ConvertWithMoss 18, free multi-sample converter: Tonverk, Omnisphere 3, Roland, and more - June 9, 2026

ConvertWithMoss 18 is out now: the new update for the free multi-sample converter brings support for Elektron Tonverk, Omnisphere 3, Roland samplers, and more.

ConvertWithMoss is a must-have tool for multi-sample users. Developed by Jürgen Moßgraber, this open-source tool allows anyone to easily convert multiple samples from one format to another.

Update 18.0 is out now, and it’s a big update with many excellent additions.



ConvertWithMoss 18
Last year, Elektron released the Tonverk multi-sampler. An exciting device, but one that still lacks a convenient sample format. Jürgen Moßgraber, however, managed to crack Elektron’s format mystery and built a converter into the new update.

With the new update 18.0, you can now convert existing multi-samples into emulti patch files compatible with the Elektron Tonverk. According to the developer, the support is still experimental as he does not have a Tonverk unit to test it on.

Another big addition is the support for Spectrasonics Omnisphere 3. Indeed, you can now create multi-sample files that are compatible with Omnisphere 3.

This too was long shrouded in mystery, but Keith Crosley cracked it, and Jürgen has now implemented it. This is a big thing for Omnisphere 3 sound designers.

Fans of vintage Roland sounds can rejoice. ConvertWithMoss 18 can now read a wide range of Roland synths and samplers from the past, including: S-50, S-330, S-550, W-30, S-750, S-770, DJ-70, DJ-70 MkII, and SP-700.

You can now import them, read them, and transform them into another format. Read support only, so you can’t create new ones for these synths or samplers.

The new update also brings loop tuning support for Ableton ADV/ADG, EXS24, Korgmultisample, Kontakt, SFZ, YSFC (partially). Other new additions are:

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  • processing can now up-sample as well (option: ‘Always re-sample’).
  • removed renaming feature
  • made settings and processing dialogs non-resizable.

Plus, there are many improvements and fixes for the various formats. You can read the full changelog on GitHub.

Another brilliant update for the open-source multi-sample converter. Many thanks, Jürgen!

The new 18.0 update is free of charge. ConvertWithMoss 18 is available now for free and runs as a standalone application on macOS, Linux, and Windows.

More information here: mossgrabers

Source: https://synthanatomy.com/2026/06/convertwithmoss.html