======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '274'
                                          'artist'  'the california playboys'
                                     'text_people'  ''
                                         'release'  "kent 166 - stone soul sanfraciso's loadstone label"
                                           'title'  'just say a four letter word (love)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-2', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '118.915'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'TALB' (Album/Movie/Show title)                     "kent 166 - stone soul sanfraciso's loadstone label"
'TBPM' (BPM (beats per minute))                     '118.915'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'just say a four letter word (love)'
'TKEY' (Initial key)                                '10B'
'TPE1' (Lead performer(s)/Soloist(s))               'the california playboys'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '-0.20 dB'
'TXXX:replaygain_track_peak'                        '0.600283'
'TXXX:tracknum'                                     '03'

========================== row from database ==========================
                                              'id'  1530465
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Various Artists - Stone Soul-San Francisco_s Loadstone Label [Kent 166] [@320]/03 - the california playboys - just say a four letter word (love).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  274
                                           'genre'  funk or soul
                                        'filesize'  10996564
                                           'mtime'  1628357672
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk Various Artists Stone Soul San Francisco_s Loadstone Label [Kent 166] [@320] 03 funk
                                      'tag_artist'  the california playboys
                                     'tag_release'  kent 166 - stone soul sanfraciso's loadstone label
                                       'tag_title'  just say a four letter word (love)
                                             'bpm'  118.915
                                    'search_title'  'a':3 'four':4 'just':1 'letter':5 'love':7,8 'say':2 'word':6
                                   'search_artist'  'california':2 'playboys':3 'the':1
                                  'search_release'  '166':2 'kent':1 'label':9 'loadstone':8 's':6 'sanfraciso':5 'sanfracisos':7 'soul':4 'stone':3
                                     'search_rest'  '166':14,15 '320':16,17 'artists':4 'francisco':8 'funk':2 'kent':12,13 'label':11 'loadstone':10 's':9 'san':7 'soul':6 'stone':5 'swing':1 'various':3
                                    'search_combo'  '166':13C,34,35 '320':36,37 'a':3A 'artists':24 'california':10B 'four':4A 'francisco':28 'funk':22 'just':1A 'kent':12C,32,33 'label':20C,31 'letter':5A 'loadstone':19C,30 'love':7A,8A 'playboys':11B 's':17C,29 'san':27 'sanfraciso':16C 'sanfracisos':18C 'say':2A 'soul':15C,26 'stone':14C,25 'swing':21 'the':9B 'various':23 'word':6A
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  10B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-4', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-2', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357672.1173167  (2021-08-07 19:34:32)
                             'size'  10996564