======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '386'
                                          'artist'  'Underworld'
                                     'text_people'  ''
                                         'release'  'Dirty Epic / Cowgirl (US CD-S)'
                                           'title'  'River of Bass'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'q-syn-4', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-4', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-3']")
                                      'lastfmtags'  "['electronica', 'dance', 'techno', 'electronic', 'trance']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '0'
                                      'tracktotal'  ''
                                            'date'  '2000'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno;electronic-th-trance'
                                             'bpm'  '134.3'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Dirty Epic / Cowgirl (US CD-S)'
'TBPM' (BPM (beats per minute))                     '134.3'
'TCON' (Content type, a.k.a. Genre)                 ['electronic-th-techno', 'electronic-th-trance']
'TDRC' (Recording time)                             '2000'
'TIT2' (Title/songname/content description)         'River of Bass'
'TKEY' (Initial key)                                '6B'
'TLEN' (Length)                                     '386000'
'TPE1' (Lead performer(s)/Soloist(s))               'Underworld'
'TRCK' (Track number/Position in set)               '0'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['electronica', 'dance', 'techno', 'electronic', 'trance']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+1.14 dB'
'TXXX:replaygain_track_peak'                        '0.960977'

========================== row from database ==========================
                                              'id'  1308019
                                            'path'  /data/Music/Bulk/00poprockelectronic/Underworld/Dubnobasswithmyheadman/Underworld - River of Bass - 08.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  386
                                           'genre'  electronic-th-techno;electronic-th-trance
                                        'filesize'  6188928
                                           'mtime'  1620572460
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Dubnobasswithmyheadman 08 electronic th techno;electronic th trance
                                      'tag_artist'  Underworld
                                     'tag_release'  Dirty Epic / Cowgirl (US CD-S)
                                       'tag_title'  River of Bass
                                             'bpm'  134.3
                                    'search_title'  'bass':3 'of':2 'river':1
                                   'search_artist'  'underworld':1
                                  'search_release'  'cd':6 'cds':8 'cowgirl':3 'dirty':1 'epic':2 's':7 'us':4,5
                                     'search_rest'  '00poprockelectronic':1 'dubnobasswithmyheadman':2 'electronic':3,6,8 'techno':5,7 'th':4 'trance':9
                                    'search_combo'  '00poprockelectronic':13 'bass':3A 'cd':10C 'cds':12C 'cowgirl':7C 'dirty':5C 'dubnobasswithmyheadman':14 'electronic':15,18,20 'epic':6C 'of':2A 'river':1A 's':11C 'techno':17,19 'th':16 'trance':21 'underworld':4B 'us':8C,9C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-4', 'q-chart-4', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'dance', 'techno', 'electronic', 'trance']
                                        'tag_date'  2000
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620572460.0169866  (2021-05-09 17:01:00)
                             'size'  6188928