======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '246'
                                          'artist'  'The Be Good Tanyas'
                                     'text_people'  ''
                                         'release'  'Blue Horse'
                                           'title'  'The Littlest Birds'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-OLDST-2', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-2']")
                                     'discogstags'  "['blues', 'folk, world, & country', 'folk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '2001'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk'
                                             'bpm'  '143.314'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'PRIV:AverageLevel:Õ\x1f\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xd5\x1f\x00\x00')
'PRIV:PeakValue:ÿ\x7f\x00\x00'                      PRIV(owner='PeakValue', data=b'\xff\x7f\x00\x00')
'TALB' (Album/Movie/Show title)                     'Blue Horse'
'TBPM' (BPM (beats per minute))                     '143.314'
'TCON' (Content type, a.k.a. Genre)                 'ifs-songwriter-folk'
'TDRC' (Recording time)                             '2001'
'TIT2' (Title/songname/content description)         'The Littlest Birds'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'The Be Good Tanyas'
'TPE2' (Band/orchestra/accompaniment)               'The Be Good Tanyas'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['blues', 'folk, world, & country', 'folk']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-1.38 dB'
'TXXX:replaygain_track_peak'                        '0.568936'

========================== row from database ==========================
                                              'id'  321163
                                            'path'  /data/Music/Bulk/00singer-songwriter-eos/The Be Good Tanyas/[2001] Blue Horse/01 The Littlest Birds.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  246
                                           'genre'  ifs-songwriter-folk
                                        'filesize'  4989904
                                           'mtime'  1636400652
                                   'redo_metaread'  0
                                        'rest_str'   00singer songwriter eos [2001] 01 ifs songwriter folk
                                      'tag_artist'  The Be Good Tanyas
                                     'tag_release'  Blue Horse
                                       'tag_title'  The Littlest Birds
                                             'bpm'  143.314
                                    'search_title'  'birds':3 'littlest':2 'the':1
                                   'search_artist'  'be':2 'good':3 'tanyas':4 'the':1
                                  'search_release'  'blue':1 'horse':2
                                     'search_rest'  '00singer':1 '2001':4,5 'eos':3 'folk':7 'ifs':6 'songwriter':2
                                    'search_combo'  '00singer':10 '2001':13,14 'be':5B 'birds':3A 'blue':8C 'eos':12 'folk':16 'good':6B 'horse':9C 'ifs':15 'littlest':2A 'songwriter':11 'tanyas':7B 'the':1A,4B
                                    'tag_tracknum'  1
                                      'num_images'  1
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  2001
                                     'discogstags'  ['blues', 'folk, world, & country', 'folk']

============================== file details ==============================
                                           'mtime'  1636400651.7207038  (2021-11-08 20:44:11)
                             'size'  4989904