BGM Box vs Looping Audio Converter — Which BRSTM Converter is Better?
BGM Box vs Looping Audio Converter — Quick Verdict
BGM Box is the better choice for most users in 2026. It runs entirely in your browser with no installation, supports 100+ input formats via vgmstream, and handles BRSTM, BCSTM, and BFSTM output. Looping Audio Converter is a capable desktop tool for Windows users but requires .NET runtime and only accepts MP3/WAV input.
What is Looping Audio Converter?
Looping Audio Converter (LAC) is a free, open-source .NET Framework desktop application (written in C#) for converting audio files to BRSTM format. It has been a go-to tool in the Nintendo modding community for years, offering loop point editing and batch conversion. However, it runs only on Windows and requires downloading and extracting the software before use.
Side-by-Side Comparison
| Feature | BGM Box | Looping Audio Converter |
|---|---|---|
| Platform | Any device with a browser | Windows (.NET Framework required) |
| Installation | None — works instantly | Must download, extract, and install .NET runtime |
| Input Formats | 100+ (ADX, HCA, FSB, WEM, FLAC...) | MP3, WAV, OGG, FLAC |
| Output Formats | BRSTM, BCSTM, BFSTM | BRSTM only |
| Loop Points | Visual waveform — drag to set | Numeric input — no visual preview |
| Multi-Channel | Up to 8 channels | Up to 2 channels (stereo) |
| Batch Conversion | One file at a time | Yes — bulk processing |
| Reverse Conversion | BRSTM → MP3 / BCSTM → OGG | No — only audio → BRSTM |
| Built-in Player | Yes — with FFT visualizer | No |
| Price | Free | Free (open source) |
When to Use BGM Box
- You want to start converting immediately — no setup, no .NET runtime, no downloads
- You are on a Mac, Linux, ChromeOS, or mobile device where desktop tools are painful to set up
- Your source audio is in a game-specific format (ADX, HCA, FSB, WEM) that LAC does not support
- You need to output BCSTM (3DS) or BFSTM (Wii U / Switch), not just BRSTM
- You want to convert BRSTM files back to MP3 or extract BCSTM to OGG
- You want to preview audio with loop points before converting
When Looping Audio Converter Might Still Be Useful
- You need to batch-convert hundreds of files at once (BGM Box processes one at a time)
- You work entirely offline and prefer a desktop application
- You have an established workflow built around LAC and do not want to change
The Bottom Line
For the vast majority of Nintendo modding tasks in 2026, BGM Box is the faster, more capable, and more convenient choice. It supports more formats, runs on any device, and handles both directions of conversion (audio → BRSTM and BRSTM → audio). Looping Audio Converter remains a solid tool for batch processing on Windows, but its format limitations and .NET dependency make it a secondary option for most users.