use original audio as is, do not modify backing track at all, use original audio as primary source, strictly preserve original arrangement, structure, timing, groove and tempo, keep original percussion patterns, hits, fills and dynamics exactly, do not replace or simplify drums, no additional drum layers, no electronic drums, percussion must remain dominant and clear, keep original synth sounds, tones and melodies exactly especially intro and outro, do not add new instruments, do not change instrumentation, do not rearrange, do not reharmonize, do not alter melody, do not create new melodic phrases, only replace piano lead with male vocal strictly following original melody and timing, vocal sits on top only, backing track unchanged, no ballad style, no tempo change, no structure change, minimal changes overall, keep full length, do not cut or shorten