# Chip Music Demo 0.0.1
# Copyright 2001 Lja MultiMedia
# May be used under the GNU GPL

"""template.py : Python file header template"""

import struct, math, audioop

def tone(freq, vol, len):
 snd = ""
 for t in range(len):
  snd += struct.pack("b", int(math.sin(t * freq) * vol))
 return snd

dsp = file('/dev/dsp', 'wb')

def play(score, beat=1000):
 for f in score:
  dsp.write(tone(f, 50, beat))
  dsp.flush()

def play2(score, beat=1000):
 for f in score:
  dsp.write(multi(f, 50, beat))
  dsp.flush()

def multi(f, v, l):
 a = tone(f * 0.8, v / 3.0, l)
 b = tone(f, v / 3.0, l)
 c = tone(f * 1.2, v / 3.0, l)
 d = audioop.add(a, b, 1)
 f = audioop.add(c, d, 1)
 return f

def demo():
 s = 1,2,3,4,5,4,5,6,7,5,3,1,2,3,2,3,4,6,8,7,6,5,4,5,4,3,2,3,2
 s2 = []
 for i in s:
  s2.append(i * 25)
 play(s2)

def demo1():
 s = 1,2,3,4,5,4,5,6,7,5,3,1,2,3,2,3,4,6,8,7,6,5,4,5,4,3,2,3,2
 s2 = []
 for i in s:
  s2.append(i * 25)
 play2(s2)

def demo2():
 a = tone(400, 20, 3000)
 b = tone(500, 30, 3000)
 c = tone(600, 20, 3000)
 d = audioop.add(a, b, 1)
 f = audioop.add(c, d, 1)
 dsp.write(f)
 dsp.flush()

if __name__ == "__main__":
 demo1()