Sometimes it is very handy to have a "Rule of Thirds" overlay:

With our fixtures id3tag raises an exception when addressing Tag#genre apparently.

 1) FormatParser::MP3Parser decodes and estimates duration for a CBR MP3
     Failure/Error: value = tag.public_send(k)
     
     NoMethodError:
       undefined method `gsub' for nil:NilClass
     # /Users/julik/Code/libs/id3tag/lib/id3tag/frames/v2/genre_frame/genre_parser_pre_24.rb:25:in `just_gen

Use-case: sail list -v to list all the installed codecs