound somewhere? I've gone through the manual and tried googling, and
>I
>can't find one, but I'm sure I remember using one in the past
>
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I'll check that out, cheers.

Out of interest, the scanu parameter:

ifnstif -- ftable that contains the spring stiffness of each connection. It should have the same size as the
square of the intended mass number. The data ordering is a row after row dump of the connection matrix
of the system.

numberOfMasses^2 number of connections will surely also connect the mass to itself won't it?