======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '288'
                                          'artist'  'The Whispers'
                                     'text_people'  ''
                                         'release'  'Just Gets Better With Time'
                                           'title'  'Rock Steady'
                                           'quals'  ("['Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-OLDST-3', "
 "'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-3', 'q-mixbeat-3']")
                                      'lastfmtags'  "['soul', 'disco', 'funk', '80s', '7soul']"
                                     'discogstags'  "['funk / soul', 'rhythm & blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '03'
                                      'tracktotal'  ''
                                            'date'  '1987'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance;funk or soul;set-pl-billboard'
                                             'bpm'  '116.453'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Just Gets Better With Time'
'TBPM' (BPM (beats per minute))                     '116.453'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-generic or radio-dance', 'funk or soul', 'set-pl-billboard']
'TDRC' (Recording time)                             '1987'
'TIT2' (Title/songname/content description)         'Rock Steady'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Whispers'
'TRCK' (Track number/Position in set)               '03'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['funk / soul', 'rhythm & blues']
'TXXX:lastfmtags'                                   ['soul', 'disco', 'funk', '80s', '7soul']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+1.12 dB'
'TXXX:replaygain_track_peak'                        '0.687676'

========================== row from database ==========================
                                              'id'  1339039
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/03 - Rock Steady.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  288
                                           'genre'  electronic-generic or radio-dance;funk or soul;set-pl-billboard
                                        'filesize'  11715466
                                           'mtime'  1620385380
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set 03 electronic generic or radio dance;funk or soul;set pl billboard
                                      'tag_artist'  The Whispers
                                     'tag_release'  Just Gets Better With Time
                                       'tag_title'  Rock Steady
                                             'bpm'  116.453
                                    'search_title'  'rock':1 'steady':2
                                   'search_artist'  'the':1 'whispers':2
                                  'search_release'  'better':3 'gets':2 'just':1 'time':5 'with':4
                                     'search_rest'  '00poprockelectronic':1 'billboard':16 'dance':7,9 'electronic':3 'funk':8,10 'generic':4 'or':5 'pl':15 'radio':6 'set':2,12,14 'soul':11,13
                                    'search_combo'  '00poprockelectronic':10 'better':7C 'billboard':25 'dance':16,18 'electronic':12 'funk':17,19 'generic':13 'gets':6C 'just':5C 'or':14 'pl':24 'radio':15 'rock':1A 'set':11,21,23 'soul':20,22 'steady':2A 'the':3B 'time':9C 'whispers':4B 'with':8C
                                    'tag_tracknum'  3
                                      'num_images'  1
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-1', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['soul', 'disco', 'funk', '80s', '7soul']
                                        'tag_date'  1987
                                     'discogstags'  ['funk / soul', 'rhythm & blues']

============================== file details ==============================
                                           'mtime'  1620385380.08322  (2021-05-07 13:03:00)
                             'size'  11715466