Questions tagged [mp3]

MP3 is a popular digital audio coding format. It uses lossy compression to decrease file size, which makes it useful for bandwidth-limited operations such as streaming and file sharing. MP3 has the file extension ".mp3", which originally stood for "MPEG-1 Audio Layer III" or "MPEG-2 Audio Layer III".

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225 views

How to find difference between 2 versions of the same song (one longer than the other)?

I have two versions of the same song. One is longer than the other (9 minutes Vs 13.55 minutes). Since our program only allows 10 min max time, we have to use the shorter version. but the audio ...
2 votes
2 answers
709 views

Extend periods of silence in mp3 files

I have a bunch of mp3 files containing lots (about 300 per file) of small (0.5s to 3s long) snippets of audio separated by 1s of silence. I want to edit these mp3 files (preferably losslessly) so ...
1 vote
7 answers
5k views

Does converting an mp3 format audio file to m4a format makes audio quality better?

Does converting an mp3 format audio file to m4a format makes audio quality better ? I was just wondering if mp3 is lossy. How it can generate lossless m4a file after conversion. I know mp3 can be ...
0 votes
4 answers
2k views

Subliminal messages in MP3

I have purchased a set of MP3 files (with classical and binaural music) that claims to have embedded in them messages at a frequency that people cannot hear -- i.e., subliminal messages (these are for ...
1 vote
1 answer
141 views

How to interpret this PCM data?

I am attempting to write a program to get the ATmega328P to play audio. I first tried to use this library , but I could not get it to work, so I am now attempting to program my own. The problem is ...
0 votes
1 answer
63 views

Is there any easy and simple way to reduce the size of MP3 files?

I create mobile apps, and use lots of MP3 files in my mobile apps. But, I am not an audio engineer. Would anyone please tell me if there's any easy and simple way to reduce the size of MP3 files ? (In ...
11 votes
4 answers
2k views

Is there a losslessly compressed audio file?

Anyone who works with audio either as a hobby or as a professional knows about MP3 and WAV, and the advantages and disadvantages of each. Namely: MP3 (most commonly MPEG III) disadvantage: lossy ...
1 vote
1 answer
174 views

Why converting MP3 from 192k to 64k causes samples to protrude

It doesn't matter which software is used to convert, FFMPEG or CoolEdit 2000, it makes always the same effect. The original file is WEBM. When I convert it to WAV PCM or MP3 192k using one of ...
-1 votes
3 answers
198 views

Why do MP3 files have a sample rate? (When they are just composed of sine waves)

I apologise if the title wasn't clear, but essentially, I am a little bit confused about MP3 files. I was under the assumption (in MP3s) that a Fourier transform is used to split up the sound wave ...
2 votes
2 answers
471 views

Is it possible to cut an mp3 file without re-encoding it?

I have some mp3 files that need to be cut in segments (one mp3 file for the start, one separate mp3 file for the middle, and another mp3 file for the end). It can be easily done in any DAW, but DAWs ...
48 votes
15 answers
67k views

Are there any audible differences between 192 and 320 kbit/s .mp3 files?

I have friends that are very picky when it comes to mp3 bit-rate, and will always look for the 320 kbit/s version of a file. However, I have never noticed any differences, they sound the same to me. I ...
4 votes
1 answer
619 views

What is this static in front of the audio in MP3?

I understand that MP3 is not recommended for production as it is lossy, but that is irrelevant here. I understand that the MP3 encoding algorithm inserts silence in the first second to pad out the ...
8 votes
3 answers
30k views

Opus vs MP3 (Size & Quality Comparison)

How does Opus differ from MP3 when comparing both in relation to the file size and quality. For example if I were to convert a 320kbps or 128kbps file that is 10MB or 4MB in mp3 format to opus, what ...
0 votes
1 answer
193 views

mp3 spectral analysis blue above 16 khz

the 128 aac file was a youtube rip.... trying to determine if the 224 vbr is better...I am assuming yes because of the blue above the 16 khz or could those just be artifacts?
0 votes
2 answers
372 views

What are the distorted sounds in 2 - 5 kHz range?

I have an mp3 128 Kbps music file with particular parts where a series of single note only on a cello is played initiated with a bell click. Less than a second after a bell click and cello note ...
1 vote
1 answer
617 views

Possible to ffmpeg encode an MP3 media segment for HLS to follow existing MP3?

