When converting from WAV to FLAC, how can I know that the conversion is actually lossless?
>>55339744
Convert from FLAC back to WAV, export the raw PCM from both the transcoded WAV and the original WAV, diff the raw data
>>55339753
How do I do that? Can something like audacity do it?
Compression levels
libFLAC uses a compression level parameter that varies from 0 (fastest) to 8 (smallest). The compressed files are always perfect, lossless representations of the original data. Although the compression process involves a tradeoff between speed and size, the decoding process is always quite fast and not very dependent on the level of compression.
>>55339817
FLAC is specifically designed for efficient packing of audio data, unlike general-purpose lossless algorithms such as DEFLATE, which is used in ZIP and gzip. While ZIP may reduce the size of a CD-quality audio file by 10–20%, FLAC is able to reduce the size of audio data by 40–50% by taking advantage of the characteristics of audio.
>>55339768ffmpeg -i $1 tmp.flac
ffmpeg -i $1 -f s16le -acodec pcm_s16le original.pcm
ffmpeg -i tmp.flac -f s16le -acodec pcm_s16le transcoded.pcm
md5sum original.pcm
md5sum transcoded.pcm
$1 is your input file.
>>55339744
If you can't tell the difference why does it matter?
Use your ears.
>>55340621
>if (you) can't tell.
Speak for yourself, bro.
Do you even have cable elevators?
>>55340776
>how can I know
Clearly OP can't tell
>>55339744
good album
>>55339744
>how can I know that the conversion is actually lossless
if you cannot hear any loss, then whether there is any or not, it does not matter
>>55341321
rip cd to mp3 and flac.
play mp3 and flac on phone/earbuds.
can't tell difference
burn cd from flac and cd from mp3
play both on a good stereo.
noticeable difference.
hook phone to good stereo tape input with 3.5mm to rca adapter.
compare cd to phone playing mp3.
absolute haram.
You can check the audio hash.
>>55339744
>I don't want my software to lower the quality of my audio for my listening enjoyment
>I need a software to tell me if the audio lost quality
>>55340621
For when new lossy formats come out and you transcode your music.
check the hashes of the decompressed, raw data, for example;for i in a.*; do echo $i\:;ffmpeg -i "$i" -c:a pcm_s16le - 2>/dev/null | sha1sum; done
>>55339744
It's a lossless format. How could the conversion possibly not be lossless?
Well, interestingly enough, I actually tried it out and it seems that it doesn't produce identical output.
Maybe it's because ffmpeg is old?
>>55344801
Image diff on the right. It seems that the differences have some sort of pattern.
Anyway, what this means for you, OP, is that if you're using ffmpeg N-50911-g9efcfbe on Windows, you might not have actual lossless output.
