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Re: Waveform question
Posted: Mon Aug 26, 2013 9:00 am
by Electric_Head
I understand the concept but can't see how it applies to this waveform.
Re: Waveform question
Posted: Mon Aug 26, 2013 9:16 am
by Hollotronic
I made an edit to my post to include this link:
http://www.soundonsound.com/sos/may13/a ... 0513-1.htm
That explains why the waveform would be lopsided.
Re: Waveform question
Posted: Mon Aug 26, 2013 10:35 am
by __________
DC offset. Seen it affect many mixdowns!
High pass filter it at anything above 1Hz. That'll make it go away.
Re: Waveform question
Posted: Tue Aug 27, 2013 3:03 pm
by f1rstsense
Yea its probably the air in out thing for removing the offset didn't seem to change the form that much. And also it is quite a 'sucky' and 'weird' sound imho. (for those wondering check the the first midrange bass sound in the drop of the track i posted in WIP thread, thats the owner of this waveform) -- dont get me wrong i dont mean to fish for feedback just wanting to show off

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Re: Waveform question
Posted: Wed Aug 28, 2013 1:46 am
by MrBaxter
From Hollotronic's Link:
"this natural waveform asymmetry is often attributed to a 'DC offset', but that's not the case at all. A DC offset is a specific fault condition where the varying AC audio signal voltage is offset by a constant DC voltage, and the 'tell-tale' is that, although the waveform might look asymmetrical, a decaying signal waveform settles away (offset) from the centre zero-line."
SOS then goes on to identify the complex phase relationships of harmonically complex sounds as the probable culprit.
"In combining different frequency signals with differing phase relationships, the result is often a distinctly asymmetrical waveform, and that waveform asymmetry often changes and evolves over time, too. That's just what happens when complex related signals are superimposed."
It doesn't have an effect on the stereo image, it doesn't have an effect on the sonic quality, it however does take up more headroom as the waveform will clip earlier than a symmetrical signal at the same relative level.
The way around that is a phase rotator, which shifts the phases of harmonics so that a more desirable waveform can be created, increasing headroom.
Apparently lopsided waveforms are common among vocal sounds, so that could be the problem too.
Re: Waveform question
Posted: Wed Aug 28, 2013 2:16 am
by ARTFX
MrBaxter wrote:Apparently lopsided waveforms are common among vocal sounds, so that could be the problem too.
Have you ever seen waveforms of horn instruments? Almost always lopsided parts in there.
Re: Waveform question
Posted: Wed Aug 28, 2013 4:39 pm
by 6000
Hollotronic wrote:The part of the waveform that is above the line is pushing, and the part below is pulling.
Naaaaaah... where you are on the waveform (above the line, below the line) is the position of the speaker at a certain time. If the waveform is increasing, it's pushing. If it's decreasing, it's pulling.
Re: Waveform question
Posted: Wed Aug 28, 2013 6:07 pm
by Icetickle
So should I go and bounce every element in my track to see if I have this problem even if everything sounds fine?