======================== unified (from filesystem) ========================
                                         'bitrate'  '177.888'
                                        'duration'  '260'
                                          'artist'  'Grand Funk Railroad'
                                     'text_people'  ''
                                         'release'  'Grand Funk'
                                           'title'  "Please Don't Worry"
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-JZFKS-4', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues rock', '70s', 'rock', 'hard rock', 'funk', 'classic rock']"
                                     'discogstags'  "['rock', 'funk / soul', 'rock & roll', 'funk']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'funk or soul-funk'
                                             'bpm'  '134.288'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Grand Funk'
'TBPM' (BPM (beats per minute))                     '134.288'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul-funk'
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         "Please Don't Worry"
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Grand Funk Railroad'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '4'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'funk / soul', 'rock & roll', 'funk']
'TXXX:lastfmtags'                                   ['blues rock', '70s', 'rock', 'hard rock', 'funk', 'classic rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.72 dB'
'TXXX:replaygain_track_peak'                        '0.694945'

========================== row from database ==========================
                                              'id'  1508991
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/Grand Funk Railroad/[1970] Grand Funk/Grand Funk Railroad - Please Don_t Worry - 02.mp3
                                         'working'  None
                                         'bitrate'  177
                                    'duration_sec'  260
                                           'genre'  funk or soul-funk
                                        'filesize'  5804304
                                           'mtime'  1620665641
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul [1970] Don_t 02 funk soul funk
                                      'tag_artist'  Grand Funk Railroad
                                     'tag_release'  Grand Funk
                                       'tag_title'  Please Don't Worry
                                             'bpm'  134.288
                                    'search_title'  'don':2 'dont':4 'please':1 't':3 'worry':5
                                   'search_artist'  'funk':2 'grand':1 'railroad':3
                                  'search_release'  'funk':2 'grand':1
                                     'search_rest'  '1970':4,5 'don':6 'funk':2 'soul':3 'swing':1 't':7
                                    'search_combo'  '1970':14,15 'don':2A,16 'dont':4A 'funk':7B,10C,12 'grand':6B,9C 'please':1A 'railroad':8B 'soul':13 'swing':11 't':3A,17 'worry':5A
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-4', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['blues rock', '70s', 'rock', 'hard rock', 'funk', 'classic rock']
                                        'tag_date'  2000
                                     'discogstags'  ['rock', 'funk / soul', 'rock & roll', 'funk']

============================== file details ==============================
                                           'mtime'  1620665640.9201043  (2021-05-10 18:54:00)
                             'size'  5804304