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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

ryclark
ryclark
Participating Frequently
May 18, 2017

hi

SteveG

i have loaded other audio clips and check for clipping tollerance %1

i know there are not clipping sample ,but audition found many and many clipping samples

would like to know what the develop team can say about it

thanks


All you have to do to make sure that there are no clipped samples is to Normalise the audio files to a slightly lower level. -1dB should be Ok but you can go down to -3dB if you want to be absolutely sure. After all there is no real need normally to push your audio within a fraction of a dB of clipping. But at the same time you should be able to see most audio peaks that get anywhere near clipping without having to measure anything I would have thought.

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