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4 votes
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Can compressed music files be adequately recovered by remastering?

GIGO [garbage in, garbage out] does apply... ...however - a good mix, master or especially restoration engineer could pull apparent newness out of a low quality file - that's essentially the same ...
Tetsujin's user avatar
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3 votes
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how to list bit depth and bit rate of all. files in a set of nested folders?

SoX (Sound Exchange), the self-described Swiss Army knife of sound processing programs is super-useful for these kind tasks. soxi is the specific tool to list audio file information and on Linux (or ...
tonys's user avatar
  • 171
3 votes
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Bit depth calculation doesn't seem to add up

It's an MP3 file. You can't deduce anything from that other than the fact that it's probably got a bit depth of 16 bits. Try the same exercise but using a WAV file. You will have better luck. MP3 is a ...
Mark's user avatar
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3 votes
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44100 Hz encoded in 24bit vs 16bit

It seems that as defined by the CDDA Red Book, CD quality is 16 bit with a maximum sample rate of 44.1 kHz. I understand 44.1kHz was chosen due to human hearing limitations so I assume 16 bit was ...
Hobbes's user avatar
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3 votes

What frequency/bit depth were the Beatles recorded at?

The article you read has either been misinterpreted or was monstrously misleading. It is possible that what they were referring to was the fact that the frequency response required from an analogue ...
Mark's user avatar
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2 votes

Can compressed music files be adequately recovered by remastering?

Mp3 is a lossy compression format, the removal of frequencies is permanent. There are lossless files such as flac files which 'pack' the file down to a smaller file size that can then be 'unpacked'. ...
Melloj's user avatar
  • 252
2 votes

How to convert a stereo MP3 to mono MP3

On Linux systems like Ubuntu, you can use ffmpeg: ffmpeg -i input.mp3 -c:a libmp3lame -q:a 2 -ac 1 output.mp3 where: -c:a libmp3lame: The audio codec to use -q:a 2: The audio quality (bitrate), see ...
Martin Thoma's user avatar
2 votes

What joint stereo bitrate is equivalent to 64k mono?

Joint stereo is only really useful for actual stereo recordings. What you are recording here (with two microphones on a table) is actually dual-mono, which is very different to "stereo" as there is no ...
Mark's user avatar
  • 8,900
2 votes

What is Tidal's 'Master' Quality sample rate and bit depth?

Fi: 44.1khz/16bit (1411kbps) Master: 96khz/24bit (4608kbps) Pitchfork Article Note that only ~30,000 tracks are MASTER quality right now You can tell that Master is available by the M symbol and ...
neaumusic's user avatar
  • 292
2 votes

MP3 Psychoacoustic Cut-off Frequencies for Low-Bitrate Presets

Here is a tentative answer based on the 192kHz 24-bit Japanese female speech sample: First I generate the test files from the sample file, sample02.wav: for br in 8 16 24 32 40 48 56 64 80; do ...
user19087's user avatar
  • 131
2 votes

MP3 and bitrate

Your assumption that bitrate = bitdepth * channels * samplerate is true for raw PCM encoded audio. It is not true for bitrate reduction encodings, be it lossless (as flac) or lossy (as mp3). The ...
audionuma's user avatar
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1 vote

Bitrate reduction by rounding instead of truncating and dithering

Rounding gives exactly the same sort of quantisation errors as truncation does. You can see this because rounding is effectively the same as adding 0.5 (scaled appropriately) and then truncating.  The ...
gidds's user avatar
  • 111
1 vote

Bitrate reduction by rounding instead of truncating and dithering

The purpose of dithering in audio processing is to hide quantizing noise. In effect the dithering moves hearable noise to frequencys where the ear is less sensitive. Rounding has no effect on the ...
ghellquist's user avatar
  • 1,624
1 vote

Spotting a fake flac using spectrogram

This looks "extended" because of the (most probably) linear scale that your spectrogram is using on the frequency axis. It should look way more common if you switch it to log or similar. @...
ValiumDuPeuple's user avatar
1 vote

44100 Hz encoded in 24bit vs 16bit

The theory around sampling contains quite a bit of mathematics. Leaving that aside, let us look att the practical aspects of your questions. In practice, today, there are only two effects of sample ...
ghellquist's user avatar
  • 1,624
1 vote
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What should be the bit-rate & sample-rate settings, if I were to convert a WebM audio file to MP3?

The audio is encoded using opus, which is a high quality codec. When decoding from Opus, you will likely want to go via PCM - 16 bit at 48000. The more significant parameter with mp3 encoding will be ...
Mark's user avatar
  • 8,900
1 vote
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What frequency/bit depth were the Beatles recorded at?

Looking at the specs of the IBM 2401 tape drive from that era, you can see it's at least more complicated than that. The fastest of the 3 models recorded 90 kbyte/s while running the tape at 112.5 ...
Hobbes's user avatar
  • 1,728
1 vote

What frequency/bit depth were the Beatles recorded at?

There is no way to compare them because one is analog and one is digital. The way to calculate kbps is: bit depth * sample rate * channels Neither vinyl nor cassettes use bit depth or sample rates. ...
Timinycricket's user avatar
1 vote

Can compressed music files be adequately recovered by remastering?

You could take a look at Zynaptiq Unchirp and Unfilter, but they are expensive options. It's not guaranteed to work but it's an option worth demoing. It really depends on how important these files are ...
Dale_G_sound's user avatar
1 vote
Accepted

Compare audio samples with different bitrates

There's no easy way to measure the perceptual differences (i.e. as perceived by an average audience) between different audio encodings or bitrates. The common way to do these tests is ABX tests. ...
audionuma's user avatar
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