My use case is essentially DIY internet radio. I've abstracted the real-world constraints into a toy problem for simplicity, but these constraints are real for me. I'm shipping a 24/7 live HLS stream ...
0 votes
1 answer
61 views

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 ...
0 votes
1 answer
425 views

What defines loudness of mp3 in a file?

Still trying to understand why loudness data is so difficult to find... Say there are mp3 files and a smartphone. Smartphone has amplification buttons, but at same level different files` sound is much ...
5 votes
5 answers
6k views

How to ensure uniform sound levels in multiple WAV files?

I require that the sound levels of all the songs for my project are uniform. The songs are from different albums and different artists, hence they are not uniform from the perspective of volume level. ...
2 votes
3 answers
3k views

What could be causing distortion on my MP3 when imported into Audacity?

I appreciate that this is an open ended question; I'm really looking for some pointers on what to look at next. I recorded 48 minute conversation into an MP3 at 128kbps. It's a stereo recording with ...
0 votes
1 answer
765 views

Song exported from FL Studio plays from one side of headphone

I’m working on a song in FL Studio, and I’m encountering a rather puzzling problem. The song plays fine on my laptop, in FL and as an MP3, and comes out of both sides of my headphones. For some reason ...
8 votes
9 answers
14k views

Does the .wav file created from a .mp3 file have better quality than the .mp3 file itself?

A .wav file created from a .mp3 file has the same frequency domain plot as the mp3 file itself. However, the .wav file created from .mp3 file has larger file size. According the post https://...
0 votes
0 answers
25 views

Incorrect Album and Attribution in Windows Media Player

After exporting an audio mixdown from DAW to (WMA or MP3) and editing applicable tags with appropriate software, Media Player in Windows 10 often still gets album, artist and other attribution ...
1 vote
1 answer
222 views

Is it possible for Matlab to read and decode an mp3 file?

I have run the following Matlab code and I got a signal as shown in the Figure below. [y, fs] = audioread(mp3file); y1 = y(:,1); y2 = y(:,2); dt = 1/fs; t1 = 0:dt:(length(y1)*dt)-dt; t2 = 0:dt:(...
0 votes
1 answer
1k views

What should be the bit-rate & sample-rate settings, if I were to convert a WebM audio file to MP3?

I want to convert a WebM audio file to an mp3 file using FFmpeg. I was wondering what should be the ideal bit-rate & sample rate settings for the following input. Input #0, matroska,webm, from 'v....
1 vote
3 answers
9k views

How to add meta info to mp3/wav file MAC OSX?

How to add meta info to mp3/wav file MAC OSX ? Is there any application?
4 votes
3 answers
4k views

Audacity: Increase audio volume in audacity software

How can I increase audio volume of a mp3 file in audacity? I need to cut a part of mp3 song to make a ringtone. But as I save it in by mobile, the volume is too low for this particular file. Is there ...
2 votes
1 answer
108 views

What causes the spike in PCM signal?

I decode an mp3 song using two different methods. The output PCM signals are shown in Figure 1 and Figure 2 respectively. Both the decoded output files have the same file size and audio quality. ...
7 votes
3 answers
21k views

How to convert a stereo MP3 to mono MP3

We had an MP3 created for a message greeting on our phone system. It is stereo MP3, not sure what the bit rate is, but is sampled at 44.1k. Our sound system requires it to be in this format: 16 bit ...
-2 votes
1 answer
351 views

What software is best at ripping multi-CD audiobooks? [closed]

I want to take a 6 CD audiobook and rip it into MP3s that I can listen to on my phone. Maybe this works ok if the audiobook has already been entered into some CDDB. But my CDs aren't recognized. ...
9 votes
6 answers
88k views

Is it possible to separate voices from one mp3 file?

I want to separate 2 or more voices from one audio file, is there any software to this ? I have done some googling and seen that the answer is NO in most cases. But I think at least there should be ...
-1 votes
1 answer
27 views

Encoding with explicitly defined 'high quality' regions within variable bit rate lossy audio

I am personally happy with absolutely trash audio quality when listening to podcasts, and frequently skip music, but have noticed many podcast producers will use high CBR* or overly high quality VBR ...
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 ...
0 votes
0 answers
917 views

Wich of these... are the best configuration, in Lame v3.100, CMD´s command line?

