======================== unified (from filesystem) ========================
                                         'bitrate'  '192.42'
                                        'duration'  '422'
                                          'artist'  'Zakir Hussain, Sultan Khan & Bill Laswell'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-3', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-4', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'loc-m'
                                             'bpm'  '135.004'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '135.004'
'TCON' (Content type, a.k.a. Genre)                 'loc-m'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Zakir Hussain, Sultan Khan & Bill Laswell'
'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:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.43 dB'
'TXXX:replaygain_track_peak'                        '0.933927'

========================== row from database ==========================
                                              'id'  928073
                                            'path'  /data/Music/Bulk/00localcharacter/00south-europe-middle-east/Tabla Beat Science/Zakir Hussain/Zakir Hussain, Sultan Khan & Bill Laswell/zakir hussain, sultan khan, bill laswell, et. al. - (second set) - 03.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  422
                                           'genre'  loc-m
                                        'filesize'  10153997
                                           'mtime'  1620526595
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00south europe middle east Tabla Beat Science zakir hussain, sultan khan, bill laswell, et. al. (second set) 03 loc m
                                      'tag_artist'  Zakir Hussain, Sultan Khan & Bill Laswell
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  135.004
                                    'search_title'  None
                                   'search_artist'  'bill':6 'hussain':2,3 'khan':5 'laswell':7 'sultan':4 'zakir':1
                                  'search_release'  
                                     'search_rest'  '00south':1 'al':19,20 'beat':6 'bill':14 'east':4 'et':17,18 'europe':2 'hussain':9,10 'khan':12,13 'laswell':15,16 'loc':25 'm':26 'middle':3 'science':7 'second':21,22 'set':23,24 'sultan':11 'tabla':5 'zakir':8
                                    'search_combo'  '00south':8 'al':26,27 'beat':13 'bill':6B,21 'east':11 'et':24,25 'europe':9 'hussain':2B,3B,16,17 'khan':5B,19,20 'laswell':7B,22,23 'loc':32 'm':33 'middle':10 'science':14 'second':28,29 'set':30,31 'sultan':4B,18 'tabla':12 'zakir':1B,15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-4', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620526595.0070832  (2021-05-09 04:16:35)
                             'size'  10153997