@julian said:
Thanks Martin,
But when I play for example a 3 note repeated sequence (under the influence of the sostenuto pedal) this has a different sound than when exactly the same 3 notes are played repeatedly with the sustain pedal. This you would expect as in the first instance although the 3 played strings are un-damped the remainder of the strings are damped so do not create the sympathetic vibrations you would get with the sustain pedal.
But I guess trying to re-create this would ever multiply the number of required samples.
Julian
the sostenuto pedal is like a third hand keeping pressed some keys for you, so the sound is the same as if you play that notes with your hand and keep it on the keys.
The sound doen't change if the key damper is up because of your hand or because of the sostenuto pedal.
That's why you don't need different samples.
Sergino
In my example the sound is different because (if you open the lid of the piano you can see that physically it is different!) the repeated notes in my example a simple three note sequence C, E, G are struck the sostenuto pedal is then depressed, then the notes are struck again with the sostenuto pedal remaining depressed.
The sound is of three repeating notes with a sustained tone, however the dampers remain ON across all the other strings i.e. the remainder of the piano is damped. This creates a different sound than if the Sustain (damper) pedal is pressed because in that case, although the same notes are being played, ALL strings are undamped and create sympathetic resonances colouring the sound in a different way.
That's why I was stating the difference between sustain and sostenuto samples. anyone with a piano (with Sostenuto pedal) can try it themselves!
Julian