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Install guides and notes

Trimify Docs

Updated

How to install Trimify, how to use it safely with Rekordbox, and what to check before a gig. Downloads, checksums, the licence and the privacy notice are on the Trimify page.

What it does

  • Drop in MP3, WAV, AIFF, FLAC or M4A (AAC and ALAC) files or whole folders, or connect a Rekordbox 6 or 7 library and pick the collection or a few playlists.
  • Choose a target loudness in LUFS. Trimify measures each track's loudness and true peak, then shows the gain it applies.
  • Every leveled file keeps its source's format, tags and cover art. Your originals are never edited, unless you choose Rekordbox's Replace files mode.
  • Optional clipping protection or a peak limiter stop loud tracks from clipping. Both are off by default.
  • Everything happens on your computer. There's no account, no analytics, and Trimify doesn't send your files or library anywhere.

Install

Windows 10 and 11
  1. Run the downloaded Trimify_…_x64-setup.exe, and choose whether to install it for just you or for everyone on the computer.
  2. The installer isn't code-signed yet, so Windows may show Windows protected your PC. Click More info, then Run anyway.
  3. Open Trimify from the Start menu.

The MSI is for managed installs: msiexec /i Trimify_…_x64_en-US.msi.

macOS
  1. Download the disk image for your Mac: Apple Silicon for M1 and newer, Intel for older Macs. Not sure which you have? Apple menu → About This Mac → Chip.
  2. Open it, drag Trimify into Applications, then eject the disk image.
  3. Trimify isn't notarised by Apple yet, so macOS blocks the first launch. Open it once and click Done, then go to System Settings → Privacy & Security and click Open Anyway next to Trimify.
  4. If macOS says Trimify "is damaged and can't be opened", run this in Terminal and open it again:
xattr -dr com.apple.quarantine /Applications/Trimify.app
Linux
  • Debian, Ubuntu and Mint: sudo apt install ./Trimify_*_amd64.deb
  • Fedora: sudo dnf install ./Trimify-*.x86_64.rpm
  • Arch: sudo pacman -U trimify-*-x86_64.pkg.tar.zst. It uses the system's FFmpeg and rsgain; rsgain may need to come from the AUR.
  • AppImage: chmod +x Trimify_*_amd64.AppImage, then run it.

Trimify checks for FFmpeg and rsgain, the audio tools it uses, when it starts, and tells you if either is missing.

Before you use it with Rekordbox

  • The trimified folder (default). Leveled copies go into a top-level trimified playlist folder that mirrors the playlists they came from. Copies keep the source's beatgrid, hot cues, memory cues, My Tags, artwork and analysis, and their auto-gain allows for the gain Trimify applied. Your original tracks and playlists aren't changed.
  • Undoing it. Delete the trimified folder and its copies in Rekordbox, or restore the database backup Trimify made.
  • Trying it safely. Copy the Rekordbox data folder somewhere else, then choose that copy's master.db in Trimify.

Known limitations

Read these before a gig
  • Timing of lossy copies. WAV, AIFF, FLAC and ALAC copies are sample-aligned with their sources, so cues and grids line up exactly. MP3 and AAC are re-encoded, and differences in encoder delay can shift audio by a few milliseconds, depending on how the original was made. Spot-check cues on a few lossy tracks.
  • Waveform height. Copies reuse the source's waveform previews, which show the level before leveling until Rekordbox re-analyses the track.
  • Seek data. Copies and relinked tracks have their FLAC seek index and cue seek positions cleared, which is how Rekordbox treats tracks analysed by older versions.
  • Duplicates. Copies share their sources' metadata, so the Collection and any smart playlists show both versions; the trimified folder holds only the leveled ones.
  • Mirroring scope. Processing the whole collection mirrors regular playlists. Smart playlists are mirrored, as ordinary playlists, only when you select them.
  • Not copied: Active Censor edits and hot cue bank lists.
  • Replace files mode doesn't update Rekordbox's stored auto-gain or FLAC seek index; re-analyse those tracks in Rekordbox afterwards.
  • Limiter readings. The limiter aims under −1 dBTP, but ITU true-peak meters, rsgain included, can read up to about 0.25 dB higher on music, and MP3 or AAC encoding adds a small overshoot on top.

Questions