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cutandjoin

cutandjoin on Hacker News

Re: on Sunday June 28, 2026 @05:13AM (#48705683)
Cjam is a frame-based MP3 editor that works without decoding or re-encoding.

It supports batch editing of multiple files using both the GUI and scripting.

Editing is performed virtually by referencing the original MP3 data, making operations very fast.

The latest release adds clipboard-based integration with mp3DirectCut and REAPER. These integrations also work without creating temporary files.

Show HN: YouTube Audio Library Previews [video]

Posted by cutandjoin on Monday February 02, 2026 @07:43PM
from the show-hn dept.

https://www.youtube.com/watch?v=eoa9pwIr64g

The YouTube Audio Library currently hosts around 2,700 free music tracks that creators can download and use in their videos.While full versions of each track are automatically published on YouTube, browsing them one by one is not very convenient if you just want to preview and compare music.So I made a series of category-based preview videos with short medleys and links to each full track,...

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Re:Show HN: MP3 File Editor / Player for Windows on Tuesday December 16, 2025 @09:34AM (#46288999)
GitHub makes binary distribution much easier for me. For example, Cjam is listed on several freeware sites and GitHub helps streamline update notifications and integration with them.
Re:Show HN: MP3 File Editor / Player for Windows on Tuesday December 16, 2025 @09:33AM (#46288984)
thanks
Re:Show HN: I made an MP3 editor for Windows on Saturday November 08, 2025 @05:49PM (#45860753)
Official site: https://cjmapp.net

Cjam is scriptable, here’s an example:

https://forum.cjmapp.net/viewtopic.php?t=31

Re:Show HN: Cjam – a modern MP3 file editor on Saturday October 11, 2025 @12:40PM (#45550528)
Cjam includes features that don’t exist in other tools, and it’s freeware.
Re:Show HN: Cjam – a modern MP3 file editor on Saturday October 11, 2025 @12:39PM (#45550516)
It’s a strong advantage for individual developers like me to distribute binaries on a trusted platform without any hosting cost.
Re:Show HN: Cjam – a modern MP3 file editor on Saturday October 11, 2025 @06:14AM (#45547959)
Actually, I posted before using the main site link, and HN doesn’t allow posting the same URL twice, so I used the GitHub link this time.

https://news.ycombinator.com/item?id=43883180

And yes, Cjam is quite similar to mp3DirectCut. It’s like managing several mdc instances together in one list.

Re:Show HN: Cjam – a modern MP3 file editor on Saturday October 11, 2025 @06:12AM (#45547953)
I use MP3 a lot myself, so I built this tool around it.

Cjam is designed in a way that makes it easy to adapt to other small, lossy formats as well, so it has potential to go beyond MP3 in the future.

Re:Show HN: Cjam – a modern MP3 file editor on Saturday October 11, 2025 @06:09AM (#45547931)
I rethought MP3 editing without decoding/re-encoding for today’s hardware.

Existing tools tend to focus on one action at a time, like splitting or joining files. But Cjam lets you define multiple actions across multiple files at once using scripts. So it makes it easier to create and share more complex editing workflows.

You can find some example scripts on the forum: https://forum.cjmapp.net/viewforum.php?f=9

Show HN: Cjam – a modern MP3 file editor

Posted by cutandjoin on Tuesday October 07, 2025 @07:56AM
from the show-hn dept.

https://github.com/cutandjoin/Cjam/releases/tag/v2230

Cjam is an MP3 editing and playback tool for Windows.The MP3 format itself has been stable for decades, but advances in CPU power and memory have shifted the relationship between files and hardware, creating room for new approaches to working with MP3s.Cjam provides both a GUI and scripting interface that allow you to process large numbers of files at the frame level. This improves on existing...

( Read More... | 13 comments | on HN )

Show HN: MP3 File Editor for Lossless Bulk Processing

Posted by cutandjoin on Tuesday September 09, 2025 @10:01AM
from the show-hn dept.

https://github.com/cutandjoin/Cjam/releases/tag/v2210

Cjam is lightweight freeware that can process large numbers of MP3 files without quality loss.Official site: https://cjmapp.netAlso available on MajorGeeks:https://www.majorgeeks.com/files/details/cjam.htmlThere’s also a forum where users can share feedback or scripts:https://forum.cjmapp.net

( Read More... | no comments | 2 points | on HN )
Re:Show HN: MP3 File Editor for Bulk Processing on Sunday May 04, 2025 @07:53PM (#43890643)
Software that my parents or yours can use is definitely a good thing. Not everyone needs to chase the cutting edge.
Re:Show HN: MP3 File Editor for Bulk Processing on Sunday May 04, 2025 @06:52PM (#43890299)
Thanks for pointing it out. I've updated the license file accordingly.
Re:Show HN: MP3 File Editor for Bulk Processing on Sunday May 04, 2025 @01:49PM (#43888196)
Thanks for all the comments. This is a tool for editing MP3 files at the frame level. It’s similar to mp3DirectCut and mp3splt in some ways, but today’s hardware enables more advanced editing of lossy audio. Any feedback is appreciated.

Show HN: I designed a DSL for playing multiple segments of media files

Posted by cutandjoin on Sunday February 02, 2025 @02:47AM
from the show-hn dept.

https://cjmapp.net/

and implemented it for MP3.The DSL "CJM" extracts and concatenates segments from multiple files.It integrates features of CUE, M3U, and SQL,just like:---------CJM Cut, Sequence#"blk1"some song.mp300:00:000 0:""00:10:000 1:"02"00:15:000 0:""#"blk2"some song inst.mp300:00:000 1:"01"00:10:000 0:""00:15:000 1:"03"CJM SelectAll, Convert(0,1)CJM MergeCJM AlphabetizeCJM Playback

( Read More... | no comments | 3 points | on HN )
Re:Show HN: I made MP3 editing software based on a custom DSL on Thursday January 16, 2025 @08:59PM (#42733261)
I plan to implement aac support. Cjam is specifically designed for directly editing lossy audio formats.