======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '237'
                                          'artist'  'E-Rotic'
                                     'text_people'  ''
                                         'release'  'Best Of E-Rotic'
                                           'title'  'Fred come to bed'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-3', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['dance', 'eurodance', 'techno', 'electronic', '90s']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '14'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '144.130'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Best Of E-Rotic'
'TBPM' (BPM (beats per minute))                     '144.130'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Fred come to bed'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'E-Rotic'
'TRCK' (Track number/Position in set)               '14'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['dance', 'eurodance', 'techno', 'electronic', '90s']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.20 dB'
'TXXX:replaygain_track_peak'                        '0.502630'

========================== row from database ==========================
                                              'id'  1323795
                                            'path'  /data/Music/Bulk/00poprockelectronic/E-Rotic/Best Of E-Rotic__MBZ;#E-Rotic;#Best of E-rotic;#14;#Fred come to bed.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  237
                                           'genre'  electronic-th-techno
                                        'filesize'  3794465
                                           'mtime'  1620569143
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Rotic__MBZ;#E Rotic;#Best of rotic;#14;#Fred electronic th techno
                                      'tag_artist'  E-Rotic
                                     'tag_release'  Best Of E-Rotic
                                       'tag_title'  Fred come to bed
                                             'bpm'  144.13
                                    'search_title'  'bed':4 'come':2 'fred':1 'to':3
                                   'search_artist'  'e':1 'erotic':3 'rotic':2
                                  'search_release'  'best':1 'e':3 'erotic':5 'of':2 'rotic':4
                                     'search_rest'  '00poprockelectronic':1 '14':14,17 'best':9,11 'e':4,7 'electronic':19 'fred':15,18 'mbz':3,6 'of':12 'rotic':2,5,8,10,13,16 'techno':21 'th':20
                                    'search_combo'  '00poprockelectronic':13 '14':26,29 'bed':4A 'best':8C,21,23 'come':2A 'e':5B,10C,16,19 'electronic':31 'erotic':7B,12C 'fred':1A,27,30 'mbz':15,18 'of':9C,24 'rotic':6B,11C,14,17,20,22,25,28 'techno':33 'th':32 'to':3A
                                    'tag_tracknum'  14
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['dance', 'eurodance', 'techno', 'electronic', '90s']
                                        'tag_date'  1995
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620569142.580186  (2021-05-09 16:05:42)
                             'size'  3794465