I tried and compared all of these preset´s configurations. The idea is to get and rich out the BEST QUALITY of SOUND POSIBLE, Don´t care the file size. With the best Bass or Low Frecuencies, and not ...
4 votes
2 answers
10k views

LAME: Why is a lowpass filter used with --preset insane

After analysing various converted mp3's I've found out that the LAME encoder uses a lowpass filter for the insane preset (CBR 320), but the filter seems to be disabled for the extreme preset (VBR V0). ...
-1 votes
1 answer
50 views

Do Opus And AAC Use Artistic License To Improve Sound Quality By Sacrificing Accuracy?

I was reading a forum thread the other day and came across a post which claims that unlike MP3, other codecs such as Opus and AAC "[invent] audio data that's not accurate to the source" by "[...
0 votes
1 answer
296 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 ...
1 vote
3 answers
1k views

How can I convert large audio file .aiff to mp3?

When I use GarageBand to record some audio, the audio files are too large (e.g.:1.86GB file size) and GarageBand won't export over 90 minutes long audio. Audacity cannot directly export to .mp3 file. ...
3 votes
3 answers
4k views

Is source bit depth/sampling rate relevant for mp3 conversion?

Will an MP3 file, encoded from a 16-bit, 44.1 kHz source sound better or worse than an MP3 file, encoded with identical settings, but from a 24-bit, 96 kHz source? Or will there be no audible ...
0 votes
1 answer
401 views

What is the difference between Audacity's dB and MP3Gain's dB?

I've read that Audacity can also do MP3Gain's job to normalize multiple tracks, but while in MP3Gain the target volume is something like 89.0 dB or 95.0 dB in Audacity the maximum is 0 and it goes ...
2 votes
3 answers
863 views

Join audio files into one mp3?

I have a bunch of mp3 files I would like to consolidate into a single mp3. What software is able to do this quick and effectively? I have tried online conversion tools and they don't work so well. I ...
3 votes
3 answers
58 views

Easiest way to convert audio tape to mp3?

I have a few hundred of audiotapes; I am looking for an easiest way to convert them to mp3; I would like to find a software which would 1) adjust recording level automatically (and do it gradually - ...
0 votes
1 answer
241 views

How to merge ~700 very short, sequentially numbered, audio files into a single track? [duplicate]

I recently received hundreds of audio files from a government agency. They are numbered sequentially in the order they were recorded and each file is anywhere between 1 - 12 seconds in length. I am ...
0 votes
1 answer
64 views

Why do YouTube Converters use MP3? [closed]

So youtube-dl shows that YouTube only uses Opus, m4a and vorbis containers. So how do these YouTube to MP3 converters get the MP3 then? Do they transcode from a lossy format? Isn't it better to get ...
2 votes
4 answers
5k views

Why do mp3 files have a time delay when compared to wav files?

At first I thought this was a tempo issue when exporting my stems from fl studio to cubase. But when I zoomed in close enough and lined up the tracks they were perfect (ie. no stretching). The mp3 ...
3 votes
1 answer
1k views

How does MP3 and FLAC's encoding work

I am working on a research project and struggling on finding information on some of the more technical details about the working how MP3 and FLAC works to encode and compress its data. Most ...
1 vote
1 answer
209 views

WAV file not in sync with source MP3 file

I am using NAudio and Adobe Media Encoder (separately) to convert a 2-hour MP3 file into a WAV file: The resulting WAV file is not in sync with the source MP3 file: MP3 second #996 = WAV second #...
0 votes
3 answers
2k views

Re-encoding MP3 reduces quality

If we have an MP3 file and we decode it to an uncompressed WAV file and then later encode it to MP3 again at the same sample rate - why is it that the quality gets degraded? This is a past exam ...
1 vote
4 answers
140 views

alternative to mp3

Often I have to import/export audio files to/from Audacity/Adobe-Premiere and back-and-forth. I know that mp3 is lossy format, but when I try to choose another alternative .wav, then it takes up to ...
1 vote
3 answers
671 views

Which format for radio station to choose in Shoutcast?

In Shoutcast there is option to choose will radio station run mp3 or aac, and i am not sure which one is better option. Please recommend. What i read is that aac can provide same quality on lower kbps,...