Hey Colin,
no - this is not possible. If you want to change this, you have to edit the sound samples directly. There are slow speaking pipes, whitch need some time to build up the steady tone. If you need faster speaking, you have to cut some of this part of the sample, where the pipe is building up the steady tone.
But i won't do that. The beauty of Hauptwerk samples is, that they preserve the imperfectness of the pipe speaking.
Best regards - Martin
Does anybody know, how i can Switch off the automatic spelling System of Windows Internet Explorer. This Software means i am writing german and changes occasional the first letter in words to upper case. Very nasty!