Vertere — MIDI → MP3 / ZIP
Vertere
Vertere is a free web app that creates choir practice MP3s from MIDI files, with no installation required. It accepts a full-score MIDI containing every part or separate MIDI files for individual parts. Assign each track to Soprano, Alto, Tenor, Bass, or Piano. In each part-focused mix, the selected part is set to 100%; the other parts start at 50% and can be adjusted. The “All” mix includes every part at an even level. Download all generated MP3s together in a ZIP file. Processing stays in your browser, and uploaded MIDI files are never sent to a server. Send us feature requests, bug reports, or other feedback.