Convert mid file to a text music note.?

ýHi ý
ýI'm trying to read the mid file and rewrite it in readable text mode 
(readable for musician)ý
ýI got the standard music note.ý
ýBut how can I convert this numbers to this music note.ý
ýPlz advice ý
ýIf there is a complete example it will be fine  ý

this is the code to read the mid file

#!/usr/bin/perl
# use strict;

use MIDI;

foreach my $file ( @ARGV ) {
	my $song = MIDI::Opus->new(
		from_file => $file,
	) || die "Non riesco a leggere il file - $!\n";
	print "$file\n";
	print $song->dump({flat => 1});
}

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