======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '326'
                                          'artist'  'Fleetwood Mac'
                                     'text_people'  'Peter Green'
                                         'release'  "The Best of Peter Green's Fleetwood Mac [Sony]"
                                           'title'  'Albatross (2° Long v.)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['80s', 'soft rock', 'rock', 'pop', 'classic rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '20'
                                      'tracktotal'  ''
                                            'date'  '2003'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '134.9'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

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'PRIV:WM/WMCollectionGroupID:ë]\x8d¦\x8c\x86\x8eJ\x88~Ê>>\x95}e'  PRIV(owner='WM/WMCollectionGroupID', data=b'\xeb]\x8d\xa6\x8c\x86\x8eJ\x88~\xca>>\x95}e')
'PRIV:WM/WMCollectionID:ë]\x8d¦\x8c\x86\x8eJ\x88~Ê>>\x95}e'  PRIV(owner='WM/WMCollectionID', data=b'\xeb]\x8d\xa6\x8c\x86\x8eJ\x88~\xca>>\x95}e')
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'TALB' (Album/Movie/Show title)                     "The Best of Peter Green's Fleetwood Mac [Sony]"
'TBPM' (BPM (beats per minute))                     '134.9'
'TCOM' (Composer)                                   'Peter Green'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '2003'
'TIT2' (Title/songname/content description)         'Albatross (2° Long v.)'
'TKEY' (Initial key)                                '12B'
'TLEN' (Length)                                     '326613'
'TPE1' (Lead performer(s)/Soloist(s))               'Fleetwood Mac'
'TPE2' (Band/orchestra/accompaniment)               'Fleetwood Mac'
'TPUB' (Publisher)                                  'Sony International'
'TRCK' (Track number/Position in set)               '20'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-2.66 dB'
'TXXX:replaygain_track_peak'                        '0.996342'

========================== row from database ==========================
                                              'id'  1528885
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/EASY Instr 70_s/Fleetwood Mac - Albatross (2° Long v.).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  326
                                           'genre'  funk or soul
                                        'filesize'  13057740
                                           'mtime'  1628357824
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul EASY Instr 70_s funk or soul
                                      'tag_artist'  Fleetwood Mac
                                     'tag_release'  The Best of Peter Green's Fleetwood Mac [Sony]
                                       'tag_title'  Albatross (2° Long v.)
                                             'bpm'  134.9
                                    'search_title'  '2':2,3 'albatross':1 'long':4 'v':5,6
                                   'search_artist'  'fleetwood':1 'mac':2
                                  'search_release'  'best':2 'fleetwood':8 'green':5 'greens':7 'mac':9 'of':3 'peter':4 's':6 'sony':10,11 'the':1
                                     'search_rest'  '70':6 'easy':4 'funk':2 'instr':5 'or':8 's':7 'soul':3 'swing':1
                                    'search_combo'  '2':2A,3A '70':25 'albatross':1A 'best':10C 'easy':23 'fleetwood':7B,16C 'funk':21 'green':13C 'greens':15C 'instr':24 'long':4A 'mac':8B,17C 'of':11C 'or':27 'peter':12C 's':14C,26 'sony':18C,19C 'soul':22 'swing':20 'the':9C 'v':5A,6A
                                    'tag_tracknum'  20
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['80s', 'soft rock', 'rock', 'pop', 'classic rock']
                                        'tag_date'  2003
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357824.3278723  (2021-08-07 19:37:04)
                             'size'  13057740