Questions tagged [compression]

Compression is the process of lessening the dynamic range between the loudest and quietest parts of an audio signal

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Bitrate and format (aac/mp3/ogg) for ripping CDs near-losslessly

I have a large CD collection that I'd like to rip to a digital format for my phone I don't think I have room for everything on my phone if I use FLAC, so I'd like to use a lossy format, with a high ...
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What is this new End-to-End Neural Audio Codec?

Soundstream is a new neural audio codec capable of efficiently compressing voice, music, and general audio at bitrates normally targeted by custom speech codecs. SoundStream is based on a model ...
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Are there any programs that can ‘losslessly’ do range compression on MP3 files? (Or other lossy-compressed formats)

I occasionally bump into audio with ‘whisper and explosions’, namely podcasts and audiobooks—and need to do range compression to listen more comfortably. I can do that with a variety of apps that ...
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Can you improve compression of multiple similar songs? [closed]

You probably heared of tar. It combines multiple files/directories into a single archive. After that one can compress this archive with gzip, zstd, xz, etc. If compressing similar files, the ...
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How to interpret the spectogram from spek [closed]

I compressed the wave file to MP3 in two bitrates. How to interpret spectrogram results? WAV: MP3 320 kb/s: MP3 128 kb/s:
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How do I cope with "spikes" in voice over

A speaker sent me totally unprocessed voice over recording. In this recoring, one can see "spikes". What is the usual way to deal with these? Thank you!
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How do you set each stage of compression when using 3 or more compressors in a DAW?

I have a hardware FMR Audio Really Nice Compressor (RNC) that uses 3 stages of compression. It gets me really good results in recording live theater, where the audio levels go from a stage whisper to ...
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Automate pre-processing of sound (noise reduction, compressor, limiter)

I use Audacity to pre-process sound before mixing the takes. I have found good settings for the relevant effects (noise reduction at 24 dB, compressor at 6:1, soft limiter at -10 dB) and the rest is ...
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Reasonable compressor settings for radio and podcasts

I am moving from software engineering to audio production. I read a good deal about audio editing (mostly from Transom.org) and I want to produce audio for both radio at -24 LUFS and podcasts at -16 ...
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Decompressing a track during mastering?

I was watching the video for Skrillex's Mumbai Power where he famously shows Izotope's Insight reading -3.7 LUFS for a short portion of the track before the second drop: ...
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FLAC compression options unclear: --exhaustive-model-search, --qlp-coeff-precision-search

I have bought some music online, delivered in WAV format, presumably highest quality, supposing there was no transcoding happening, but anyway, straight to my question: My intention is to get at least ...
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The function of attack,release and threshold in a compressor

I would like to know how threshold,attack and release act in a compressor.Any information regarding this would be well appreciated.Thanks in advance.
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How do I compress 32-bit float PCM a perfectly lossless way?

I've got some 32-bit float WAV files which contain music and some valuable inaudible signal (different in each of the 2 channels) mixed into it which is important to preserve. The nature of the signal ...
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Normalize audio above a sound level in audacity

I'm trying to figure out a way to manage background noise in audio without having to resort to noise reduction. I'm using audacity to post-process spoken audio. The levels are pretty low, with peaks ...
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Why does compressing a kick drum make it sound punchy and louder?

Let's say I have a kick track. I put a compression effect on it with settings: Threshold: -20 dB, Ratio: 1:4, Attack: 1ms, Release: 20ms, Makeup Gain: 0dB. Since it's a compressor, I expect it co ...
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Why does my voice over sound like it's been reduced in quality when I Compress it?

I'm recording audio for a video essay with Audacity and a Blue Yeti microphone. The microphone is held by a stand and it's got a pop filter. I've watched a few YouTube tutorials like this one on ...
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Are FLAC audio files automatically decompressed by music players?

Suppose I have a compressed version of a song in .flac format that I want to listen to using a music player. Since flac is a lossless audio format, I know that the original (uncompressed) song can be ...
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Best speech codec for quality and compatibility

My company works with audio recordings of phone conferences. We record those as WAV then convert them to MP3 for storage. The stored MP3 files are the ones users globally can download. The problem is,...
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Any reason to use MP3 over AAC?

All information I found online indicates that AAC is superior to MP3 in every aspect, having better sound quality at lower bitrates/file sizes etc. So is there any reason to ever use MP3 instead of ...
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Is there a way to find the degree of compression used in a recording

I have recorded a live choir performance using typical compression parameters. Is there a way to find how much compression was used, and at which points?
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Making loud sounds louder but leave under threshold

It appears I'm looking for a reverse compressor. I want to have sounds under a threshold stay untouched but if it's over the threshold I'd like to make it even louder. Is this a compressor? Could ...
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limiter settings for recording dialog

I need some help with getting the best release time for my Zoom F8's DIGITAL limiters. I know they don't actually limit the analog audio, and that the AD Converters are clipping, but I at least want ...
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What is the difference between Vorbis and Opus?

I would like to split up an audio stream (32bit floats) to chunks, encode them with a lossy compression and then decode it in the other side. I have no experience with audio codecs, so I started to ...
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How to connect dbx 286s and dbx 266xs to Behringer DX2000USB Mixer

This is my first question here. Thank you for your help! Much appreciated! I run a small online EDM radio station on a Mac mini running Radiologik DJ and NiceCast and I have been using the Behringer ...
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Which acoustic spectogram shows higher quality of audio file?

