You can also use tagged.

Here a simple mp3 command line renamer that use File::Find to traverse the given directory structure:

use strict;
use File::Find;
use MP3::Tag;

my $dir=$ARGV[0];

die "use mp3ren.pl directory_name" if (!$dir);

find (\&wanted, "$dir");

sub wanted {
    
    if (&match("$File::Find::name")) {

        &rename_MP3($File::Find::name);
    }
}

sub match {

    my $filename=$_[0];

    if (-d $filename) {
        return 0;
    }

    my $mp3 = MP3::Tag->new($filename);
    if (defined $mp3) {

        $mp3->get_tags;
        if (exists $mp3->{ID3v1}) {

            return 1;

        } else {

            print "$filename is not mp3 or no ID3v1 tag\n";
            return 0;
        }
    }
}

sub rename_MP3 {

  my $fullname_mp3=$_[0];
  my $mp3 = MP3::Tag->new($fullname_mp3);
  my $new_mp3_name;

  $mp3->get_tags;

  my $song=$mp3->{ID3v1}->song;
  my $artist=$mp3->{ID3v1}->artist;

  if ($artist && $song) {
    $new_mp3_name="$artist--$song";

  } elsif ($song) {
    $new_mp3_name="$song";

  } elsif ($artist) {
    $new_mp3_name="$artist--untitled";

  } else {
    $new_mp3_name="";
  }

  if ($new_mp3_name) {

    $new_mp3_name=~s#[\\|\?|\*|\||\:|"|<|>|/]+##g;
    $new_mp3_name.=".mp3";
    $new_mp3_name="$File::Find::dir/$new_mp3_name";

    if ($fullname_mp3 eq $new_mp3_name) {

        print "Error renaming $fullname_mp3 to $new_mp3_name: same nam
+e\n"

    } elsif (!rename("$fullname_mp3","$new_mp3_name")) {

        print "Error renaming $fullname_mp3 to $new_mp3_name: $!\n"

    } else {

        print "Renamed $fullname_mp3 to $new_mp3_name\n"
    }

  } else {

    print "Error renaming $fullname_mp3: no ID3v1 tag\n"
  }
}
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