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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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Higher-than-standard EBU R128 integrated loudness target?

Task at hand I'm mostly a layman as it relates to sound design, but I have a library of workout songs that I'm "normalizing" such that some songs aren't louder than others. For that I'm ...
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Indistinguishability from a low-quality source

Is there any way to estimate what bitrate would be required for a codec like vorbis or mp3 to achieve near transparency to a 10-bit, 32,768 Hz PCM source? Are there any heuristics that can be used to ...
forest's user avatar
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Are "fake rimshots" really viable, and how can they be done?

I've heard a couple anecdotes of a drummer in a studio who wanted a rimshot sound from the snare and was told to not play rimshots- so that the engineer could use compression later to make the normal ...
Edward's user avatar
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Low microphone volume, even with phantom power enabled in my audio interface software

I'm experiencing an issue with my microphone and audio interface setup, where the microphone volume is too low, and I need to turn the input gain in my audio interface’s mixer software to the maximum ...
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How can I monitor and send a wet signal from my DAW to my conferencing software?

I purchased a Shure SM57 to use for conference calls. It is connected to an audio interface (RME Babyface original). I want to apply dynamic effects to it but the software that comes with the RME ...
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Why does compression acheive a louder volume without feedback?

Why can you reach a much higher volume for a vocalist (without feedback) if compression is applied? This has been my experience so far, and I'd like to understand why this is. When you add an input to ...
Lonnie Best's user avatar
2 votes
1 answer
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How can I automate finding bass distortion in improperly processed files?

I have around 1000 "songs" - an 80s experimental noise duo - ripped to flac from cassette. A bunch (150, maybe?, but I don't know which ones) were processed with a hard limiting script ...
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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 ...
sqek's user avatar
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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 ...
aaa's user avatar
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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 ...
Logarithmus's user avatar
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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:
Mateusz 's user avatar
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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!
tmighty's user avatar
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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 ...
emonigma's user avatar
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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 ...
emonigma's user avatar
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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: ...
foobar0100's user avatar
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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 ...
Vlastimil Burián's user avatar
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1 answer
120 views

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.
Saptak Bhattacharya's user avatar
1 vote
1 answer
2k views

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 ...
Ivan's user avatar
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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 ...
Joel Graff's user avatar
1 vote
1 answer
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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 ...
ozahorulia's user avatar
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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 ...
gsamerica's user avatar
3 votes
1 answer
890 views

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 ...
Francesco Cariaggi's user avatar
1 vote
1 answer
515 views

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,...
kelvinilla's user avatar
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308 views

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 ...
YourMJK's user avatar
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3 answers
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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?
bdb112's user avatar
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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 ...
tjcinnamon's user avatar
1 vote
1 answer
431 views

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 ...
Big D's user avatar
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14 votes
2 answers
18k views

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 ...
Iter Ator's user avatar
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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 ...
Dance100.com's user avatar
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3 answers
1k views

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 ...
zakalaka's user avatar
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1 answer
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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....
Louis Cowell's user avatar
10 votes
3 answers
21k views

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 ...
Suuuehgi's user avatar
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5 votes
1 answer
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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? ...
ReeFagbemi's user avatar
2 votes
1 answer
129 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 ...
Schizomorph's user avatar
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2 votes
2 answers
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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 ...
Undistraction's user avatar
1 vote
1 answer
407 views

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 ...
Bruno Augusto's user avatar
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1 answer
80 views

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 ...
Calebmer's user avatar
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1 answer
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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,...
Ah Kei's user avatar
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-1 votes
1 answer
434 views

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 ...
Poppy's user avatar
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0 votes
2 answers
147 views

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 ...
Dan's user avatar
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4 answers
85 views

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 ...
Dan's user avatar
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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 ...
idiotprogrammer's user avatar
0 votes
4 answers
119 views

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 ...
DeinFreund's user avatar
1 vote
2 answers
395 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 ...
Ronald's user avatar
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4 votes
3 answers
2k views

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 ...
P A N's user avatar
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2 votes
1 answer
2k views

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 ...
victmo's user avatar
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3 votes
1 answer
166 views

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 "...
Ronald's user avatar
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5 votes
1 answer
1k views

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 ...
Brian FitzGerald's user avatar
6 votes
1 answer
4k 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 ...
Golar Ramblar's user avatar