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Checker 0.96 and bit rate in the file name question.

Posted: July 23rd, 2020, 1:12 pm
by DeBug
Some (all?) the 2 or 3 recordings I've completed required *_128kb.mp3 in the file name. Checker v0.96 throws a Validation error saying standard names should not include the bit rate information. Just ignore this right?

Kind regards,

DeBug

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 23rd, 2020, 1:19 pm
by TriciaG
I had to test this out for myself, because I've never seen that error message in Checker. It apparently shows up when you have it set for "strict" validation.

Yes, please ignore that. It has been a requirement for a while now, in order to properly derive the files over at Archive.org (where are files are hosted). :)

You can probably just stick with "gentle" validation all the way around.

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 23rd, 2020, 3:03 pm
by DeBug
Cool. I'll put it back to Gentle.

Thank you!

DeBug

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 28th, 2020, 5:38 am
by dg73
I have a question on the checker. I am a broadcast engineer IRL and have used quite a few DAW's and am used to measuring audio levels from a reference. For ex NPR wants production levels to be -24db LUFS (loudness units full scale) +- 2 db for submission, for consistent loudness. Where is the 86 to 92 referenced from? Is it db above noise floor?

Just curious.Thanks.

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 28th, 2020, 5:45 am
by TriciaG
I'm pretty sure Checker measures it from... zero, because when you run noise reduction, the measured volume decreases.

This, of course, doesn't give the absolute best results, since people's noise is different. But we're not overly technical/professional here. We developed somewhat freely, as did the technicals such as volume requirements. :)

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 28th, 2020, 5:56 am
by GrayHouse
Yes, it's relative to 0 dB SPL, not the noise floor. All the gory details are here.

I know LUFS are all the fashion but FWIW I think that ReplayGain is still a good standard and it works well for Librivox.

Re: Checker 0.96 and bit rate in the file name question.

Posted: July 28th, 2020, 5:50 pm
by dg73
Very good. I never saw that page description or used replay gain before. Thanks much.