[linux-audio-dev] Re: Correct sustain pedal emulation (midi hold controller) ?

[vanDongen/Gilcher]

On Monday 27 October 2003 15:08, Benno Senoner wrote:

>Assume I press C2 with velocity 50 pedal up, the C2-pedalup (associated 
>to velocity 50) sample sounds.
>Now I press the sustain pedal and press C2 with velocity 100.
>What should the sampler do ? Quickly fade out the C2-pedalup 
>(velocity-50) note and trigger the
>C2-pedaldown (velocity 100) note ?
>And of course when you release the pedal all sustained notes will get a 
>note-off.

I am a piano player. 
I would expect the C2 note to be replaced with the next attack on that note.
If the pedal is pressed, the damper stays up, so the next attack will be the 
hammer hitting the strings, and the sounding note is not faded out before.
So I think you should fade out the previous note after or on the attack of the 
next one. Maybe even a lot later. There is an adding resonance effect if you 
keep hitting the same note with the pedal down, but that is probably the 
sympathetic vibrations from the other strings.

If the pedal is not pressed the damper returns to the string as the key is 
released to play the next attack. You will get a note off message then 
anyway.

Note that releasing the pedal should only send note-off to those notes that 
are sounding, but whose key is not pressed. If you have keys pressed down, 
the dampers will be up, regardless of the position of the sustain-pedal. So 
these should continue. I have no idea if digital piano's actually do this 
correctly, but it is the way a accoustic piano works.



Gerard



electronic & acoustic musics-- http://www.xs4all.nl/~gml