Really Simple Reverb' Script

This takes an impulse response wav (in this example I was using one called spring.wav) and and input.wav and it produces output.wav

This patch is part of my latest push to github.

def reverbInner(signal,convol,grainLength):

    def reverbInnerDo():

        mag=sf.Magnitude(+signal)

        if mag>0:

            signal_=sf.Concatenate(signal,sf.Silence(grainLength))

            signal_=sf.FrequencyDomain(signal_)

            signal_=sf.CrossMultiply(convol,signal_)

            signal_=sf.TimeDomain(signal_)

            newMag=sf.Magnitude(+signal_)

            signal_=sf.NumericVolume(signal_,mag/newMag)        

            # tail out clicks due to amplitude at end of signal 

            return signal_

        else:

            -convol

            return signal

            

    return sf_do(reverbInnerDo)

def reverberate(signal,convol):

    grainLength = sf.Length(+convol)

    convol_=sf.FrequencyDomain(sf.Concatenate(convol,sf.Silence(grainLength)))

    signal_=sf.Concatenate(signal,sf.Silence(grainLength))

    out=[]

    for grain in sf.Granulate(signal_,grainLength):

        (signal_i,at)=grain

        out.append((reverbInner(signal_i,+convol_,grainLength),at))

    -convol_

    return sf.Clean(sf.Normalise(sf.MixAt(out)))

    

(left,right)=sf.ReadFile("temp/input.wav")

(convoll,convolr)=sf.ReadFile("temp/spring.wav")

wleft =reverberate(+left,convoll)

wright=reverberate(+right,convolr)

left=sf.Normalise(sf.MixAt(

    (sf.Pcnt30(wleft),0),

    (sf.Pcnt70(left),00)

))

right=sf.Normalise(sf.MixAt(

    (sf.Pcnt30(wright),0),

    (sf.Pcnt70(right),0)

))

sf.WriteFile32((left,right),"temp/output.wav")