use strict;
use Data::Dumper;

my $ref = [
   ['',''],
   ['',''],
   ['funct1','',''],
   ['',''],
   ['',['',['funct2a','funct2b',''],''],''],
   'funct3',
   'funct4',
   'funct5',
   'funct6',
   'funct7',
];

my @flat = Dumper($ref) =~ /'(\w+)/g;

print join("\n",@flat),"\n";
[download]

jeffa

L-LL-L--L-LL-L--L-LL-L--
-R--R-RR-R--R-RR-R--R-RR
B--B--B--B--B--B--B--B--
H---H---H---H---H---H---
(the triplet paradiddle with high-hat)