17 votes

FLAC compression level comparison/efficiency analysis

FLAC compression levels are (only) a trade of between encoding time and file size. The decoding time is pretty much independent of compression rate. In the following I will refer to the compression ...
  • 371
8 votes

Compressor vs Volume

It's important to remember that a compressor does not make a sound louder, it reduces dynamic range. By bringing down the peak values, you give yourself more headroom to bring up the overall signal ...
  • 14.8k
5 votes
Accepted

is there a common low-end level for a song?

Here, is there any common low-end level that every song should has? No or Does it just set by ear? Yes. In fact, it should be set by ear, not by eyes. Don't bother with what the spectrum analyzer ...
  • 2,120
5 votes
Accepted

Which acoustic spectogram shows higher quality of audio file?

What you are asking is impossible to determine from a spectrogram. Spectrograms indicate frequencies present, not the quality of the audio. There may be loss of fine detail in one that would barely ...
  • 8,122
4 votes
Accepted

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 ...
  • 7,762
3 votes

Applying compression to a sound several times

It can actually be a very good idea to put two or more compressors (with different parameter settings) in sequence. For instance, limiting1 can allow you to make drums louder, but it tends to make ...
3 votes

Will stereo compression affect stereo image?

As you specify using a 'stereo linked compressor', neither the timing relation or the level differences between both channels should be modified. Therefore, the stereo width should be unaffected. That'...
  • 2,784
3 votes
Accepted

Mid/side multiband compression

Multiband Compression is not something Standard.Most of the time it's a complex procedure but you have to keep in mind that you are doing this to a whole mix which means your dB reduction should be ...
  • 1,519
3 votes
Accepted

Making loud sounds louder but leave under threshold

I think what you are looking for is an expander, here's a link that explains it Quoted here: Audio expansion means to expand the dynamic range of a signal. It is basically the opposite of audio ...
  • 46
3 votes
Accepted

Are FLAC audio files automatically decompressed by music players?

Yes. Without decompression a flac file contains just pseudo-random data. A media player requires an ordered stream of PCM stereo audio samples in order for them to be converted to analogue audio via a ...
  • 8,695
3 votes
Accepted

The function of attack,release and threshold in a compressor

Briefly, threshold is the level at which the compressor is triggered, attack is how quickly the compressor reacts to the trigger, and release is how long the compressor stays activated before ...
  • 46
3 votes

FLAC compression options unclear: --exhaustive-model-search, --qlp-coeff-precision-search

They give a small improvement to the compression at the cost of encoding time. As neither requires specifying --lax, they do not make the resulting files less compliant. -8e, -8p and -8ep could be ...
2 votes

Why does a FLAC file have a lower bit rate than the CD file?

FLAC is a lossless audio encoder so the bitrate is nothing other than an indication of the compression ratio FLAC has been able to achieve. Since FLAC is not allowed to change the material at all, ...
2 votes

File format and settings for speech recording with small file size and keeping a decent quality

Ogg Vorbis doesn't suffer from much of the horriffic issues that occur with MP3, and generally produces smaller files. Hi Quality Voice Recorder will do what you want. If you need smaller, obviously ...
2 votes

Calculating compression output with a knee

After a bit more looking into it and experimenting I've found that the middle equation should be replaced with xG - ((R - 1)/R)(xG - T + W/2)^2/(2W) And it works correctly
2 votes
Accepted

How to use multiband compressor in Mixing and Mastering?

The concept of multiband compression can be easier understood when you think of them as multiple compressors packaged into one device. They are just like single compressors in the sense that they are ...
  • 136
2 votes
Accepted

Is it possible to mix MP3 Files into an audio mix a long mp3 without degredation?

There are programs that can split and concatenate MP3s without re-encoding. So one thing you could do is to split a few seconds off every MP3 at the beginning and end, apply your cross-fades to them (...
2 votes

Is it possible to mix MP3 Files into an audio mix a long mp3 without degredation?

To my knowledge, this is not possible. To add and crossfade audio data requires to decode the mp3 binary stream to pcm, then re-encode to mp3 the resulting pcm stream if you want an mp3 output. As ...
  • 2,784
2 votes

Compressor vs Volume

I'm honestly not sure what you are asking here. Compression does not increase the "volume" of a signal, it decreases it. Compression makes a quiet portion of the sounds louder relative to a louder ...
  • 8,122
2 votes

Audio Leveler Isn't Stable

There's Way too much to go into here, about leveling audio, and as I haven't heard the audio clip, I will keep it short. The speech leveller is probably causing the problem and you may not be using ...
  • 2,441
2 votes
Accepted

How can I fix robotic distortion from an audio track?

Buffer underrun might have caused that distortion to the audio. Buffer values can be increased in the audio driver section of the software or DAW you're using so that the issue disappears when ...
  • 844
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'. ...
  • 242
2 votes

Mixing advice - let me know your opinion

Firstly, align your mixing environment to a technical level using pink noise and a sound pressure level meter. There are various articles on how to do this .... for example. Secondly, listen to lots ...
  • 8,695
2 votes

mixing bass issues

This is actually a classic mistake most people do. And it really affects the outcome. Most of the times it's the plugin , the harmonic content added by the plugin OR the beef in that particular Hz ...
  • 1,519
2 votes

How to avoid killing headroom when mixing action scenes?

It's not so much that you compress to limit the headroom [although TV & Home Theatre releases can often be compressed because the full dynamic range of a theatre movie tends to annoy the ...
  • 7,762
2 votes
Accepted

Which kind of dynamics processor is this (inverse expander, reverse compressor)?

You talk about increasing gain below threshold. An upward compressor does this. You mention "inverse expansion" - this is normally called an upward expander (sometimes called an "uncompressor"), and ...
2 votes
Accepted

Multiband Compressor or Octave-Band Filter plugin

What you're looking for is incredibly hard to implement. Filters always have a slope measured in dB/Octave or dB/Decade and it's a measure of the attenuation of frequencies beyond the cutoff frequency....
  • 1,563
2 votes

Which acoustic spectogram shows higher quality of audio file?

Best audio quality is difficult to assess objectively. What you can say from the given audiograms is (as you mentioned) that N° 3 includes more high frequencies, which is usually considered better. ...
  • 2,784

Only top scored, non community-wiki answers of a minimum length are eligible