28 lines
566 B
Julia
28 lines
566 B
Julia
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module SpectrumExample
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using GR, PortAudio, SampleTypes
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const N = 1024
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const stream = PortAudioStream(1, 1, bufsize=N)
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const buf = read(stream, N)
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const fmin = 0Hz
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const fmax = 10000Hz
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const fs = Float32[float(f) for f in domain(fft(buf)[fmin..fmax])]
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setwindow(fs[1], fs[end], 0, 100)
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setviewport(0.05, 0.95, 0.05, 0.95)
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setlinecolorind(218)
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setfillintstyle(1)
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setfillcolorind(208)
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setscale(GR.OPTION_X_LOG)
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while true
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read!(stream, buf)
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clearws()
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fillrect(fs[1], fs[end], 0, 100)
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polyline(fs, abs(fft(buf)[fmin..fmax]))
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updatews()
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end
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end
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