======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '341'
                                          'artist'  'G-Spott'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'N-R-G (Promo)'
                                           'quals'  ("['Q-HAP-3', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-3', 'q-syn-3', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['dance', 'trance', 'hard trance', 'dutch', 'electronic', 'house']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance;loc-eur-netherlands;electronic-th-trance'
                                             'bpm'  '139.466'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '139.466'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-dance',
 'loc-eur-netherlands',
 'electronic-th-trance']
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'N-R-G (Promo)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'G-Spott'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['dance', 'trance', 'hard trance', 'dutch', 'electronic', 'house']
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.07 dB'
'TXXX:replaygain_track_peak'                        '0.740201'

========================== row from database ==========================
                                              'id'  1403352
                                            'path'  /data/Music/Bulk/00poprockelectronic-generic-dance-trapbeat/Top 40/G-Spott - N-R-G.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  341
                                           'genre'  electronic-generic or radio-dance;loc-eur-netherlands;electronic-th-trance
                                        'filesize'  5457792
                                           'mtime'  1621630027
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic generic dance trapbeat Top 40 electronic generic or radio dance;loc eur netherlands;electronic th trance
                                      'tag_artist'  G-Spott
                                     'tag_release'  None
                                       'tag_title'  N-R-G (Promo)
                                             'bpm'  139.466
                                    'search_title'  'g':3 'n':1 'nrg':4 'promo':5,6 'r':2
                                   'search_artist'  'g':1 'gspott':3 'spott':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '40':6 'dance':3,10,12 'electronic':7,16,18 'eur':14 'generic':2 'loc':11,13 'netherlands':15,17 'or':8 'radio':9 'th':19 'top':5 'trance':20 'trapbeat':4
                                    'search_combo'  '00poprockelectronic':10 '40':15 'dance':12,19,21 'electronic':16,25,27 'eur':23 'g':3A,7B 'generic':11 'gspott':9B 'loc':20,22 'n':1A 'netherlands':24,26 'nrg':4A 'or':17 'promo':5A,6A 'r':2A 'radio':18 'spott':8B 'th':28 'top':14 'trance':29 'trapbeat':13
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-1', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'trance', 'hard trance', 'dutch', 'electronic', 'house']
                                        'tag_date'  2001
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621630026.6940293  (2021-05-21 22:47:06)
                             'size'  5457792