def uniform_white_noise_wave(wave_out, amplitude, seed, duration):
"""
Plays a uniform white noise wave with the parameters you specify.
Args:
wave_out(:any:`DoubleValue`): variable onto which the white noise wave plays.
amplitude(:any:`DoubleValue`): amplitude of the white noise wave.
seed(:any:`I32Value`): seed for random number generator.
duration(:any:`DoubleValue`): duration, in seconds, to play the white noise wave.
"""
x_seed = I32Value(0)
y_seed = I32Value(0)
z_seed = I32Value(0)
init_time = DoubleValue(0)
seed_sum = DoubleValue(0)
x_seed.value = seed.value
y_seed.value = (seed.value * 8191) & 16383
z_seed.value = (y_seed.value * 8191) & 16383
init_time.value = seqtime()
while seqtime() - init_time.value < duration.value:
x_seed.value = rem(x_seed.value * 171.0, 30269.0)
y_seed.value = rem(x_seed.value * 172.0, 30307.0)
z_seed.value = rem(x_seed.value * 170.0, 30323.0)
seed_sum.value = (x_seed.value / 30269.0) + (
y_seed.value / 30307.0) + (z_seed.value / 30323.0)
wave_out.value = amplitude.value * (
(seed_sum - floor(seed_sum.value)) - 0.5) * 2.0
localhost_wait(deltat())
nivs_yield()
def sawtooth_wave(wave_out, amplitude, freq, phase, bias, duration):
"""
Plays a sawtooth wave with the parameters you specify.
Args:
wave_out(:any:`DoubleValue`): variable onto which the sawtooth wave plays.
amplitude(:any:`DoubleValue`): amplitude of the sawtooth wave.
freq(:any:`DoubleValue`): frequency, in Hz, of the sawtooth wave.
phase(:any:`DoubleValue`): phase, in degrees, of the sawtooth wave.
bias(:any:`DoubleValue`): offset to add to the sawtooth wave.
duration(:any:`DoubleValue`): duration, in seconds, to play the sawtooth wave.
"""
init_time = DoubleValue(0)
curr_phase = DoubleValue(0)
init_time.value = seqtime()
while seqtime() - init_time.value < duration.value:
curr_phase.value = rem(
(freq.value * 360.0 * (seqtime() - init_time.value)) + phase.value,
360.0)
if curr_phase.value < 180.0:
wave_out.value = (
(curr_phase.value / 180.0) * amplitude.value) + bias.value
else:
wave_out.value = (((curr_phase.value / 180.0) - 2.0) *
amplitude.value) + bias.value
localhost_wait(deltat())
nivs_yield()
def square_wave(wave_out, amplitude, freq, phase, bias, duty_cycle, duration):
"""
Plays a square wave with the parameters you specify.
Args:
wave_out(:any:`DoubleValue`): variable onto which the square wave plays.
amplitude(:any:`DoubleValue`): amplitude of the square wave.
freq(:any:`DoubleValue`): frequency, in Hz, of the square wave.
phase(:any:`DoubleValue`): phase, in degrees, of the square wave.
bias(:any:`DoubleValue`): offset to add to the square wave.
duty_cycle(:any:`DoubleValue`): percentage of time the square wave remains high versus low over one period.
duration(:any:`DoubleValue`): time, in seconds, to play the square wave.
"""
init_time = DoubleValue(0)
curr_phase = DoubleValue(0)
init_time.value = seqtime()
while seqtime() - init_time.value < duration.value:
curr_phase.value = rem(((freq.value * 360.0 *
(seqtime() - init_time.value)) + phase.value),
360.0)
if curr_phase.value < (duty_cycle.value * 3.6):
wave_out.value = amplitude.value + bias.value
else:
wave_out.value = -amplitude.value + bias.value
localhost_wait(deltat())
nivs_yield()
