Audio level problem -Sound Forge - PC - MAGIX Community Forums Archive

Subject: Audio level problem Posted by: dpvollmer Date:3/22/2005 5:14:25 PM I edit sermons and often use EQ to reduce popping sounds. Typically I will cut starting at around 160 Hz and have absolutely no EQ increases. I have even dropped the output level by .1 to .5 db. Most of the time this works as expected with the only level changes being the cuts in the frequencies I assigned. However sometimes, while it will cut the frequencies I designated, the result is an overall level increase of the remaining frequencies - including clipping. What's up with that? Thanks for your help, David Vollmer
Subject:RE: Audio level problem Reply by: mpd Date:3/22/2005 7:07:06 PM Are you talking about an increase in total signal power or larger short term variations? Any EQ, even cuts, can sometimes result in larger short-term peaks.
Subject:RE: Audio level problem Reply by: Sonic Date:3/23/2005 7:54:51 AM Very sharp filters (EQ) can sometimes exhibit a little ringing (a little bump) right before the cutoff. For very loud material, it is sometimes better to use a less drastic filters multiple times than one very sharp filter once. J.
Subject:RE: Audio level problem Reply by: dpvollmer Date:3/27/2005 6:41:38 PM Sorry to take so long to respond. I've been busy with Good Friday and Easter services. It would seem that setting up multiple filters to eliminate a number of explosive frequencies would be rather time consuming. Can these filters be set up to run within a script or some other SF function. I now have V8 but don't know how to write a script yet. I have several of these pops during a sermon and changing the cardiod lapel mic doesn't seem to help that much, plus the pastor is going to put it pretty much where he feels comfortable with it anyway.

Subject: Audio level problem

Posted by: dpvollmer

Date:3/22/2005 5:14:25 PM

I edit sermons and often use EQ to reduce popping sounds. Typically I will cut starting at around 160 Hz and have absolutely no EQ increases. I have even dropped the output level by .1 to .5 db.

Most of the time this works as expected with the only level changes being the cuts in the frequencies I assigned. However sometimes, while it will cut the frequencies I designated, the result is an overall level increase of the remaining frequencies - including clipping.

What's up with that?

Thanks for your help,
David Vollmer

Subject:RE: Audio level problem

Reply by: mpd

Date:3/22/2005 7:07:06 PM

Are you talking about an increase in total signal power or larger short term variations?

Any EQ, even cuts, can sometimes result in larger short-term peaks.

Subject:RE: Audio level problem

Reply by: Sonic

Date:3/23/2005 7:54:51 AM

Very sharp filters (EQ) can sometimes exhibit a little ringing (a little bump) right before the cutoff. For very loud material, it is sometimes better to use a less drastic filters multiple times than one very sharp filter once.

J.

Subject:RE: Audio level problem

Reply by: dpvollmer

Date:3/27/2005 6:41:38 PM

Sorry to take so long to respond. I've been busy with Good Friday and Easter services. It would seem that setting up multiple filters to eliminate a number of explosive frequencies would be rather time consuming. Can these filters be set up to run within a script or some other SF function. I now have V8 but don't know how to write a script yet.

I have several of these pops during a sermon and changing the cardiod lapel mic doesn't seem to help that much, plus the pastor is going to put it pretty much where he feels comfortable with it anyway.