> From: David Clarke
>
> Paul - from an earlier post (in 2011) there are '9 Star' versions of
> EPROM code also available - these are available/referenced here:
>
> http://www.rhodeschroma.com/?id=2011&month=01#polarissysexbroken

The difference is the way the velocity is applied to the volume envelope
amplitude. (It's not a different velocity curve.) 9∗ has the pre-9
response, which is linear with a small offset, while 9 has a breakpoint in
the curve so that the volume is lower except at max volume:

vel v0-v9 v9∗-v11
--------------------
0 1024 0
| | |
31 8464 3968
32 8704 4096
| | |
63 16144 16000

The vel column is the internal velocity, which is half the MIDI velocity.

I always felt that the old curve was lousy. (It wasn't even "curved".)
MIDI 64 is supposed to be "medium", but it's only 6db below the peak. And
the offset at the bottom made it impossible to go down more than 24db. The
new curve starts at zero, and is 12db down in the middle.

But some people seem to like the old response more. Any comments?

--

Ciao, Paul D. DeRocco
Paul mailto:pderocco@...