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Thread: After encoding verify written audio

  1. #1
    dBpoweramp Enthusiast
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    After encoding verify written audio

    Hi, I rip all my cds in flac (compression level 8) in secure mode & accurate rip and clear read cache with fua & c2 errors pointers.

    For the moment the case : "After encoding verify written audio" is unchecked

    I would to know if it is necessary to verify written audio after encoding or not

    Thanks for help

  2. #2
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    Re: After encoding verify written audio

    It verifies that the encoding to flac files was done properly. Turn it on, it slows things down a bit but it's just another accuracy check that will give you peace of mind.

  3. #3

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    Re: After encoding verify written audio

    I don't notice any difference when checking the Verify box when ripping to FLAC.

    It doesn't appear to do anything.

    And I don't even see a Verify check box for LAME (MP3).

  4. #4
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    Re: After encoding verify written audio

    Lossy codecs cannot be verified as the data stored is not exact 1:1 of the source.

  5. #5
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    Unhappy Re: After encoding verify written audio

    Quote Originally Posted by Jeff Flowerday View Post
    It verifies that the encoding to flac files was done properly. Turn it on, it slows things down a bit but it's just another accuracy check that will give you peace of mind.
    When exactly does it decompress the flac file and verify the written audio. I' ve used it with and without and haven't noticed a difference time wise. I assume it would then have to compress the file back to flac, which would involve additional time. I'm just not seeing how it could be doing this and not taking any longer to rip than w/o the box checked.

  6. #6
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    Re: After encoding verify written audio

    At the end of writing, it would only take about 2 seconds.

  7. #7

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    Re: After encoding verify written audio

    Quote Originally Posted by Spoon View Post
    At the end of writing, it would only take about 2 seconds.
    Two seconds to decompress and compare is incredibly fast; is this per track or for a typical CD? Can you please explain the the mechanism used to verify the written audio - MD5 Checksum? Also, how does one know whether the written audio has actually been verified? As far as I can see there is no confirmation and nothing is written to the log file, is there an option to turn confirmation on.

    Thanks.

  8. #8
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    Re: After encoding verify written audio

    Per track. MD5 checksum. There is only a log if verification fails.

  9. #9

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    Re: After encoding verify written audio

    Quote Originally Posted by Spoon View Post
    Per track. MD5 checksum. There is only a log if verification fails.
    So spoon if i converted WAV files to flac without the verify button, i can still verify it with the original wav files and flac files with the CRC Calculation right ?
    So its basicly the same as the verify option correct?
    Just calculate CRC from Flac and original WAV and if everything is the same its also been verified or does that verify does something else to ?

  10. #10
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    Re: After encoding verify written audio

    Yes. Also the flac files have an inbuilt CRC so once you are sure they are correct, convert the FLAC files to Test conversion, any errors would show at the end.

  11. #11

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    Re: After encoding verify written audio

    Quote Originally Posted by Spoon View Post
    Yes. Also the flac files have an inbuilt CRC so once you are sure they are correct, convert the FLAC files to Test conversion, any errors would show at the end.
    Thanks for all this info your da man spoon, dbpoweramp is the best program ever.

  12. #12
    dBpoweramp Enthusiast
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    Re: After encoding verify written audio

    Bonjour,

    Now if we use Perfect Tunes to verify the ripped files, is it always necessary to check the case "After Encoding Verify Written Audio" or not ?

  13. #13
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    Re: After encoding verify written audio

    It is not required.

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