def construct(self):
"""Given a Wave object, produces a soundwave which can be written to
file.
Global vars:
possible_shapes: List of strings
used to keep track of what kinds of waves can be constructed in a
way which can be queried by other modules.
Internal vars:
waveform:
The audible protion of the wave.
"""
if self.shape == "sine":
waveform = wb.sine_wave(self.frequency, self.sample_rate, self.amplitude)
if self.shape == "square":
waveform = wb.square_wave(self.frequency, self.sample_rate, self.amplitude)
if self.shape == "damped":
waveform = wb.damped_wave(self.frequency, self.sample_rate, self.amplitude)
if self.shape == "white_noise":
waveform = wb.white_noise(self.amplitude)
i = -1 # A counter to keep position in the waveform.
before_postwait = self.total_ticks - self.postwait
while True:
i += 1
cursor = i % self.total_ticks
# Cursor here represents the position in the waveform
if cursor <= self.prewait:
yield 0
elif self.prewait < cursor <= before_postwait:
yield waveform.next()
else:
yield 0
def sound_write(self, frequency=440.0, duration=10.0, amplitude=0.1): square_wave = wavebender.square_wave(frequency, amplitude=amplitude); channels = ((square_wave,),) samples = wavebender.compute_samples(channels, 44100 * duration * 1) self._samples_write(samples, duration);
#!/usr/bin/env python
import wavebender
from math import cos
import sys
f =open ("test.wav", 'wb');
square_wave = wavebender.square_wave(440.0, amplitude=0.1)
channels = ((square_wave,),)
duration = 2
samples = wavebender.compute_samples(channels, 44100 * duration * 1)
wavebender.write_wavefile(f, samples, 44100 * duration * 1, nchannels=1)
