[Scipy-tickets] [SciPy] #547: chirp - logarithmic cosine sweep - bad initial value and incorrect waveform

SciPy scipy-tickets@scipy....
Sun Nov 2 10:16:52 CST 2008


#547: chirp - logarithmic cosine sweep  - bad initial value and incorrect
waveform
--------------------------+-------------------------------------------------
 Reporter:  knorthover    |        Owner:  somebody
     Type:  defect        |       Status:  new     
 Priority:  normal        |    Milestone:  0.7.0   
Component:  scipy.signal  |      Version:          
 Severity:  major         |   Resolution:          
 Keywords:                |  
--------------------------+-------------------------------------------------
Comment (by Christian):

 Hence line 180 should be

        phase_angle = 2*pi * (f0*t + (pow(10,beta*t)-1)/(beta*log(10)))

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Ticket URL: <http://scipy.org/scipy/scipy/ticket/547#comment:2>
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