Re: [fluid-dev] Continuous controllers

[Ben Gonzales]

Hi Greg.


On 25/06/16 08:46, FenderBenders wrote:
> Ben, I wonder what happens if you cancel out velocity with negative or zero in 
> modulators and assign breath #2 to velocity and volume. The dynamic in harmonic 
> content is dependent on velocity on many sound modules but having midi 
> monitored the output of the ewi I noticed the note on message long after a 
> series of volume increases.

From my analysis, when the EWI is configured with CC2 and zero 
velocity, what it sends out (for playing a single note) is:

1. A string of CC2s (up to 8 until the pressure is stabilised), then
2. A note-on command with the velocity equal to the current CC2 value, then
3. More CC2s as the note is modulated until the player stops blowing and 
CC2 goes to zero, then
4. A note-on command with the velocity equal to zero (equivalent to 
note-off)

So, the EWI produces only one note-on command per note. If your sound 
module is producing additional harmonic content at high velocities, you 
must be starting the note at high volume, otherwise it wouldn't be 
getting the high velocity message.

If I read you correctly, you are suggesting adding in more note-on 
commands at varying velocities as the CC2 values change? I'm not sure 
what that would do - maybe add more voices? Also, you'd get repeating 
attacks, which might not sound good. I'll try programming that in and 
see what happens.


> I also think the note off message might be unnecessary if the velocity 
> interacts correctly. Of course this is only speculation.

The additional note-off function in my EWI-PI package is a separate 
issue. It is there to combat "stuck notes" only.


Ben


> Sent from Samsung mobile
>
> Ben Gonzales <address@hidden> wrote:
>
> > Hi all.
> >
> > I implemented the CC2 modulator in a sax soundfont, and loaded it into
> > my RPi2 fluidsynth. I set the EWI to CC2 and the velocity setting to
> > ZERO. This makes the EWI produce "dynamic velocity". What I found was
> > that I could start a note at low breath pressure, and resulting low
> > volume, and swell it, but only a bit. If I started a note at higher
> > breath pressure I could swell it more. So, it seems that you can't swell
> > to full volume unless you start with a decently loud note in the first
> > place.
> >
> > In practical terms, you (well, I) rarely need to swell to full volume
> >from nothing, but I just thought I better mention it. Maybe I'm doing
> > something wrong. I did test setting a fixed velocity (mid range), and it
> > seemed to work OK.
> >
> > Ben
> >
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