Kdenlive can synchronize videos using a audio reference. Select the track you want to use as the audio reference, press the right mouse button, and select Set Audio Reference. Then select the track you want to aligned to the reference, press the right mouse button and select Align Audio to Reference.
I suggest Audacity. You can load wave or mp3 files (among other formats). Select the track and then go to the menu Effect->Truncate Silence... Here you can specify a decibel threshold and also a duration. Also you can specify how much to truncate it to. I found 0.1 seconds sounds better than 0 seconds
Here's a youtube video on it although it's for an ...
A nice, free, lightweight audio editor that is not audacity is Wavosaur. It allows you to cut, move, and edit the volume of audio files. Cutting is simply done using standard cut/copy/paste commands, and volume is done via the process menu.
Best of all, the largest version is only just over a megabyte!
You can use FFmpeg:
Free and open-source
Runs on Windows, OS X, Linux, Android
Is CLI so you can batch
Can overlay two audio files, e.g. ffmpeg -i input1.mp3 -i input2.mp3 -filter_complex amerge -c:a libmp3lame -q:a 4 output.mp3
If you really would like to save some effort, install python, use pip install pydub to add pydub and then use os.walk something like:
from pydub import AudioSegment
OUTNAME = "Mixed.wav"
def makemix(audiofiles, dirname):
""" Mix a list of audio files to Mixed.wav """
mix = AudioSegment.from_file(os.path.join(dirname, audofiles)
QuickTime player can do what you want.
File > New Recording
Once you're happy with it (eg re-record or trim it) save it then do
Edit > Add Clip to End and select the existing recording to be added.
Save/export as required
Further info: https://support.apple.com/en-us/HT201066
Audacity is a very powerful application, open source, free, for Windows. I have used it to alter many hours of bad audio. It includes a wide range of effects. You really can fix just about anything with it.
One of the less often mentioned facilities in the Blender 3D Modelling, Animation and Rendering toolkit is the Video Editor which also has an Audio Track Editor.
While it is not as powerful a sound editor as Audacity it does allow you to do the mixing, volume control on each track, adding sounds from .WAV or .MP3 files as well as from Movies, have volume ...
The simplest way is just to use the Unix cat command like
cat podcast1.mp3 podcast2.mp3 podcast3.mp3 > megacast.mp3
MP3 files are just audio and any headers or MP3 tags in the other files will just be a microsecond of static if you can hear it at all.
You could also record 2s of silence with Sound Recorder into silence.mp3 and use
cat podcast1.mp3 ...
You didn't provide your OS and price requirements. If you want paid solution and OS is Windows here are two alternatives for Audacity.
Option 1: Adobe Audition
Edit, mix, record, and restore audio.
Audition CC is a comprehensive toolset that includes multitrack,
waveform, and spectral display for creating, mixing, editing, and
restoring audio ...
There are a number of FFMPEG GUI front ends but when combining clips you will find that it is necessary to re-encode if any of the following are true:
The last frame of one clip is not exactly one frame before a keyframe
Any of the parameters used for encoding differ between the clips
I would suggest taking a look at iffmpeg - there is a free trial and the ...
I would suggest using FFMPEG + a GUI such as Avanti. FFMPEG allows all sorts of operations on the majority of video & audio files including trimming without recoding from the command line and Avanti provides a GUI that boasts access to all of the FFMPEG features.
To trim an Audio file from the command line without re-encoding and skipping the first ...
You can use mp3DirectCut which is a lossless editor for MP3 (and to a degree, MP2 and AAC) audio files, able to provide cuts and crops, copy and paste, gain and fades to audio files without having to decode or re-encode the audio.
I've used it in the past to cut a lot of mp3 files in "batch mode", but you can do precise cuts, etc. I hope it's just what you ...
Free, Gratis & Open Source
Quite easy to use
Available for multiple platforms
Can do cleaver tricks like removing repetitive background noise or increasing tempo without changing pitch.
Strongly recommend giving it a try before you look at anything else.
You can script Audacity from an external python script (with the output file being separate from the input file so as to provide non-destructive editing) with the scripts being plain text, python, files.
There is a huge selection of Audio processing and production software in the Python work some of which may provide what you need. A curated list can be ...
I managed to split the audio using ffmpeg for Windows https://ffmpeg.zeranoe.com/builds/
Unzipped the program to a desired location.
Opened cmd in Windows.
Navigated to to the ffmpeg-(version-code-here)/bin/ folder
Ran the command
ffmpeg.exe -ss 30 -i "D:\Songs\my-audio.m4a" -c copy -t 60 "D:\Songs\my-audio-splitted.m4a"
This command is splitting the ...
Rather than a single program that does this for you I have a combination that can do it for you. The combination is:
Python - Programming Language Download and install from https://www.python.org/downloads/ selecting Python 3.6 or later and selecting "Add to Path" during the install.
Numpy - Numeric Library Once you have installed Python you can install ...
This is what I've found myself:
It's more focused on Video; the GUI is very limited (e.g. can't enter the cut range as timecodes, typing in the digits); and you don't see the wave form or the block/frame boundaries. Still, it sort of does the job.
You can easily do this in Audacity following the guide How To Quickly Edit Multiple Files in Audacity.
You can chain effects to be applied to multiple files. The effect you are probably looking for is ChangeSpeed. You can then select multiple files and you're good to go.
Link to Audacity if you don't have it yet.
Total Recorder Pro may meet your requirements, although it appears for Windows machines only. Here's one segment of the description to meet your requirement for markers:
Use Cue-sheet files. Total Recorder lets you create cue-points, which can be used for splitting a file afterwards. These cue-points can be created manually, for example to make a bookmark ...
The basic problem is finding the actual tracks in the audio stream. You could search the audio for things that qualify as music but you will capture advert jingles, station tags, etc. and miss any vocal only tracks.
So you really need some metadata to tell you when the music is playing - luckily some stations provide this from their ...
The sox man page gives an example script for extracting each channel from a file into its own file. Basically it ends up doing (in reverse order)
sox all_tracks.wav all_tracks-01.wav remix 01
sox all_tracks.wav all_tracks-02.wav remix 02
sox all_tracks.wav all_tracks-03.wav remix 03
Here's the script from the man page. Pass it the name of the input ...
FFMPEG can split, merge (down mix) and concatenate audio, (and video), tracks including multi-track audio files from the command line or a batch/script file.
It can also convert between the majority of formats.
Free, gratis & open source
Able to handle large files
There are some very good audio channel manipulation ...
Update: As of 06/13, I can confirm that the Tuneskit Audible Converter is able to decrypt Audible audiobooks without using the analog loophole. I set it up on a system without the components necessary to play audio, and the process worked perfectly. It is very quick, and seems to preserve all quality without increasing the file size. Once the files are ...
Frankly the question as asked cannot be done as changing the bit rate must always require re-encoding and reducing the bit rate will almost always reduce the quality of the track - the exceptions will be when the track had already been processed to increase the bit rate above that which was originally recorded but not always in this case or for simple ...
Although I have never tried any of these but maybe worth a check:
Voxal Voice Changer
Morph voice in real time(Includes robot, girl, boy, alien, ethereal, echo and many more)
Works on Windows and MAC OS X
Powerful, real-time voice changing software
Modify, change and disguise your voice in any application or game that
uses a microphone to ...