Frequently Asked Questions

The full version is a one-time introductory price of €29.00 (instead of €49.00; no subscription, no cloud account). You can try LUFS Converter Pro for free before purchasing. Order your license via the order form.

Version 3.3.0 is current. The short overview is in the release post (earlier: 3.2.1, 3.1.0, 3.0). More detail is in the changelog.

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 License → License management, 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.

If you already use version 2.x and install version 3.x, version 3.x must be activated separately. A stored 2.x license does not carry over, and serial codes from version 2.x do not work in version 3.x. Version 3.x is sold separately (see Terms & Conditions § 8).

The program processes MP3, FLAC, and WAV files – whole folders 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: ready settings, measure-then-adjust loudness matching, peak protection, analysis preview, and an optional before/after report. Limit: max. 25 files at full length. The full version removes this limit. One license is bound to one Windows device via serial code – all features are available to try; only the file count is limited.

Five ready settings plus custom values: Spotify/YouTube (-14 LUFS), Apple Music (-16 LUFS), Podcast/General (-18 LUFS), EBU R128 Broadcast (-23 LUFS), and Custom (manual LUFS and peak limit). Details: Apple Music settings · Spotify settings.

The program first measures each file (LUFS, True Peak, and dynamic range), then applies a precise level change – as a pure volume shift without extra compression, so there are no audible artifacts or level jumps. There is no separate 1-pass/2-pass switch: one clear workflow for all formats. After saving, the finished file can be checked and refined once if needed (at most two passes). Learn more: 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 measures perceived loudness across the entire file in a standardized way – the same unit streaming services and radio 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 by measuring first, then applying a pure volume adjustment without extra compression, so dynamics stay natural. Peak protection helps avoid clipping after export.

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

Use the matching setting: Spotify/YouTube (-14 LUFS), Apple Music (-16 LUFS), Podcast/General (-18 LUFS), or EBU R128 (-23 LUFS). You can adjust the peak limit if needed. 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 measure-then-adjust normalization and True Peak control. Full comparison: EBU R128 vs. ReplayGain.

Add your episode folder(s), select Podcast / General (-18 LUFS). Optionally tighten the peak limit for extra headroom after export. Start normalization and review the optional report if enabled. 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. Large batches can resume after a stop.

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.

You can optionally save an Excel-compatible report (off by default) with filename, path, target loudness, peak limit, before/after values, and status per file. Enable it under the report option before a run. Guide: Understanding the report.

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 lets you set the True Peak ceiling freely, with quick choices for -0.5 / -1.0 / -2.0 dBTP. Details in Why True Peak matters.