import pygame
import numpy

def playnote(pitch, duration):
    pitch = 110 * (2 ** (1./12)) ** pitch
    samples_per_cycle = 44100 / pitch
    values = (numpy.arange(samples_per_cycle) / float(pitch)) * 65535
    values = values.astype(numpy.int32)
    values = numpy.resize(values, (44100,))
    sound = pygame.mixer.Sound(array=values)
    channel = sound.play(-1)
    pygame.time.delay(duration)
    sound.stop()

pygame.mixer.pre_init(44100, -16, 1)
pygame.init()
playnote(0,250)
playnote(2,250)
playnote(3,250)
playnote(0,250)
playnote(7,250)