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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32 views

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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38 views

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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36 views

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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54 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.
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249 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 ...
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2answers
124 views

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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1answer
52 views

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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26 views

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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1answer
167 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 ...
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1answer
131 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,...
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92 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 ...
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72 views

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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68 views

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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229 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 ...
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1k 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 ...
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1answer
3k views

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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2answers
419 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 ...
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56 views

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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9k 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 ...
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1answer
466 views

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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1answer
121 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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2answers
66 views

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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1answer
155 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 ...
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51 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 ...
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1answer
58 views

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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310 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 ...
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2answers
122 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 ...
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4answers
78 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 ...
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1answer
428 views

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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4answers
93 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 ...
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2answers
299 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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3answers
905 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 ...
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1answer
657 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 ...
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1answer
153 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 "...
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1answer
855 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 ...
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1answer
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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2answers
111 views

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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2answers
470 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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1answer
705 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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2answers
787 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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2answers
264 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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3answers
864 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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1answer
80 views

How to master a song? [closed]

What should I do when I have finished mixing a song and I want to master it? I don't have any processors on Master strip. I know that multiband compressors and limiters are usually used. I would like ...
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1answer
929 views

Audio codec with fastest decoding

I have an application that requires reading long (8h) compressed audio files. The quality and size of the file is not the main concern, but the time it takes to decode the full file is. WAV file does ...
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1answer
146 views

Critical listening examples for compressors and digital filters?

I'm looking for listening examples for the following applications: -Compressors usage (what to listen for when changing parameters such as ratio, attack, release time, etc). I've found some material ...
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2answers
750 views

How to use multiband compressor in Mixing and Mastering?

I try to use Ozone-5 Multiband Compressor, but it looks very confused to me. I really want to know what is the purpose of doing Mutiband compression and How do you usually use it.
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2answers
478 views

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

I want to add and crossfade multiple mp3s into a long mix. Is there software that can mix many mp3's without re-encoding? If i use a normal mixing program and decode-re-incode, how much worse is the ...
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1answer
88 views

Compress more than once? (VO multi-mix)

I'm a bit new to all of this, so I just wanted to get some advice from some pros. I'm doing VOs for different segments that are all going to be strung together into one final track. In stage 1 of ...
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549 views

Why is loudness war and mp3 bad?

So there are a lot of critics of overcompressed sound and mp3s. They say that the music industry is feeding us overcompressed music to make it sound good on low end devices. Now I'm confused, if music ...
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59 views

Calculating compression output with a knee

With a hard knee you'd have an output as output=Threshold+(Input-Threshold)/Ratio Now, I found this pdf http://redmine.jamoma.org/attachments/download/175/JAES_V60_6_PG399.pdf which lists as a ...