======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '285'
                                          'artist'  'Altan'
                                     'text_people'  ''
                                         'release'  'The Best of Altan'
                                           'title'  'An Feochan'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-3', 'Q-LOCALNESS-4', 'Q-OLDST-1', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['irish folk', 'celtic', 'irish', 'folk', 'world']"
                                     'discogstags'  "['folk, world, & country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'ifs-songwriter-folk;loc-eur'
                                             'bpm'  '138.607'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'PRIV:AverageLevel:Þ\x0b\x00\x00'                   PRIV(owner='AverageLevel', data=b'\xde\x0b\x00\x00')
'PRIV:PeakValue:þO\x00\x00'                         PRIV(owner='PeakValue', data=b'\xfeO\x00\x00')
'TALB' (Album/Movie/Show title)                     'The Best of Altan'
'TBPM' (BPM (beats per minute))                     '138.607'
'TCON' (Content type, a.k.a. Genre)                 ['ifs-songwriter-folk', 'loc-eur']
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'An Feochan'
'TKEY' (Initial key)                                '9A'
'TLEN' (Length)                                     '285022'
'TMED' (Media type)                                 'DIG'
'TPE1' (Lead performer(s)/Soloist(s))               'Altan'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:discogstags'                                  'folk, world, & country'
'TXXX:lastfmtags'                                   ['irish folk', 'celtic', 'irish', 'folk', 'world']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.35 dB'
'TXXX:replaygain_track_peak'                        '0.441921'

========================== row from database ==========================
                                              'id'  1350147
                                            'path'  /data/Music/Bulk/00poprockelectronic/Altan/02 Horse with a heart/Altan - 11 - An Feochan.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  285
                                           'genre'  ifs-songwriter-folk;loc-eur
                                        'filesize'  4562818
                                           'mtime'  1621627358
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 02 Horse with heart 11 ifs songwriter folk;loc eur
                                      'tag_artist'  Altan
                                     'tag_release'  The Best of Altan
                                       'tag_title'  An Feochan
                                             'bpm'  138.607
                                    'search_title'  'an':1 'feochan':2
                                   'search_artist'  'altan':1
                                  'search_release'  'altan':4 'best':2 'of':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 'eur':11 'folk':7,9 'heart':4 'horse':2 'ifs':5 'loc':8,10 'songwriter':6 'with':3
                                    'search_combo'  '00poprockelectronic':8 'altan':3B,7C 'an':1A 'best':5C 'eur':18 'feochan':2A 'folk':14,16 'heart':11 'horse':9 'ifs':12 'loc':15,17 'of':6C 'songwriter':13 'the':4C 'with':10
                                    'tag_tracknum'  16
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['irish folk', 'celtic', 'irish', 'folk', 'world']
                                        'tag_date'  1995
                                     'discogstags'  ['folk, world, & country']

============================== file details ==============================
                                           'mtime'  1621627358.1279333  (2021-05-21 22:02:38)
                             'size'  4562818