[LongGone]

scratch,1234567
ASDF(spacebar)JKL
Left pinky, ring, middle, index || Right thumb, index, middle, ring

Most players use something similar to this setup. Mine is

(LShift)ASD(spacebar)M,.
Left hand all 5 fingers, Right index, middle, ring

In general most KB players use both ring, middle, index fingers and one thumb to hit the main 7 keys, and then the pinkies to hit the scratch

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If you play IIDX, the Hi-Speed isn't linear. Fow low bpm songs you would use a very high value like HS4-5, while for a high 200+bpm song you'd only use say HS1 or 1.5

The Hi-Speed for LR2 is linear. 300bpm with HS150 will read the same as 150bpm HS300 (someone correct me if wrong).

Skin doesn't matter, use what you're comfortable with. Most importantly for BMS, be very comfortable with reading notes; you'll need it for harder songs