Frequently Asked Questions

The full version costs a one-time €29,00 (no subscription, no cloud account). You can try LUFS Converter Pro for free before purchasing. Order your license via the order form.

Yes. LUFS Converter Pro runs on Windows 10 and Windows 11 (64-bit).

	Minimum	Recommended
Operating system	Windows 10/11 (64-bit)	Windows 11 (64-bit)
Processor	2 cores	4 or more
Memory	4 GB	8 GB or more
Disk space	~300 MB + your audio files	Room for originals and copies
Screen	1366 × 768	1920 × 1080
Internet	Not required	–
Admin rights	Not required	–

Operating system
Windows 10 or Windows 11 (64-bit). Older 32-bit systems are not supported. The program is available for Windows only – not for Mac.

Processor
At least 2 cores, 4 or more recommended. When processing many files, several tracks are handled at the same time – on a slower PC that can take noticeably longer.

Memory
At least 4 GB, 8 GB or more recommended for large collections. If memory runs low, the program will let you know and suggest processing fewer files at once.

Disk space
About 300 MB for installation. You also need space for your audio files. With a separate destination folder: room for the new files. Without a destination folder: roughly twice as much space in the source folder, because originals are backed up in the _original subfolder first. The folders must be writable.

Screen
At least 1366 × 768 pixels. On smaller screens the program starts maximized. The window can be resized down to 600 × 400 pixels.

Installation
Everything you need is included in the setup – nothing extra to install. No administrator rights required. The program installs in your user folder and saves your settings there.

Internet
Not required for everyday use or license activation. You only need internet to download the program and place an order on the website.

Audio formats
MP3, FLAC, and WAV. M4A/AAC is not supported. A sound card is not required – only files are processed, nothing is played back.

License
License information is stored on your PC in your user profile.

No. LUFS Converter Pro is currently available for Windows only. A Mac version is not planned at this time.

After purchase you receive a serial code by email. In the program, open Info/Help → License / Activation, copy your device ID into the order form when buying, then enter the serial code. Activation works entirely offline – no internet connection is required in the app.

The program processes MP3, FLAC, and WAV files in batch mode, including subfolders. M4A/AAC is not supported for licensing reasons. Audio quality and format details are preserved where possible; FLAC metadata is copied automatically.

LUFS Converter Pro lets you test all core features: presets, two-stage loudness analysis, True Peak, and CSV report. Limits: max. 5 files, each processed for up to 40 seconds. The full version removes both limits. One license is bound to one Windows device via serial code – all features remain available within the trial limits.

Five presets plus custom values: Spotify/YouTube (-14 LUFS, -1.0 dBTP), Apple Music (-16 LUFS, -1.0 dBTP), Podcast/General (-18 LUFS, -0.5 dBTP), EBU R128 Broadcast (-23 LUFS, -1.0 dBTP), and Custom (manual LUFS and True Peak). Details: Apple Music settings · Spotify settings.

In the first pass, the program measures the loudness of each file (LUFS, True Peak, and dynamic range). In the second pass, the level is adjusted precisely – as a pure volume shift without extra compression, so there are no audible artefacts or level jumps. Learn more in our guide: Two-stage normalization explained.

Classic loudness leveling usually means turning up quiet passages and turning down loud ones – manually with faders, with a compressor/limiter, or with a simple Normalize function in an audio editor. That often targets peak level or short-term level: loud files get quieter, quiet files louder, but the result is not comparable across many tracks and says little about how loud something feels overall.

LUFS normalization (EBU R128) measures perceived loudness across the entire file in a standardized way – the same unit streaming services and broadcast use. You set a target (e.g. -14 LUFS for Spotify, -18 LUFS for podcasts) and every file lands at that measurable level. LUFS Converter Pro does this in two passes with linear=true: pure gain adjustment without extra compression, so dynamics stay natural. True Peak limiting protects against clipping after export.

In short: manual leveling is subjective and inconsistent in batch jobs; LUFS is measurable, repeatable, and ideal for entire folders. Related: EBU R128 vs. ReplayGain.

Use the matching preset: Spotify/YouTube (-14 LUFS), Apple Music (-16 LUFS), Podcast/General (-18 LUFS, True Peak -0.5 dBTP by default), or EBU R128 (-23 LUFS). You can adjust True Peak manually (-0.5 / -1.0 / -2.0 dBTP). Guides: Normalize a podcast · LUFS for Spotify.

ReplayGain stores loudness markers for compatible players; EBU R128 measures loudness in LUFS and is the standard for streaming and broadcast. LUFS Converter Pro uses EBU R128 with two-stage normalization and True Peak control. Full comparison: EBU R128 vs. ReplayGain.

Add your episode folder(s), select Podcast / General (-18 LUFS, True Peak -0.5 dBTP). Optionally set True Peak to -1.0 dBTP for extra headroom after export. Start normalization and review the CSV report. Walkthrough: Normalize a podcast: step by step.

Yes. Click Add under source folders as often as needed – all MP3, FLAC, and WAV files in those folders and subfolders are processed in one run. Optionally choose a separate destination folder so originals stay untouched.

Without a destination folder: originals are moved to a backup folder in each source directory before normalized files replace them in place. With a destination folder: source files remain unchanged; normalized copies are written to the target folder.

After each successful run the program automatically saves an Excel-compatible CSV file with filename, path, target loudness, True Peak, before/after values, and status per file. Guide: Understanding the CSV report.

Version 3.0.0 is a major update: built-in audio engine (no FFmpeg), new Qt interface, and improved handling of large libraries. See the full changelog for v3.0.0.

No. Each license is bound to exactly one Windows device (device ID). For a second computer you need a separate license. This keeps activation simple and fully offline.

True Peak catches peaks that fall between digital sample points and can cause clipping after encoding – especially with streaming services. LUFS Converter Pro offers selectable True Peak limiting (-0.5 / -1.0 / -2.0 dBTP). Details in Why True Peak matters.