I have three acoustic spectograms of different copies of the same song: MP3; 320 kbps; 9.20 MB M4A (AAC); 256 kbps; 7.46 MB; Converted from 1. audio file via iTunes M4A (AAC); 225 kbps; 6.87 MB ...
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Multiband Compressor or Octave-Band Filter plugin

I am looking for an octave-band filter which will allow me to adjust the individual gains of each octave band in the range 63 Hz - 8 kHz (8 bands) with as close to a brickwall response as possible (i....
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FLAC compression level comparison/efficiency analysis

I want to rip/archive all my music collection to a lossless but compressed file format, i.e. the files should all be perfect, lossless representations of the original data but should consume less ...
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Which kind of dynamics processor is this (inverse expander, reverse compressor)?

You set a threshold at a certain level, specify a ratio of 4:1 and then for every 4 dB below the threshold, the output signal is boosted by 1 dB. Which tool/technique can be used to achieve this? ...
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2 votes
1 answer
126 views

What is the correct way to use multi band compression in a studio setting?

I use compressors quite often and I am quite familiar with their use to control dynamics but I haven't really got a good enough grasp of multi band compression. From what I understand, the equivalent ...
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Understanding The Effect Of Attack On The Dynamic Range Of A Compressed Signal

When downward compression is applied with a slower attack, I'm struggling to understand how the dynamic range of the signal as a whole is reduced. If the signal is a bass hit for example, where the ...
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Compare audio samples with different bitrates

Even though I'm not a professional audio/video editor I'm trying to reach a good balance between quality and file size for movies and TV Shows, mostly very old, I have on my computer so, maybe, I ...
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Audio compression and/or EQ for general podcast recording software

I’m building general podcast recording software for users who are generally unfamiliar with audio. What is the best default configuration that I can provide for a dynamics compressor, filters, and/or ...
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How to avoid killing headroom when mixing action scenes?

I was watching the Bluray of 13 Hours: The Secret Soldiers of Benghazi that day, and I am wondering how to avoid killing headroom when mixing action scenes like those in the movie. There were gunshots,...
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Connect compressor directly to PC sound card

Imagine that you have: A microphone (XLR) Audio compressor (Behringer MDX2600) PC internal sound card (like Creative Sound Blaster Z) Is it possible to connect it like this?: Mic(XLR) > Compressor ...
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mixing bass issues

I have problems mixing my bass composed by 4 notes in 4/1 (E3, B2, C#3 and A2 - scale of EMAJ) as the last note sounds much lower than the others. When I try to compress the channel that note won't be ...
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Mixing advice - let me know your opinion

I'm producing a big room house track with ableton and was looking for some mixing advice: basically the different sounds don't glue together completely, like the bass and the leads are quite separate ...
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optimal way to transcode 320 mp3 kbps to a more efficient lossy format? [duplicate]

Several thousand 320kbps mp3s of studio and live high fidelity recordings of concerts will be landing on my computer soon. (not pirated, I promise you!) I'm happy to have and use them for personal ...
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Clipped sound although waveform never flattens out

I was listening to a song and noticed the drums sounding very compressed/clipped, but when I actually took a look at the waveform, this is how it looks: Now I'm wondering whether there is some kind ...
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374 views

Mid/side multiband compression

I am trying to master a track which is EDM(house) based and I am using izotope ozone 6. For instance, if there are (Low-end, Low-mid, High-mid, High-end) 4 bands, Which one would be the most ...
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Can compressed music files be adequately recovered by remastering?

I have some rare old music files on my drive that are compressed to 128 kbps in the mp3 format. Some of them are of digital origin, and some of them are vinyl rips. Audio data compression affects ...
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How can I fix robotic distortion from an audio track?

First of all I apologize if the title doesn't make any sense. I lack the vocabulary to describe the issue that I have with an audio track I'm trying to fix or at least make a little better. This is ...
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is there a common low-end level for a song?

I am currently mastering a song in iZotope Ozone 6. Both in Ozone's EQ and Multi-band Compressor, if I boost up the low frequency it sounds muddy, but it sounds soft if I bypass it. Is there any "...
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Does converting mp3 to wav make sense with regard to timing accuracy?

Think about a program where it is mission critical to sync audio playback with text being displayed on the screen. And timing of this sync must be perfect. Currently, I am having all sorts of trouble ...
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5 votes
1 answer
3k views

Which audio file format gives smallest size for silent tracks?

I want to make a bunch of silent audio files (of different lengths: A few seconds up to some minutes), just to but them into playlists and so on in order to have silent times in between. I am ...
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Notification sound that sounds decent over a low quality connection?

I'm a programmer without any real audio engineering experience playing around with procedural audio generation. I need to create a notification sound that sounds decent/not-horrible over a potentially ...
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3 votes
2 answers
729 views

How is compression quality related to sample rate?

The higher the sample rate is, the better the compression quality will be. That seems to be the conclusion to draw from several dynamics plugins I've worked with that implement oversampling (in this ...
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1 answer
892 views

"Compress" an AIFF file?

I'm wondering how I can compress several AIFF files to reduce their size at this point I don't care about sound quality, I just need to reduce the file size the problem is that AIFF is an ...
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2 votes
2 answers
1k views

Will stereo compression affect stereo image?

What happens with the stereo image when compressing stereo program material using a linked dual compressor with a combined internal sidechain (a "stereo compressor")? Is the stereo image reduced, ...
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2 votes
2 answers
349 views

Audio Leveler Isn't Stable

Sorry if this question doesn't make sense (or uses the wrong terms, feel free to edit). I've got very little understanding of audio, but willing to learn. I've recorded a tutorial for Youtube and I'm ...
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3 answers
1k views

Applying compression to a sound several times

I would like to know what happens, objectively speaking, when you apply compression to a sound 2, 3, or 4 times. I would beleive its useless to do this. Or counterproductive. I generally use a ...
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