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Topic: DC Offset from Studio Recording (Read 6241 times) previous topic - next topic
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DC Offset from Studio Recording

Lately I've been getting studio recording tracks with DC offset. All this time I always remove the DC offset before processing the tracks.

However, now I wonder if this should be done? And if so, should I remove the offset before or after processing?

Inputs greatly welcomed.

DC Offset from Studio Recording

Reply #2 –
No no no, you missed the point...

I've already been removing DC Offset using Adobe Audition (nee CoolEdit Pro) on the tracks I receive from recording studios, to post-process, remix, and compile.

What I want to know is whether I should or should not perform DC Offset removal. From your posting I guess I should.

This brings us to the 2nd question: whether to remove DC Offset before or after post-processing.

DC Offset from Studio Recording

Reply #3 –
A very low lowpass would have the same effect.

DC Offset from Studio Recording

Reply #4 –
Yes but (1) it's slower and (2) it modifies the subwoofer's response.

It's quite simple actually with Audition, just use Amplify/Fade and choose the Center Wave preset.

But back to my question: Should I perform it before or after post-processing... guess I'll do it before. Unless anyone can give me a reason not to...

DC Offset from Studio Recording

Reply #5 –
Quote from: pepoluan on
Yes but (1) it's slower and (2) it modifies the subwoofer's response.

It's quite simple actually with Audition, just use Amplify/Fade and choose the Center Wave preset.

But back to my question: Should I perform it before or after post-processing... guess I'll do it before. Unless anyone can give me a reason not to...

I can't see the difference between doing it before vs after. The real question is, is there an actual audible change after you remove it. I've tried to abx the difference before with little success.

DC Offset from Studio Recording

Reply #6 –
A bit late
DC offset correction should be possible to add when converting wav to lossless (FLAC, TAK, APE, WavPAck etc).
Would be nice if all these major lossless formats had this as an option, optional.

Is there any tool that can do this on multiple wav files?
I currently do this in SoundForge 7 but it takes to long, so I only do it on old audio.
I noticed one time before if the audio volume is at max, it can cause small clips but that seems to be rare cuz it only happend to me once.

DC offset can also make the silent sound areas sound cuz it changes the wave form.
For example at start, usually the first 100-300ms and the same at the end where there is total silence.
So I always mute this, takes a bit too long to check every ms, well not every but I try to be close.
Also, sometimes when muting the totall silent areas after DC offset correction, you can do DC offset correction again... 

DC offset info take from Sound Forge 7 help file


EAC Offset, this is the same thing, right?


Is this the same thing as EAC\Tools\Process WAV\Process File\Correct DC Offset?

DC Offset from Studio Recording

Reply #7 –
No.

DC Offset from Studio Recording

Reply #8 –
Quote from: pepoluan on
This brings us to the 2nd question: whether to remove DC Offset before or after post-processing.

DC offset should be removed. It depends on what processing you are applying. For example, noise reduction do not perform well on audio with DC offset. When I get my hands on a file that I haven't made, the first thing I do is statistical analysis. Then DC corection, if needed, and then everything else.
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