This will change the source RealTrack/Drum file type that you have already generate up, keeping the same sections so if you have wma you can change to FLAC WAV etc...
https://stash.reaper.fm/v/47910/Change-selected-realtrack-source-file-type.zip

These will change from DI<>FX keeping all the same sections
https://stash.reaper.fm/v/47911/Change-selected-realtrack-to-direct-input-to-fx.zip

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