# Algorithmic Media

## Sound

```#!/usr/bin/python

import os

pat1 = "ooo.oo.o.oo."
pat2 = pat1

def do (cmd):
os.system(cmd)

do("rm tmp.raw")

for i in range(13):
print pat1
print pat2
print "----"

for i in range(4):
for (a, b) in zip(pat1, pat2):
if a=="o" and b=="o":
do("cat tones/sample.raw >> tmp.raw")
elif a=="o" or b=="o":
do("cat tones/lo.raw >> tmp.raw")
else:
do("cat tones/silence.raw >> tmp.raw")

pat2 = pat2[1:]+pat2[0]

do("cat tmp.raw | sox -t raw -r 44100 -sw -c 2 - -t .wav pat.wav")
do("rm tmp.raw")
```

## Image Generation

```import os, struct
import math

f = open("test.rgba", "wb")

def do (cmd):
os.system(cmd)

(red, green, blue) = (255, 0, 0)

for x in range(480):
for y in range(480):
# alpha = int(255 * (y / 480.0))
dx = (240 - x)
dy = (240 - y)
d = math.sqrt(dy**2 + dx**2)

alpha = min(255, max(0 , int(255 * (d / 240.0)) ))
data = struct.pack("<BBBB", red, green, blue, alpha)
f.write(data)

f.close()

do("convert -size 480x480 -depth 8 rgba:test.rgba test.png")
```
```import os, struct

i = open("papert.raw", "rb")

f = open("test.rgb", "wb")

for y in range(480):
for x in range(480):

(r, g, b) = struct.unpack("<BBB", pixel)

if y % 2 == 0:
red = x % 255
green = y % 255
blue = 0
data = struct.pack("<BBB", red, green, blue)
else:
data = struct.pack("<BBB", r, g, b)

f.write(data)
```