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JohnVo
JohnVo
Inspiring
May 16, 2017
Answered

calculate entire RMS of an audiofile ,are audio statistics accurate?

  • May 16, 2017
  • 1 reply
  • 3320 views

hi

about are the audtio statistics of an entire audio file accurate ?

reading a forum about it , i have read

it's impractical to calculate the true RMS of the entire file, so most algorithms do some time-windowing and take an average-of-RMS values (or maybe an RMS-of-RMS values if that makes sense mathematically). So... two different applications may report two slightly different RMS values.

&

and, the average may  also be an average-of-averages over the length of the file.

is it true?

thanks

This topic has been closed for replies.
Correct answer SteveG_AudioMasters_

Giovannivolontè  wrote

 

is it true?

Yes.

Now what?

1 reply

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community ExpertCorrect answer
Community Expert
May 16, 2017

Giovannivolontè  wrote

 

is it true?

Yes.

Now what?

JohnVo
JohnVoAuthor
Inspiring
May 17, 2017

it's impractical to calculate the true RMS of the entire file

&

Yes.

Now what?

hi

so audtio statistics is almost unless

i use to find out the peak amplitude & the minimum rsm ampliture

these value are misleading aren't they?

for example i working on this audio , i watch the value with the red arrows

sIJ6xi3.png

thanks

SteveG_AudioMasters_
Community Expert
SteveG_AudioMasters_Community Expert
Community Expert
May 17, 2017

hi

i use to fix manually clipping , noise (speech records ) and son

i use to add markers and work on them

may i know Steve if you use and when?

thanks SteveG


Giovannivolontè  wrote

i use to fix manually clipping , noise (speech records ) and son

i use to add markers and work on them

may i know Steve if you use and when?

The RMS statistics won't help you fix anything to do with clipping. If you want to fix that, you use Diagnostics and the de-clipper setting to determine and mark them.

Personally I don't have to do this for myself, because I don't ever record anything that hot - quite deliberately. About -12dB is about the highest level I ever encounter, so clipping isn't an issue. The only times I ever encounter clipped audio is if somebody sends it to me to see if I can fix it.

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