Hi yeah me again - I've got lots on my mind... I wondered if anybody knew how volume rises as more notes are added and how in turn we hear the result. If we take a piano for example that when played in a medium weight fashion on the right hand peaks out at -6db - what if we add the left hand in playing in exactly the same manner thus adding another 3 notes or so. How does the volume increase if at all? Basically I'm getting at the whole fundamental of amplitude - 12 instruments playing at a peak of -6db wont result in an overall volume of -6db - I'm presuming the result to be much more?? Is this peak versus rms? Anybody got any enlightenment here? Thanks alot Alex.