======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '444'
                                          'artist'  'Metallica'
                                     'text_people'  ''
                                         'release'  'The Greatest Hits 2009'
                                           'title'  'One'
                                           'quals'  ("['Q-HAP-1', 'Q-LOCALNESS-1', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', "
 "'Q-HHRNBTT-1', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-4', 'q-play-2', "
 "'q-chart-4', 'q-drums-4', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'eid-unsorted;set-pl-shirleyspinoza;set-pl-mor'
                                             'bpm'  '111.149'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'The Greatest Hits 2009'
'TBPM' (BPM (beats per minute))                     '111.149'
'TCON' (Content type, a.k.a. Genre)                 ['eid-unsorted', 'set-pl-shirleyspinoza', 'set-pl-mor']
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'One'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Metallica'
'TRCK' (Track number/Position in set)               '1'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME v3.98 (beta 6, Jan 22 2008)'
'TXXX:Q-HAP'                                        '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:lastfmtags'                                   ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.37 dB'
'TXXX:replaygain_track_peak'                        '0.392602'

========================== row from database ==========================
                                              'id'  1333944
                                            'path'  /data/Music/Bulk/00poprockelectronic/90s/028 - Metallica - One.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  444
                                           'genre'  eid-unsorted;set-pl-shirleyspinoza;set-pl-mor
                                        'filesize'  17801842
                                           'mtime'  1620521201
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic 90s 028 eid unsorted;set pl shirleyspinoza;set pl mor
                                      'tag_artist'  Metallica
                                     'tag_release'  The Greatest Hits 2009
                                       'tag_title'  One
                                             'bpm'  111.149
                                    'search_title'  'one':1
                                   'search_artist'  'metallica':1
                                  'search_release'  '2009':4 'greatest':2 'hits':3 'the':1
                                     'search_rest'  '00poprockelectronic':1 '90s':2 'eid':3 'mor':13 'pl':8 'set':5,7,10,12 'shirleyspinoza':9,11 'unsorted':4,6
                                    'search_combo'  '00poprockelectronic':7 '2009':6C '90s':8 'eid':9 'greatest':4C 'hits':5C 'metallica':2B 'mor':19 'one':1A 'pl':14 'set':11,13,16,18 'shirleyspinoza':15,17 'the':3C 'unsorted':10,12
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', '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-4', 'q-other-4', 'Q-HAP-1', 'q-bass-1', 'q-grit-4']
                                      'lastfmtags'  ['hard rock', 'rock', 'thrash metal', 'metal', 'heavy metal']
                                        'tag_date'  1995
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620521201.297255  (2021-05-09 02:46:41)
                             'size'  17801842