PC98 pipo

pipo.py

"""
PC98 PiPo!
======================

# setup and PiPo!

require pygame(sudo or virtualenv)
```
$ pip install pygame
```

$ python pc98.py


thx: https://gist.github.com/ohsqueezy/6540433

"""
from array import array
from time import sleep

import pygame
from pygame.mixer import Sound, get_init, pre_init

class Note(Sound):

    def __init__(self, frequency, volume=.1):
        self.frequency = frequency
        Sound.__init__(self, self.build_samples())
        self.set_volume(volume)

    def build_samples(self):
        period = int(round(get_init()[0] / self.frequency))
        samples = array("h", [0] * period)
        amplitude = 2 ** (abs(get_init()[1]) - 1) - 1
        for time in range(period):
            if time < period / 2:
                samples[time] = amplitude
            else:
                samples[time] = -amplitude
        return samples

if __name__ == "__main__":
    pre_init(44100, -16, 1, 1024)
    pygame.init()

    Note(2000).play(100)
    sleep(0.1)

    Note(1000).play(80)
    sleep(1)