======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '157'
                                          'artist'  'Sesamstrasse'
                                     'text_people'  ''
                                         'release'  'Die schönsten Lieder'
                                           'title'  'Ich bin Stolz ein Frosch zu sein (Kermit)'
                                           'quals'  ("['Q-OLDST-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'q-syn-1', "
 "'q-bass-3', 'q-busy-2', 'q-grit-2', 'q-play-2', 'q-chart-2', 'q-drums-1', "
 "'q-other-3', 'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1']")
                                      'lastfmtags'  "['funny', 'german', 'kids', 'tv', 'old']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '07'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'nonmusic-speech-comedy or drama'
                                             'bpm'  '137.3'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

======================== rawer (from filesystem) ========================

'TALB' (Album/Movie/Show title)                     'Die schönsten Lieder'
'TBPM' (BPM (beats per minute))                     '137.3'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-speech-comedy or drama'
'TIT2' (Title/songname/content description)         'Ich bin Stolz ein Frosch zu sein (Kermit)'
'TKEY' (Initial key)                                '7B'
'TLEN' (Length)                                     '157000'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Sesamstrasse'
'TRCK' (Track number/Position in set)               '07'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['funny', 'german', 'kids', 'tv', 'old']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.69 dB'
'TXXX:replaygain_track_peak'                        '0.607262'

========================== row from database ==========================
                                              'id'  1344914
                                            'path'  /data/Music/Bulk/00spent/Cabaret/Waldorf und  Stadler/Kermit - Ich Bin Stolz Ein Frosch Zu Sein.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  157
                                           'genre'  nonmusic-speech-comedy or drama
                                        'filesize'  2527104
                                           'mtime'  1620404483
                                   'redo_metaread'  0
                                        'rest_str'   00spent Cabaret Waldorf und Stadler Bin Ein Zu Sein nonmusic speech comedy or drama
                                      'tag_artist'  Sesamstrasse
                                     'tag_release'  Die schönsten Lieder
                                       'tag_title'  Ich bin Stolz ein Frosch zu sein (Kermit)
                                             'bpm'  137.3
                                    'search_title'  'bin':2 'ein':4 'frosch':5 'ich':1 'kermit':8,9 'sein':7 'stolz':3 'zu':6
                                   'search_artist'  'sesamstrasse':1
                                  'search_release'  'die':1 'lieder':4 'schonsten':2,3
                                     'search_rest'  '00spent':1 'bin':6 'cabaret':2 'comedy':12 'drama':14 'ein':7 'nonmusic':10 'or':13 'sein':9 'speech':11 'stadler':5 'und':4 'waldorf':3 'zu':8
                                    'search_combo'  '00spent':15 'bin':2A,20 'cabaret':16 'comedy':26 'die':11C 'drama':28 'ein':4A,21 'frosch':5A 'ich':1A 'kermit':8A,9A 'lieder':14C 'nonmusic':24 'or':27 'schonsten':12C,13C 'sein':7A,23 'sesamstrasse':10B 'speech':25 'stadler':19 'stolz':3A 'und':18 'waldorf':17 'zu':6A,22
                                    'tag_tracknum'  7
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['funny', 'german', 'kids', 'tv', 'old']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620404483.1034672  (2021-05-07 18:21:23)
                             'size'  2527104