As documented in MP3::Info , the functions get_mp3info and get_mp3tag don't return hashes, but hash references. Either store them in scalars, or dereference them to store them in hashes: 
    my $info = get_mp3info($file);
    for my $key (keys %$info) {

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or 
    my %info = %{ get_mp3info($file) };
    for my $key (keys %info) {

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($q=q:Sq=~/;[c](.)(.)/;chr(-||-|5+lengthSq)`"S|oS2"`map{chr |+ord
}map{substrSq`S_+|`|}3E|-|`7**2-3:)=~y+S|`+$1,++print+eval$q,q,a,

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In reply to Re: Reference found where even-sized list expected by choroba
in thread Reference found where even-sized list expected by sciguy

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