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  • Committer: Package Import Robot
  • Author(s): Tiago Bortoletto Vaz
  • Date: 2012-06-08 20:35:45 UTC
  • Revision ID: package-import@ubuntu.com-20120608203545-4z7kcf2lgvpsk18y
Tags: upstream-0.6.1
Import upstream version 0.6.1

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examples/effects/05_fuzz_disto.py
 
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#!/usr/bin/env python
 
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# encoding: utf-8
 
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"""
 
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Fuzz distortion. High gain followed by, asymmetrical clipping, 
 
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hard clip on top, soft compression on bottom.
 
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"""
 
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from pyo import *
 
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s = Server().boot()
 
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SOURCE = "../snds/flute.aif"
 
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BP_CENTER_FREQ = 250
 
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BP_Q = 2
 
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BOOST = 5
 
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LP_CUTOFF_FREQ = 3500
 
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BALANCE = 0.8
 
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src = SfPlayer(SOURCE, loop=True).mix(2)
 
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# Transfert function for signal lower than 0
 
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low_table = ExpTable([(0,-.25),(4096,0),(8192,0)], exp=10)
 
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# Transfert function for signal higher than 0
 
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high_table = CosTable([(0,0),(4096,0),(4598,1),(8192,1)])
 
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# Bandpass filter and boost gain applied on input signal
 
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bp = Biquad(src, freq=BP_CENTER_FREQ, q=BP_Q, type=2)
 
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boost = Sig(bp, mul=BOOST)
 
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# Split signal into positive and negative part
 
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sign = Compare(boost, comp=0, mode=">=")
 
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sw = Switch(boost, outs=2, voice=sign)
 
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# Apply transfert function
 
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lowsig = Lookup(low_table, sw[0])
 
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highsig = Lookup(high_table, sw[1])
 
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# Lowpass filter on distorted signal
 
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lp = Tone(lowsig+highsig, freq=LP_CUTOFF_FREQ, mul=.3)
 
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# Balance between dry and wet signals
 
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out = Interp(src, lp, interp=BALANCE).out()
 
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s.gui(locals())
 
 
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