Free online MOD to OPUS converter

Source format: MOD

MOD is a classic module music format that stores sampled instruments plus note patterns rather than a fully mixed audio stream. It originated on the Amiga and became popular in the demoscene, game music, and tracker communities. MOD files are typically created and edited in tracker software such as ProTracker, FastTracker, or modern compatible trackers. They are valued for their compact size, loop-friendly structure, and the ability to reproduce the original arrangement exactly in compatible players.

Target format: OPUS

OPUS is a modern compressed audio format designed for efficient streaming and speech/music playback at low to high bitrates. It is widely supported by browsers, messaging apps, VoIP tools, and many media players. Compared with older lossy formats, Opus usually offers excellent quality at smaller file sizes, especially for speech and mixed content. It is a good choice when you want a broadly compatible, space-efficient audio file for playback on modern devices.

How to convert MOD to OPUS

Because MOD is a tracker module and OPUS is a rendered audio format, the conversion process is really a module playback/rendering step followed by audio encoding. The most reliable desktop workflow is to use a player or converter that can decode MOD and export to a standard audio file, then encode that audio to Opus.

1. Open the MOD file in a tracker or audio tool that supports module playback. Good options include Audacity with module support via import, foobar2000 with the appropriate decoder, or a tracker/player such as OpenMPT.

2. Render or export the module to an intermediate audio file such as WAV or FLAC. In OpenMPT, for example, use File → Export → Wave or a similar render option. This step turns the pattern-based module into a normal audio recording.

3. Encode the rendered audio to OPUS using a tool such as FFmpeg. A typical command is ffmpeg -i input.wav -c:a libopus -b:a 128k output.opus. You can adjust the bitrate depending on the source material and desired file size.

4. Verify playback in a modern media player that supports Opus, such as VLC, foobar2000, or a browser-based player.

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Notes on quality and limitations

MOD to OPUS is a lossy conversion path in practice, because the module must first be rendered to audio and then compressed with Opus. The original MOD structure, instrument separation, and tracker effects are not preserved in the OPUS file. After conversion, the result is a normal audio recording, not an editable module.

Quality depends heavily on the render settings used during export. If possible, render at a standard sample rate such as 44.1 kHz or 48 kHz and avoid clipping. For music with many details, a bitrate around 128 kbps to 192 kbps is often a good starting point, though lower or higher values may be appropriate depending on the content.

Compatibility is generally excellent for OPUS in modern software, but some older hardware players and legacy editors may not support it. If broad legacy compatibility is required, consider keeping a WAV or FLAC master alongside the OPUS file.