[-] More about 3310 and envelopes

[Christian Hofmann]

On Wed, 15 Nov 2000 14:13:36 -0000
"Tony Allgood" <oakley at techrepairs.freeserve.co.uk> wrote:

> I have tried this on a more traditional ADSR, and it works well, but for
> one important thing. I wanted to use this method of amplitude control to
> adjust the modulation for different velocities. If you set the ADSR to
> have a long release, and press one note again and again at different
> velocities, you get a major problem. If the cap is still charged up to a
> higher level than the new incoming attack peak, all hell breaks lose.
> The decay phase never gets initiated and the envelope itself doesn't
> sound natural. Does the OB suffer from this, or does the velocity not
> control the modulation depth direct. If the depth is only changed at the
> patch level, then this wouldn't be a problem.

I don't think the OB-8 is velocity sensitive at all.

In fact, I have given up using the MIDI In, because at least my OB-8 tends
to completely lock up (dead front panel) after some time being played by
a sequencer. Maybe it's due to its very early MIDI implementation.

It has been tempting me for quite some time, but suspect I'm too lazy to
get the Z80 disassembler out, and have a look if it can be fixed. But
then - it really would be so nice to have something like an advanced
OB-8, similar to what Rudi Linhard did/does with the MemMoog. 
This however would require some mods to the voice circuits to inject
velocity/aftertouch/controller specific control voltages, including
beefing up the DMUX scheme. Clearly nothing to be quickly done on two
evenings while watching TV...

Christian