======================== unified (from filesystem) ========================
                                         'bitrate'  '319.725'
                                        'duration'  '145'
                                          'artist'  'Carl Perkins'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Pink Pedal Pushers'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-2', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'country', '50s']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1958'
                                        'comments'  ''
                                           'genre'  'rock-pop-early-rockabilly'
                                             'bpm'  '146.000'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '58-483 POS 91'
'COMM:ID3v1 Comment:XXX'                            '58-483 POS 91'
'TBPM' (BPM (beats per minute))                     '146.000'
'TCON' (Content type, a.k.a. Genre)                 'rock-pop-early-rockabilly'
'TDRC' (Recording time)                             '1958'
'TIT2' (Title/songname/content description)         'Pink Pedal Pushers'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Carl Perkins'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'country', '50s']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+19.94 dB'
'TXXX:replaygain_track_peak'                        '0.045998'

========================== row from database ==========================
                                              'id'  1427798
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1958/58-483 - Carl Perkins - Pink Pedal Pushers.mp3
                                         'working'  None
                                         'bitrate'  319
                                    'duration_sec'  145
                                           'genre'  rock-pop-early-rockabilly
                                        'filesize'  5810824
                                           'mtime'  1622659480
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1958 58 483 rock pop early rockabilly
                                      'tag_artist'  Carl Perkins
                                     'tag_release'  None
                                       'tag_title'  Pink Pedal Pushers
                                             'bpm'  146.0
                                    'search_title'  'pedal':2 'pink':1 'pushers':3
                                   'search_artist'  'carl':1 'perkins':2
                                  'search_release'  
                                     'search_rest'  '00oldiepop':5 '1958':6 '483':8 '58':7 'country':4 'early':11 'exotica':2 'jazz':1 'oldies':3 'pop':10 'rock':9 'rockabilly':12
                                    'search_combo'  '00oldiepop':10 '1958':11 '483':13 '58':12 'carl':4B 'country':9 'early':16 'exotica':7 'jazz':6 'oldies':8 'pedal':2A 'perkins':5B 'pink':1A 'pop':15 'pushers':3A 'rock':14 'rockabilly':17
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           '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-1', 'q-busy-3', 'q-drums-2', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['oldies', 'rock n roll', 'rock and roll', 'rockabilly', 'country', '50s']
                                        'tag_date'  1958
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1622659479.8441567  (2021-06-02 20:44:39)
                             'size'  5810824