======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '84'
                                          'artist'  'Nofx & Rancid'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Tenderloin'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-3', 'q-play-2', "
 "'q-chart-3', 'q-drums-4', 'q-other-3', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['punk', 'punk rock', 'ska punk', 'ska', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'rock-gr-punk'
                                             'bpm'  '138.134'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '138.134'
'TCON' (Content type, a.k.a. Genre)                 'rock-gr-punk'
'TIT2' (Title/songname/content description)         'Tenderloin'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Nofx & Rancid'
'TXXX:Mp3gain_minmax'                               '135,186'
'TXXX:Mp3gain_undo'                                 '+007,+007,N'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:Tracknum'                                     '03'
'TXXX:lastfmtags'                                   ['punk', 'punk rock', 'ska punk', 'ska', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '3'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.25 dB'
'TXXX:replaygain_track_peak'                        '0.340225'

========================== row from database ==========================
                                              'id'  1288383
                                            'path'  /data/Music/Bulk/00poprockelectronic/Rancid/Rancid & NoFX - Split/Nofx & Rancid - Tenderloin - 03.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  84
                                           'genre'  rock-gr-punk
                                        'filesize'  2026801
                                           'mtime'  1621695976
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic NoFX Split 03 rock gr punk
                                      'tag_artist'  Nofx & Rancid
                                     'tag_release'  None
                                       'tag_title'  Tenderloin
                                             'bpm'  138.134
                                    'search_title'  'tenderloin':1
                                   'search_artist'  'nofx':1 'rancid':2
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'fx':8 'gr':5 'no':7 'nofx':2 'punk':6 'rock':4 'split':3
                                    'search_combo'  '00poprockelectronic':4 'fx':11 'gr':8 'no':10 'nofx':2B,5 'punk':9 'rancid':3B 'rock':7 'split':6 'tenderloin':1A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-3']
                                      'lastfmtags'  ['punk', 'punk rock', 'ska punk', 'ska', 'rock']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621695976.2913113  (2021-05-22 17:06:16)
                             'size'  2026801