TelePaul said:
I wish I knew what you menat because it seems you really know your stuff....umm...zero crossing?
Sorry, let me explain better...
When making cuts in any waveform editor like Cubase and butting another clip up against the cut, if no care is taken as to exactly where the cuts and joints are, it's creating a big discontinuity in the path/line of the waveform. If, for example, at the end of one clip the waveform happens to be at an amplitude of -12dB positive (12dB above the center line of the track) and the beginning of the next clip has the waveform starting at -3dB negative (3dB below the center line), there will be an instantaneous jump - or in this case, vertical dive - in the waveform if 15 decibles. It's like a road going over the San Andreas fault where after an earthquake the road on one side of the fault has shifted 15 feet to the north of where the road is on the other side.
This instantanesous jump in the road's position causes cars to have accidents. Such instantaneous jumps in the waveform cause can cause clicks or pops in the worst cases, or in smaller jumps, just simply cause a noticable transition.
"Editing at the centerline" means in this case to make the cut right at the point where the waveform crosses the center line (-inf dBFS) of the rack display. If this is done on both sides of the cut, the waveform voltage will line up on both sides of the cut and there will not be the unnatural vertical jump or dive.
Add to that editing so that the waveform is crossing the centerline in the same direction on both sides - e.g. if it is on it's way down at the end of it's first clip, it should not be on it's way up at the beginning of the second - and you have as clean of a but joint edit as you can.
That in and of itself is not always enough to make a clean transition between cuts, just because of the nature of the sound of the cuts. Like in your case, the changing of oscillation frequency of the instrument from a D to a G or whatever. That's where the crossfades come in. It sounds like what you have done so far is to fade one side out or the other side in but that's not a full crossfade. In order to crossfade, you need to slightly overlap the two clips you're joining. Then you simultaneously fade the outgoing clip out while fading in the incoming clip; hence the term "cross-fade". Just look up the term crossfade in the on-lone help section of your Cugase, it'll give farily simple instructions on how to do this.
For the absolute best results, conbine the two procedures by overlaping the two clips in shuch a way where the centerpoint of the overlap (and therefore the center point of the cross fade) is a location where both waveforms meet at the zero crossing and are travelling in the same direction.
HTH,
G.
