I wanted to reproduce a loop from a song in VCV rack, in a sequencer, so I converted the loop to a WAV file, converted it free/online to a midi file, and built this Patch to convert that MIDI file into a PianoRoll Sequence using only free modules.
Highly experimental, may result in garbage, and could do with a lot of improvements possibly, but for me it did what I wanted, and maybe it is of use to someone else. Had fun building it anyway :).
Story on how it came to be and some hints as to how to use it are in Notes in the patch.
Welcome to the VCV Rack territory of unlimited possibilities by just cabling up one more you can change the whole space. A good idea is never wasted! Keep at it compadre!