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Cutoff Formulas


This page details the formulas/methods used in various games to determine which star rating to award a player.

Rock Band Formula


The general formula for determining a cutoff in Rock Band is:
cutoff_score = average_multiplier * total_base_score + ceiling(num_vocal_percussion * percussion_multiplier)

Or for Rock Band 2:

cutoff_score = average_multiplier * (total_base_score + num_vocal_percussion * 25)

average_multiplier - value taken from the tables shown below
total_base_score - the sum of the base scores for all instruments involved in the performance
num_vocal_percussion - the number of percussion notes in the vocals chart, zero if vocals not involved
percussion_multiplier - varies depending on cutoff

Rock Band (360/PS3) unpatched, Track Packs


Instruments1*2*3*4*5*gold*
Guitar0.210.460.771.853.084.68
Bass0.320.691.152.774.627.02
Drums0.210.460.771.853.084.44
Vocals0.210.460.771.853.084.68
Guitar + Bass0.320.681.142.734.557.55
Guitar + Drums0.250.540.912.183.645.73
Guitar + Vocals0.250.540.912.183.646.04
Bass + Drums0.320.681.142.734.557.17
Bass + Vocals0.320.681.142.734.557.55
Drums + Vocals0.250.540.912.183.645.73
Guitar + Bass + Drums0.340.741.232.944.908.20
Guitar + Bass + Vocals0.340.741.232.944.908.63
Guitar + Drums + Vocals0.290.631.052.524.207.03
Bass + Drums + Vocals0.340.741.232.944.908.20
Guitar + Bass + Drums + Vocals0.350.801.343.215.359.36


Rock Band (360/PS3) with Sept 4, 2008 patch


Highlighted cells indicate values that were changed by the patch
Instruments1*2*3*4*5*gold*
Guitar0.210.460.771.853.084.52
Bass0.210.500.902.774.626.78
Drums0.210.460.771.853.084.29
Vocals0.210.460.771.853.084.52
Guitar + Bass0.250.600.902.734.556.95
Guitar + Drums0.250.540.912.183.645.28
Guitar + Vocals0.250.540.912.183.645.56
Bass + Drums0.250.600.992.734.556.60
Bass + Vocals0.250.600.992.734.556.95
Drums + Vocals0.250.540.912.183.645.28
Guitar + Bass + Drums0.290.631.052.944.907.31
Guitar + Bass + Vocals0.290.631.052.944.907.70
Guitar + Drums + Vocals0.290.631.052.524.206.27
Bass + Drums + Vocals0.290.631.052.944.907.31
Guitar + Bass + Drums + Vocals0.350.801.343.215.358.16


Rock Band (PS2 Version), Rock Band 2 (PS2 Version)


Highlighted cells indicate values that are different from patched RB1 (and RB2)
Instruments1*2*3*4*5*gold*
Guitar0.210.460.771.863.104.20
Bass0.320.691.152.764.606.20
Drums0.210.460.771.863.104.20
Vocals0.210.460.771.863.104.20
Guitar + Bass0.290.621.032.494.155.80
Guitar + Drums0.240.510.852.043.404.80
Guitar + Vocals0.240.510.852.043.404.80
Bass + Drums0.290.621.032.494.155.80
Bass + Vocals0.290.621.032.494.155.80
Drums + Vocals0.240.510.852.043.404.80
Guitar + Bass + Drums0.310.661.102.644.406.46
Guitar + Bass + Vocals0.310.661.102.644.406.46
Guitar + Drums + Vocals0.270.580.972.343.905.80
Bass + Drums + Vocals0.310.661.102.644.406.46
Guitar + Bass + Drums + Vocals0.350.751.242.984.977.70


Rock Band 2 (360/PS3)


Highlighted cells indicate changed values from patched RB1
Instruments1*2*3*4*5*gold*
Guitar0.210.460.771.853.084.52
Bass0.210.500.902.774.626.78
Drums0.210.460.771.853.084.29
Vocals0.210.460.771.853.084.18
Guitar + Bass0.250.600.992.734.556.95
Guitar + Drums0.250.540.912.183.645.28
Guitar + Vocals0.250.540.912.183.645.28
Bass + Drums0.250.600.992.734.556.60
Bass + Vocals0.250.600.992.734.556.60
Drums + Vocals0.250.540.912.183.645.18
Guitar + Bass + Drums0.290.631.052.944.907.31
Guitar + Bass + Vocals0.290.631.052.944.907.31
Guitar + Drums + Vocals0.290.631.052.524.206.27
Bass + Drums + Vocals0.290.631.052.944.907.31
Guitar + Bass + Drums + Vocals0.350.801.343.215.358.16

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