Sorry if my english is poor. I've converted with AYEMUL the original ZX spectrum to YM. Then converted to midi with YM2MIDI, then to protracker with octamed soundstudio with midi resolution=32, this keeps all the notes.
This is a draft version, I don't have enought time to make it perfect, but i hope someone could use as a path. Note the need for more octaves to acomplish all the notes in the original song.
Good Luck Galahad! Thanks for keepin it!