SOL-1 Loudness Optimizer for Windows
SOL-1 is a standalone loudness optimization tool for Windows, designed for music producers, YouTubers, and content creators who need fast, accurate loudness normalization without the complexity.
Simply drag and drop a WAV file — SOL-1 analyzes the current LUFS and True Peak before processing, so you can review the results and decide whether to proceed. No guesswork, no unnecessary steps.
Overview
SOL-1 uses a two-pass FFmpeg loudnorm process compliant with ITU-R BS.1770-4, the international standard for broadcast and streaming loudness. Whether you need to optimize for YouTube, Spotify, or Apple Music, SOL-1 handles it in seconds.
Features
- Pre-processing analysis — review LUFS, True Peak, and gain before any changes are made
- Two-pass loudness processing compliant with ITU-R BS.1770-4
- Presets for YouTube (-14 LUFS), Spotify (-14 LUFS), Apple Music (-16 LUFS), and Other (-14 LUFS / custom)
- Target LUFS adjustable from -25 to -5 LUFS
- True Peak options: -1.5 / -1.0 / -0.5 dBTP
- Output saved in the same folder as the source file
- Original bit depth and sample rate preserved
- FFmpeg included — no additional installation required
- Can also be used as a standalone loudness measurement tool
Specifications
| Supported Format | WAV |
| Output | Same folder as source, filename appended with “_SOL1” |
| Bit Depth | Inherited from source (16-bit / 24-bit / 32-bit→24-bit) |
| Sample Rate | Unchanged from source |
| Processing | ITU-R BS.1770-4 compliant two-pass loudnorm |
System Requirements
- FFmpeg: Included in the package
- OS: Windows 10 / 11 (64-bit)
Get SOL-1