======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '179'
                                          'artist'  'Mills Brothers'
                                     'text_people'  ''
                                         'release'  'US-Billboard-Charts'
                                           'title'  "You Didn't Want Me When You Had Me (So Why Do You Want Me Now)"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz', 'the', 'of', 'and', 'vocal jazz']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '73'
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '119.546'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-196 POS 22'
'COMM:ID3v1 Comment:XXX'                            '54-196 POS 22'
'TALB' (Album/Movie/Show title)                     'US-Billboard-Charts'
'TBPM' (BPM (beats per minute))                     '119.546'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         "You Didn't Want Me When You Had Me (So Why Do You Want Me Now)"
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mills Brothers'
'TRCK' (Track number/Position in set)               '73'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['jazz', 'the', 'of', 'and', 'vocal jazz']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.72 dB'
'TXXX:replaygain_track_peak'                        '0.358184'

========================== row from database ==========================
                                              'id'  1497042
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-196 - Mills Brothers - You Didn_t Want Me When You Had Me (So Why Do You Want Me Now).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  179
                                           'genre'  prerock-swing
                                        'filesize'  7174288
                                           'mtime'  1620562483
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 196 Didn_t prerock swing
                                      'tag_artist'  Mills Brothers
                                     'tag_release'  US-Billboard-Charts
                                       'tag_title'  You Didn't Want Me When You Had Me (So Why Do You Want Me Now)
                                             'bpm'  119.546
                                    'search_title'  'didn':2 'didnt':4 'do':12 'had':8 'me':6 'now':13,14 'so':9,10 't':3 'want':5 'when':7 'why':11 'you':1
                                   'search_artist'  'brothers':2 'mills':1
                                  'search_release'  'billboard':2 'charts':3 'us':1 'usbillboardcharts':4
                                     'search_rest'  '00oldiepop':5 '1954':6 '196':8 '54':7 'country':4 'didn':9 'exotica':2 'jazz':1 'oldies':3 'prerock':11 'swing':12 't':10
                                    'search_combo'  '00oldiepop':25 '1954':26 '196':28 '54':27 'billboard':18C 'brothers':16B 'charts':19C 'country':24 'didn':2A,29 'didnt':4A 'do':12A 'exotica':22 'had':8A 'jazz':21 'me':6A 'mills':15B 'now':13A,14A 'oldies':23 'prerock':31 'so':9A,10A 'swing':32 't':3A,30 'us':17C 'usbillboardcharts':20C 'want':5A 'when':7A 'why':11A 'you':1A
                                    'tag_tracknum'  73
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['jazz', 'the', 'of', 'and', 'vocal jazz']
                                        'tag_date'  1954
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620562483.0518188  (2021-05-09 14:14:43)
                             'size'  7174288