def segment_violin(start=1.2, duration=0.6):
wave = thinkdsp.read_wave('92002__jcveliz__violin-origional.wav')
# extract a segment
segment = wave.segment(start, duration)
segment.normalize()
segment.apodize()
segment.write('violin_segment1.wav')
# plot the spectrum
spectrum = segment.make_spectrum()
n = len(spectrum.hs)
spectrum.plot(high=n/2)
thinkplot.Save(root='violin2',
xlabel='frequency (Hz)',
ylabel='amplitude density')
# print the top 5 peaks
peaks = spectrum.peaks()
for amp, freq in peaks[:10]:
print freq, amp
# compare the segments to a 440 Hz Triangle wave
note = thinkdsp.make_note(69, 0.6,
sig_cons=thinkdsp.TriangleSignal,
framerate=segment.framerate)
wfile = thinkdsp.WavFileWriter('violin_segment2.wav', note.framerate)
wfile.write(note)
wfile.write(segment)
wfile.write(note)
wfile.close()
def segment_violin(start=1.2, duration=0.6):
wave = thinkdsp.read_wave('92002__jcveliz__violin-origional.wav')
# extract a segment
segment = wave.segment(start, duration)
segment.normalize()
segment.apodize()
segment.write('violin_segment1.wav')
# plot the spectrum
spectrum = segment.make_spectrum()
n = len(spectrum.hs)
spectrum.plot(high=n / 2)
thinkplot.Save(root='violin2',
xlabel='frequency (Hz)',
ylabel='amplitude density')
# print the top 5 peaks
peaks = spectrum.peaks()
for amp, freq in peaks[:10]:
print freq, amp
# compare the segments to a 440 Hz Triangle wave
note = thinkdsp.make_note(69,
0.6,
sig_cons=thinkdsp.TriangleSignal,
framerate=segment.framerate)
wfile = thinkdsp.WavFileWriter('violin_segment2.wav', note.framerate)
wfile.write(note)
wfile.write(segment)
wfile.write(note)
wfile.close()
def sin_spectrum():
wave = thinkdsp.make_note(69, 0.5, SinSignal)
spectrum = wave.spectrum()
spectrum.plot()
thinkplot.Show()
peaks = spectrum.peaks()
print peaks[0]
wave2 = spectrum.make_wave()
wave2.plot()
thinkplot.Show()
wave2.write()
def sin_spectrum():
wave = thinkdsp.make_note(69, 0.5, SinSignal)
spectrum = wave.spectrum()
spectrum.plot()
thinkplot.Show()
peaks = spectrum.peaks()
print peaks[0]
wave2 = spectrum.make_wave()
wave2.plot()
thinkplot.Show()
wave2.write()
def sin_spectrum():
"""Plots the spectrum of a sine wave.
"""
wave = thinkdsp.make_note(69, 0.5, SinSignal)
spectrum = wave.spectrum()
spectrum.plot()
thinkplot.Show()
peaks = spectrum.peaks()
print(peaks[0])
wave2 = spectrum.make_wave()
wave2.plot()
thinkplot.Show()
wave2.write()
