======================== unified (from filesystem) ========================
                                         'bitrate'  '216.244'
                                        'duration'  '284'
                                          'artist'  'Bruce Haack'
                                     'text_people'  ''
                                         'release'  'Farad: The Electric Voice 2LP'
                                           'title'  'Rain Of Earth'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  "['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '5'
                                      'tracktotal'  ''
                                            'date'  '2010'
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '87.7'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Farad: The Electric Voice 2LP'
'TBPM' (BPM (beats per minute))                     '87.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TDRC' (Recording time)                             '2010'
'TENC' (Encoded by)                                 'Lame 3.97'
'TIT2' (Title/songname/content description)         'Rain Of Earth'
'TKEY' (Initial key)                                '9B'
'TLAN' (Language(s))                                'English'
'TPE1' (Lead performer(s)/Soloist(s))               'Bruce Haack'
'TRCK' (Track number/Position in set)               '5'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.64 dB'
'TXXX:replaygain_track_peak'                        '0.436005'

========================== row from database ==========================
                                              'id'  918804
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Bruce Haack/2010 - Bruce Haack - Farad： The Electric Voice (Stones Throw) 2LP [vBr]/05-bruce_haack-rain_of_earth.mp3
                                         'working'  None
                                         'bitrate'  216
                                    'duration_sec'  284
                                           'genre'  electronic-experimental
                                        'filesize'  7701047
                                           'mtime'  1622801505
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 2010 Farad： (Stones Throw) [vBr] 05 bruce_haack rain_of_earth electronic experimental
                                      'tag_artist'  Bruce Haack
                                     'tag_release'  Farad: The Electric Voice 2LP
                                       'tag_title'  Rain Of Earth
                                             'bpm'  87.7
                                    'search_title'  'earth':3 'of':2 'rain':1
                                   'search_artist'  'bruce':1 'haack':2
                                  'search_release'  '2lp':6 'electric':4 'farad':1,2 'the':3 'voice':5
                                     'search_rest'  '2010':1 'br':20,21 'bruce':11 'earth':15 'electronic':16 'experimental':17 'farad':2,3,4 'haack':12 'of':14 'rain':13 'stones':5,6 'throw':7,8 'v':18,19 'vbr':9,10
                                    'search_combo'  '2010':12 '2lp':11C 'br':31,32 'bruce':4B,22 'earth':3A,26 'electric':9C 'electronic':27 'experimental':28 'farad':6C,7C,13,14,15 'haack':5B,23 'of':2A,25 'rain':1A,24 'stones':16,17 'the':8C 'throw':18,19 'v':29,30 'vbr':20,21 'voice':10C
                                    'tag_tracknum'  5
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-3', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'space age pop', 'electronic', 'psychedelic', 'experimental']
                                        'tag_date'  2010
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1622801505.1368196  (2021-06-04 12:11:45)
                             'size'  7701047