negative sustain

at0m · Post by **at0m** » Mon Feb 18, 2002 4:12 am

The Sherman filterbank has negative sustain on it's ADSR, never seen this done elsewhere. It provides mastersweeps!

Maybe it's easy to do on DSP, I don't know. I suspect this requires different ADSR, but maybe is can be done via modulation/offsets or something.

http://www.sherman.be did it the analog way, I think he'll be glad to assist when you would try it to!!

Neutron · Post by **Neutron** » Mon Feb 18, 2002 9:32 am

does it just mean that the sustain is below 0 and then the release sweeps UP to zero? if so it would not be too hard.

at0m · Post by **at0m** » Mon Feb 18, 2002 9:52 am

that's correct. I did not mean Env. Inversion, that's done before.

Like in:
'value'(after attack)=100
'value'(after decay) = -50

This new Sustain value will be pos/neg. inverse to Env. Depth, which is the 'value'(after attack).

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at0m · Post by **at0m** » Mon Feb 18, 2002 10:25 am

http://www.sherman.be/extras/manual2en.pdf p. 24-33 explains the ADSR

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Neutron · Post by **Neutron** » Tue Feb 19, 2002 11:44 am

yes it can be done quite easilly.