======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '240'
                                          'artist'  'Prodigy'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Breathe (Edit)'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-2', 'Q-UNU-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-4', 'q-play-3', "
 "'q-chart-3', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['rave', 'electronic', 'hip hop', 'big beat', 'rap']"
                                     'discogstags'  "['hip hop']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1995'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-bigbeat'
                                             'bpm'  '129.979'
                                             'key'  '2A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '129.979'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-bigbeat'
'TDRC' (Recording time)                             '1995'
'TIT2' (Title/songname/content description)         'Breathe (Edit)'
'TKEY' (Initial key)                                '2A'
'TPE1' (Lead performer(s)/Soloist(s))               'Prodigy'
'TXXX:Mp3gain_minmax'                               '000,189'
'TXXX:Mp3gain_undo'                                 '+007,+007,N'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '2'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:Tracknum'                                     '01'
'TXXX:discogstags'                                  'hip hop'
'TXXX:lastfmtags'                                   ['rave', 'electronic', 'hip hop', 'big beat', 'rap']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '4'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.99 dB'
'TXXX:replaygain_track_peak'                        '0.420289'

========================== row from database ==========================
                                              'id'  1326465
                                            'path'  /data/Music/Bulk/00poprockelectronic/Prodigy/The Rest, The Unreleased, The Last/Prodigy - Breathe (Edit) - 01.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  240
                                           'genre'  electronic-generic or radio-bigbeat
                                        'filesize'  3850148
                                           'mtime'  1620665635
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic The Rest, The Unreleased, The Last 01 electronic generic or radio bigbeat
                                      'tag_artist'  Prodigy
                                     'tag_release'  None
                                       'tag_title'  Breathe (Edit)
                                             'bpm'  129.979
                                    'search_title'  'breathe':1 'edit':2,3
                                   'search_artist'  'prodigy':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 'bigbeat':12 'electronic':8 'generic':9 'last':7 'or':10 'radio':11 'rest':3,4 'the':2 'unreleased':5,6
                                    'search_combo'  '00poprockelectronic':5 'bigbeat':16 'breathe':1A 'edit':2A,3A 'electronic':12 'generic':13 'last':11 'or':14 'prodigy':4B 'radio':15 'rest':7,8 'the':6 'unreleased':9,10
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  2A
                                           'quals'  ['Q-HHRNBTT-2', '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-4', 'q-syn-2', 'q-chart-3', 'q-other-1', 'Q-HAP-2', 'q-bass-4', 'q-grit-4']
                                      'lastfmtags'  ['rave', 'electronic', 'hip hop', 'big beat', 'rap']
                                        'tag_date'  1995
                                     'discogstags'  ['hip hop']

============================== file details ==============================
                                           'mtime'  1620665634.7876213  (2021-05-10 18:53:54)
                             'size'  3850148