======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '196'
                                          'artist'  'Instrumental Magic'
                                     'text_people'  ''
                                         'release'  'Best Of 101 Strings'
                                           'title'  'Call Me Irresponsible'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', "
 "'Q-OLDST-2', 'Q-SYN-1', 'Q-BUSY-3', 'Q-GRIT-1', 'Q-PLAY-2', 'q-bass-1', "
 "'Q-CHART-2', 'q-drums-1', 'q-other-4', 'q-piano-2', 'q-vocals-1', "
 "'Q-MIXBEAT-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-easy listening'
                                             'bpm'  '129.2'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Best Of 101 Strings'
'TBPM' (BPM (beats per minute))                     '129.2'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-easy listening'
'TDRC' (Recording time)                             '2005'
'TIT2' (Title/songname/content description)         'Call Me Irresponsible'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Instrumental Magic'
'TPOS' (Part of a set)                              '2/2'
'TRCK' (Track number/Position in set)               '2'
'TSSE' (Software/Hardware and settings used for encoding)  'LAME 32bits version 3.98.4 (http://www.mp3dev.org/)'
'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'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-SYN'                                        '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.64 dB'
'TXXX:replaygain_track_peak'                        '0.681856'

========================== row from database ==========================
                                              'id'  1479394
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/2006 - Best Of 101 String. Instrumental Magic [2CD]/CD2/02 - Call Me Irresponsible.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  196
                                           'genre'  electronic-generic or radio-easy listening
                                        'filesize'  7861623
                                           'mtime'  1621705510
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 2006 String. [2CD] CD2 02 electronic generic or radio easy listening
                                      'tag_artist'  Instrumental Magic
                                     'tag_release'  Best Of 101 Strings
                                       'tag_title'  Call Me Irresponsible
                                             'bpm'  129.2
                                    'search_title'  'call':1 'irresponsible':3 'me':2
                                   'search_artist'  'instrumental':1 'magic':2
                                  'search_release'  '101':3 'best':1 'of':2 'strings':4
                                     'search_rest'  '2006':5 '2cd':8,9 'cd2':10 'country':4 'easy':15 'electronic':11 'exotica':2 'generic':12 'jazz':1 'listening':16 'oldies':3 'or':13 'radio':14 'string':6,7
                                    'search_combo'  '101':8C '2006':14 '2cd':17,18 'best':6C 'call':1A 'cd2':19 'country':13 'easy':24 'electronic':20 'exotica':11 'generic':21 'instrumental':4B 'irresponsible':3A 'jazz':10 'listening':25 'magic':5B 'me':2A 'of':7C 'oldies':12 'or':22 'radio':23 'string':15,16 'strings':9C
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-2', 'Q-MIXBEAT-1', 'Q-OLDST-2', '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-PLAY-2', 'q-bass-1']
                                      'lastfmtags'  []
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621705510.2954118  (2021-05-22 19:45:10)
                             'size'  7861623