#Link video here once live.

from scikits.audiolab import wavread, wavwrite
data, fs, enc = wavread('sounds/Snap.wav')

plot(data[0:300, 0])
grid(1)
ylabel('Voltage')
xlabel('Samples')

from IPython.display import Audio
Audio('sounds/Snap.wav')

#Apply large positive voltage to speaker:

smallSignal = 1*np.ones(1000)

plot(smallSignal, linewidth=2)
grid(1)
ylim([0,1])
xlabel('Samples')
ylabel('Voltage')

wavwrite(smallSignal, 'sounds/smallSignal.wav', fs)
Audio('sounds/smallSignal.wav')

#Apply smaller positive voltage to speaker:

smallSignal = 0.25*np.ones(1000)

plot(smallSignal, linewidth=2)
grid(1)
ylim([0,1])
xlabel('Samples')
ylabel('Voltage')

wavwrite(smallSignal, 'sounds/smallSignal.wav', fs)
Audio('sounds/smallSignal.wav')