Fast MPEG audio editing


mp3DirectCut - Fast MP3 and AAC cutter and MP3 recorder

All you need to cut your MP3

mp3DirectCut is a fast and extensive audio editor for encoded MP3 and AAC. Without re-encoding directly cut, crop, split and join your tracks, create fades on MP3 and much more. Direct lossless editing saves encoding time and preserves the audio quality of encoded tracks. The built in recorder creates MP3 on the fly. With Cue sheets, Pause detection or Auto cue you can easily divide long files.


Direct data copying, no re-encoding

Non-destructive cut, copy, paste

Level change, fade, normalize MP3

MP3 recording/encoding with ACM or Lame

Fast MPEG visualisation and easy navigation

AAC support · MP2 support

Batch processing · Cue Sheet support

Pause detection · Auto cue by time values

Track splitting with filename and tag creation

Trim · Crop · Fast play · Loop play

ID3v1.1 tag editor, ID3v2 tag keeping

VU meter · bitrate visualisation

Level activated recording

Command line usage

Download mp3DirectCut

Version 2.32 · 2020-12-14 · 304 KB · Simple installer (sfx zip) · Freeware
MD5 checksum: d907ee8d75a404b87e585bc192aff71c


2.32Tooltip glitch fixed · Timeline overflow fixed · Audio display glitches fixed
2.31Overdrive check removed (inacurate detection possible) · Minor corrections
2.30Cue sheet load problem fixed · Longer delay time for tooltips · Check for overdrive function (Normalize) · Fixed garbage bytes on VBR header creation · Some corrections
2.29Level activated recording feature · Graph level range increased · Some more improvements
2.28Possible startup crash fixed · Some minor improvements and corrections
2.27Language files in UTF-8 · Layout for smaller window width · Lots of minor improvements
2.26UTF-8 character encoding for cue, project and ini files · Internal ANSI / Win98 compatibility removed · Checking 4GB size limit · Cut noise mute function · Settings button in the toolbar · Graph font localization issues fixed · Some other corrections and improvements
2.25Append by file dropping · Multiple file dropping · Re-encoded save mode · Limit track time option for Batch · Gain change detection on cutting · Volume slider in text button layouts
2.24Split bug fixed · Split and Batch dialogs improved · Cue flag functions
2.23MP4 demuxing by ffmpeg · VBR header bug fixed · Total track time for big timer


Windows or Linux with Wine

For MP3 play/cut: MP3 ACM codec (present in Windows) or mpglib.dll

For AAC play/cut: libfaad2.dll (32 bit)

For MP3 recording: encoding ACM or Lame encoder DLL (32 bit)

For MP4 demuxing: ffmpeg.exe

FAQ - Frequently asked questions

mp3DirectCut allows quick and easy editing of MP3 and AAC files. Find the part you want to remove. Mark a selection with one of these ways: 1. Add it with a left button click into the graph position and adjust the edges with the right mouse button. 2. Use the buttons "Set begin" and "Set end" (or the keys B and N). They set the beginning and the end of the selection to the current play position (yellow line). Adjusting also works over a long distance after seeking a new position. To prelisten the cut press the "Prelisten AS CUT button" (or F9). To fine adjust the selection you can also use the keys 1-4. To cut press the Cut/Cue button in the lower panel (or the Del key). Use normal play to control the result.

The easiest way is to use the function "Simple fade" or "Two-stage fade". Point to the position where a fade should end (fade in) or start (fade out). In the Edit menu choose a fade option. Adjust the fade by dragging the grey handle(s): Use the left button (up/down) for the level and the right button (left/right) for the position. With fade curves you can create more complex fades. Each cue can be used for fading. A cue is created by pressing Cut on a zero-length selection (dotted line). Gain adjustment is only possible for MP3, not for AAC and MP2.

There are several methods: 1. Drag a bunch of files to the program. Usually the file under the pointer will be used first, this is file browser dependent. 2. Drag single files to the audio graph of the program, they will be appended. 3. Use the virtual Cut, Copy and Paste options with a second program instance. "Save all audio..." will create the combined track. Important: the audio parameters (format type, samplerate, stereo mode, CRC) must match. Also the Batch feature supports joining of tracks.

To play AAC files (which also are the audio tracks of MP4 in most cases) mp3DirectCut needs the free "libfaad2.dll". The file must be placed in the mp3DirectCut folder. Recommended for downloading this DLL is the RareWares page (see links on the "More" page). MP4 audios can be edited directly if the command line program "ffmpeg.exe" is present and mp3DirectCut knows the location (select in the settings). On opening an MP4 mp3DirectCut runs FFmpeg in the background to demultiplex an AAC audio track. Then it automatically opens the AAC for editing. It will be saved only as AAC without muxing back to MP4. But this should be no problem since every player supporting MP4 should also play AAC.

The installer is a selfextracting ZIP file. It simply copies the files to the selected folder and creates a desktop icon. To copy the files to the default "Program files" folder, it is usually needed to run the Installer "As administrator" (right button). No admin rights are needed if you install the program to a folder where you have write access. The files of the distribution can also be extracted with an archive utility (e.g. 7-Zip). A Start menu entry must be created manually. File type associations to the program can be created within the system's file manager. If your system complains about malware and you downloaded the original distribution file, this should be false positive by heuristics. You could try to update the signatures of your security software. To make sure that you have the original distribution file, check the MD5 sum below the download links. You can also check the executable or the distribution file on VirusTotal.

As it shows fast MP3/AAC data instead of PCM, the main MP3 graph does not show the real audio level. It usually contains only higher frequencies. It can also be too high or too low over the whole file. In these cases the shown height can be adjusted in the Options menu (or Numpad +/-). In rare cases the display shows nothing. Silences may appear with a high level in some cases. The reason for this limitations is that no decoding is done for the display. This makes mp3DirectCut so fast. The correct audio level is always shown while play with the VU meter on the right.

Copyright © 2000-2021 Martin Pesch