======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '133'
                                          'artist'  '101-Strings Orchestra'
                                     'text_people'  ''
                                         'release'  "Music for swingin' lovers"
                                           'title'  'Friendly persuasion'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', "
 "'Q-UNU-1', 'Q-SYN-1', 'Q-BUSY-3', 'Q-GRIT-1', 'q-bass-1', 'q-play-2', "
 "'Q-CHART-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'Q-MIXBEAT-1']")
                                      'lastfmtags'  "['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '10'
                                      'tracktotal'  ''
                                            'date'  '1993'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-easy listening'
                                             'bpm'  '117.7'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     "Music for swingin' lovers"
'TBPM' (BPM (beats per minute))                     '117.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-easy listening'
'TDRC' (Recording time)                             '1993'
'TIT2' (Title/songname/content description)         'Friendly persuasion'
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               '101-Strings Orchestra'
'TRCK' (Track number/Position in set)               '10'
'TXXX:Q-BUSY'                                       '3'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '1'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+2.67 dB'
'TXXX:replaygain_track_peak'                        '0.444988'

========================== row from database ==========================
                                              'id'  1532398
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/The 101 Strings Orchestra/1993 - Music for Swingin_ Lovers/10 - Friendly Persuasion.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  133
                                           'genre'  electronic-generic or radio-easy listening
                                        'filesize'  5361287
                                           'mtime'  1621705555
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country The 1993 Swingin_ Lovers Persuasion electronic generic radio easy listening
                                      'tag_artist'  101-Strings Orchestra
                                     'tag_release'  Music for swingin' lovers
                                       'tag_title'  Friendly persuasion
                                             'bpm'  117.7
                                    'search_title'  'friendly':1 'persuasion':2
                                   'search_artist'  '101':1 '101strings':3 'orchestra':4 'strings':2
                                  'search_release'  'for':2 'lovers':5 'music':1 'swingin':3,4
                                     'search_rest'  '1993':6 'country':4 'easy':13 'electronic':10 'exotica':2 'generic':11 'jazz':1 'listening':14 'lovers':8 'oldies':3 'persuasion':9 'radio':12 'swingin':7 'the':5
                                    'search_combo'  '101':3B '101strings':5B '1993':17 'country':15 'easy':24 'electronic':21 'exotica':13 'for':8C 'friendly':1A 'generic':22 'jazz':12 'listening':25 'lovers':11C,19 'music':7C 'oldies':14 'orchestra':6B 'persuasion':2A,20 'radio':23 'strings':4B 'swingin':9C,10C,18 'the':16
                                    'tag_tracknum'  10
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-1', 'q-play-2', 'Q-OLDST-3', 'Q-GRIT-1', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-CHART-2', 'q-drums-1', 'Q-SYN-1', 'q-other-4', 'Q-BUSY-3', 'Q-HAP-3', 'q-bass-1']
                                      'lastfmtags'  ['instrumental', 'easy listening', 'classical', 'edhits', 'myhits']
                                        'tag_date'  1993
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705554.7432857  (2021-05-22 19:45:54)
                             'size'  5361287