study-on-bytebeats/study-on-bytebeat-2.py

#!/usr/bin/python

# Study on bytebeat
# By danielinux
# License: GPL
import sys

from random import randint


b = 0x7E

c = 0x30
t=0

bass_note0 = [ 16, 0, 8, 0, 8, 16, 9, 0]
bass_note1 = [ 12, 0, 12, 0, 0, 14,16,0]
bass_note2 = [ 12, 0, 12, 0, 12, 14,16,0]
hi_note0 = [4, 8, 4, 8, 6,8,6,8]
hi_note1 = [12,6,12,6,14,12,14,12]

bd = [ 1, 1, 0, 0, 0, 1, 0, 1 ]
sn = [ 0, 0, 1, 0, 0, 0, 1, 0 , 0, 0, 1, 0, 0, 0, 1, 1] 

snare = [ 0x41,  0x89,  0xAF,  0x49,  0xC6,  0x20,  0xC0,  0x65,  0xCA,  0xAE,  0xB8,  0x42,  0xAD,  0x52,  0x25,  0xAC,  0xFB,  0xD8,  0x6D,  0xD0,  0x6F,  0x41,  0xB5,  0x53,  0x20,  0x81,  0x97,  0x5F,  0xB4,  0xB7,  0x80,  0xC3,  0x89,  0x69,  0x53,  0x5C,  0xB9,  0x65,  0x22,  0xFB,  0x35,  0xE4,  0x94,  0x2E,  0xD9,  0x6E,  0xDB,  0xEA,  0x4B,  0x78,  0x7E,  0x8C,  0x58,  0x46,  0x2C,  0xD0,  0x3A,  0xC5,  0x68,  0x82,  0x81,  0x62,  0x6F,  0xA6,  0xE0,  0xB5,  0x4D,  0x56,  0xF9,  0xF4,  0xD3,  0xBC,  0x6C,  0x66,  0xB4,  0x45,  0xFF,  0x2B,  0xB3,  0xE1,  0x5A,  0x8D,  0xC2,  0x3A,  0xFF,  0x5B,  0xE1,  0x32,  0x23,  0xE4,  0x22,  0xD0,  0x9A,  0x43,  0xD8,  0xA3,  0xF5,  0x5A,  0x3E,  0x38,  0x60,  0x61,  0xCC,  0xFE,  0x3D,  0x84,  0x25,  0xCC,  0x78,  0xCB,  0x30,  0x7D,  0x8F,  0xAB,  0x60,  0x3E,  0xED,  0x7A,  0x9C,  0x9E,  0xFC,  0xF7,  0xC3,  0x5B,  0x80,  0xD0,  0x53,  0xCC]

while 1:
    x = 0
    u = (~(t & 0xFF) & 0xFF)
    beat = t >> 10                
    part = (beat >> 3)     # part
    hit = (t - (beat << 10)) # Hit: 0-1024 
    bnote = (t - ((t >> 10) << 10)) << 6
    note =  (t - ((t >> 14)<<14)) << 5
    note2 =  (t - ((t >> 13)<<13)) << 7

    if (bd[beat & 0x07]) and (hit < 32):
        x = 0xFF;

    #snare
    if (sn[beat & 0x0F]) and (hit < len(snare)):
        x ^=  (snare[hit] >> 1)


    #bass
    if part > 3:
        if (part & 0x03) < 2:
            if (bass_note0[beat % len(bass_note0)] != 0):
                x ^= (bnote / bass_note0[beat % len(bass_note0)]) & (~b)
        elif part & 0x03 == 0x02:
            if (bass_note1[beat % len(bass_note1)] != 0):
                x ^= (bnote / bass_note1[beat % len(bass_note1)]) & (~b)
        else:
            if (bass_note2[beat % len(bass_note2)] != 0):
                x ^= (bnote / bass_note2[beat % len(bass_note2)]) & (~b)

    # voice
    if part > 15:
        if (part & 0x03) < 2:
            if (hi_note0[beat % len(hi_note0)] != 0):
                x ^= (bnote / hi_note0[beat % len(hi_note0)]) & (0x30)
        else:
            if (hi_note1[beat % len(hi_note1)] != 0):
                x ^= (bnote / hi_note1[beat % len(hi_note1)]) & (0x30)

    sys.stdout.write(chr(x & 0xFF))
    t+=1