Cutoff Formulas

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This page details the formulas/methods used in various games to determine which star rating to award a player.
Needs explanations of how to get base score for guitar/drums, perhaps that deserves its own page?

Guitar Hero

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Stub

Guitar Hero 2/80s/3

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Stub

Rock Band (unpatched)

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Instruments	1*	2*	3*	4*	5*	gold*
Guitar	0.21	0.46	0.77	1.85	3.08	4.68
Bass	0.32	0.69	1.15	2.77	4.62	7.02
Drums	0.21	0.46	0.77	1.85	3.08	4.44
Vocals	0.21	0.46	0.77	1.85	3.08	4.68
Guitar + Bass	0.32	0.68	1.14	2.73	4.55	7.55
Guitar + Drums	0.25	0.54	0.91	2.18	3.64	5.73
Guitar + Vocals	0.25	0.54	0.91	2.18	3.64	6.04
Bass + Drums	0.32	0.68	1.14	2.73	4.55	7.17
Bass + Vocals	0.32	0.68	1.14	2.73	4.55	7.55
Drums + Vocals	0.25	0.54	0.91	2.18	3.64	5.73
Guitar + Bass + Drums	0.34	0.74	1.23	2.94	4.90	8.20
Guitar + Bass + Vocals	0.34	0.74	1.23	2.94	4.90	8.63
Guitar + Drums + Vocals	0.29	0.63	1.05	2.52	4.20	7.03
Bass + Drums + Vocals	0.34	0.74	1.23	2.94	4.90	8.20
Guitar + Bass + Drums + Vocals	0.35	0.80	1.34	3.21	5.35	9.36

Rock Band (with cutoff patch)

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Highlighted cells indicate values that were changed by the patch

Instruments	1*	2*	3*	4*	5*	gold*
Guitar	0.21	0.46	0.77	1.85	3.08	4.52
Bass	0.21	0.50	0.90	2.77	4.62	6.78
Drums	0.21	0.46	0.77	1.85	3.08	4.29
Vocals	0.21	0.46	0.77	1.85	3.08	4.52
Guitar + Bass	0.25	0.60	0.90	2.73	4.55	6.95
Guitar + Drums	0.25	0.54	0.91	2.18	3.64	5.28
Guitar + Vocals	0.25	0.54	0.91	2.18	3.64	5.56
Bass + Drums	0.25	0.60	0.99	2.73	4.55	6.60
Bass + Vocals	0.25	0.60	0.99	2.73	4.55	6.95
Drums + Vocals	0.25	0.54	0.91	2.18	3.64	5.28
Guitar + Bass + Drums	0.29	0.63	1.05	2.94	4.90	7.31
Guitar + Bass + Vocals	0.29	0.63	1.05	2.94	4.90	7.70
Guitar + Drums + Vocals	0.29	0.63	1.05	2.52	4.20	6.27
Bass + Drums + Vocals	0.29	0.63	1.05	2.94	4.90	7.31
Guitar + Bass + Drums + Vocals	0.35	0.80	1.34	3.21	5.35	8.16