======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '199'
                                          'artist'  'Skaila Kanga'
                                     'text_people'  ''
                                         'release'  'Harp Moods'
                                           'title'  'SPINNING WHEEL'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-3', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['instrumental', 'harp', 'classical', 'folk', 'ambient']"
                                     'discogstags'  "['folk, world, & country', 'stage & screen', 'classical']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  'B4'
                                      'tracktotal'  ''
                                            'date'  '1982'
                                        'comments'  ''
                                           'genre'  'prerock-classical or classical instruments'
                                             'bpm'  '104.29'
                                             'key'  '4B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Harp Moods'
'TBPM' (BPM (beats per minute))                     '104.29'
'TCON' (Content type, a.k.a. Genre)                 'prerock-classical or classical instruments'
'TDRC' (Recording time)                             '1982'
'TIT2' (Title/songname/content description)         'SPINNING WHEEL'
'TKEY' (Initial key)                                '4B'
'TPE1' (Lead performer(s)/Soloist(s))               'Skaila Kanga'
'TRCK' (Track number/Position in set)               'B4'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['folk, world, & country', 'stage & screen', 'classical']
'TXXX:lastfmtags'                                   ['instrumental', 'harp', 'classical', 'folk', 'ambient']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'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'                        '+2.64 dB'
'TXXX:replaygain_track_peak'                        '0.540990'

========================== row from database ==========================
                                              'id'  289771
                                            'path'  /data/Music/Bulk/00instruments-classical/[boosey & hawkes] - sbh 3083 - skaila kanga - harp moods/B4 SPINNING WHEEL.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  199
                                           'genre'  prerock-classical or classical instruments
                                        'filesize'  7986158
                                           'mtime'  1620561913
                                   'redo_metaread'  0
                                        'rest_str'   00instruments classical [boosey & hawkes] sbh 3083 skaila kanga harp moods B4 prerock classical or classical instruments
                                      'tag_artist'  Skaila Kanga
                                     'tag_release'  Harp Moods
                                       'tag_title'  SPINNING WHEEL
                                             'bpm'  104.29
                                    'search_title'  'spinning':1 'wheel':2
                                   'search_artist'  'kanga':2 'skaila':1
                                  'search_release'  'harp':1 'moods':2
                                     'search_rest'  '00instruments':1 '3083':8 'b4':13 'boosey':3,4 'classical':2 'harp':11 'hawkes':5,6 'instruments':16 'kanga':10 'moods':12 'or':15 'prerock':14 'sbh':7 'skaila':9
                                    'search_combo'  '00instruments':7 '3083':14 'b4':19 'boosey':9,10 'classical':8 'harp':5C,17 'hawkes':11,12 'instruments':22 'kanga':4B,16 'moods':6C,18 'or':21 'prerock':20 'sbh':13 'skaila':3B,15 'spinning':1A 'wheel':2A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-3', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['instrumental', 'harp', 'classical', 'folk', 'ambient']
                                        'tag_date'  1982
                                     'discogstags'  ['folk, world, & country', 'stage & screen', 'classical']

============================== file details ==============================
                                           'mtime'  1620561912.9674191  (2021-05-09 14:05:12)
                             'size'  7986158