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root |
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#!/usr/bin/perl |
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use PDL; |
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use PDL::Audio; |
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use PDL::Graphics::PGPLOT; |
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#sub line {} |
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$|=1; |
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$birds = do 'bird-def.pl'; |
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sub hz(){ 44100 } |
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sub bird { |
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my ($dur, $freq, $skew, $amp, $freqenv, $ampenv, $partials) = @_; |
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$freqenv = gen_env $dur, @$freqenv; |
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$ampenv = gen_env $dur, @$ampenv; |
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my $os = gen_oscil $dur, $freq, 0, $freqenv*$skew;#*PDL::Audio::PI2; |
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$os = pdl($partials)->partials2polynomial(1)->polynomial($os) if defined $partials; |
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$os*$ampenv; |
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} |
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sub shuffle($) { # (x y x y ... => ((x y) (x y) ... |
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my $xy = pdl $_[0]; [$xy->slice("1:-1:2"), $xy->slice("0:-1:2")]; |
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} |
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sub gen_bird { |
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my @mix; |
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for (@{+shift}) { |
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my ($beg, $dur, $freq, $skew, $amp, $freqenv, $ampenv, $partials) = @$_; |
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$partials = pdl($partials)->slice("1:-1:2") if $partials; |
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push @mix, ($beg*hz, bird(hz*$dur, $freq/hz, $skew/hz, $amp, shuffle $freqenv, shuffle $ampenv, $partials)); |
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line $mix[-1]; |
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} |
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audiomix @mix; |
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} |
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for (keys %$birds) { |
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print $_; |
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$chirp = (gen_bird $birds->{$_})->cut_leading_silence(0); |
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line $chirp; |
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print "\n"; |
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scale2short($chirp)->playaudio(rate => hz); |
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} |
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