We have found 2 software records in our database eligible for .mswmm to .wma file format conversion.
Even the latest version of Microsoft Video Maker supports the previously used MSWMM format and thus can import these files and work with it. Using the File ► Save movie function is then possible to export only the audio from the projects as WMA.
Updated: July 18, 2022
MSWMM
Files with mswmm extension can be most often found as projects from Microsoft Windows Movie Maker, a video creating/editing software application, included in Microsoft Windows Me, XP, and Vista.
WMA
Files with wma extension are audio files in Advanced Systems Format (advanced Streaming Format, Active Streaming Format), which is multimedia container format sed to store multimedia data. A wma file stores audio in Advanced Systems Format container and compressed by Windows Media Audio (WMA) codec.