======================== unified (from filesystem) ========================
                                         'bitrate'  '320.01'
                                        'duration'  '240'
                                          'artist'  'The Bee Gees'
                                     'text_people'  ''
                                         'release'  '100 Oldies Deel 34'
                                           'title'  'How Can You Mend A Broken Heart'
                                           'quals'  ("['Q-JZFKS-1', 'Q-UNU-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'Q-OLDST-3', 'q-chart-3', 'q-drums-2', 'q-other-3', 'q-piano-1', "
 "'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-2', 'Q-LOCALNESS-1']")
                                      'lastfmtags'  "['disco', 'pop', '70s', 'classic rock', 'british artist']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '39'
                                      'tracktotal'  '100'
                                            'date'  '1989'
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-unsorted'
                                             'bpm'  '139.948'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

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'TALB' (Album/Movie/Show title)                     '100 Oldies Deel 34'
'TBPM' (BPM (beats per minute))                     '139.948'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-unsorted'
'TDRC' (Recording time)                             '1989'
'TENC' (Encoded by)                                 'Mister X'
'TIT2' (Title/songname/content description)         'How Can You Mend A Broken Heart'
'TKEY' (Initial key)                                '1B'
'TLEN' (Length)                                     '240953'
'TPE1' (Lead performer(s)/Soloist(s))               'The Bee Gees'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '39/100'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['disco', 'pop', '70s', 'classic rock', 'british artist']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.24 dB'
'TXXX:replaygain_track_peak'                        '0.630017'

========================== row from database ==========================
                                              'id'  1338653
                                            'path'  /data/Music/Bulk/00poprockelectronic/100 oldies deel 35/39 The Bee Gees - How Can You Mend A Broken Heart.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  240
                                           'genre'  electronic-generic or radio-unsorted
                                        'filesize'  10142303
                                           'mtime'  1620565254
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic oldies deel 35 39 electronic generic or radio unsorted
                                      'tag_artist'  The Bee Gees
                                     'tag_release'  100 Oldies Deel 34
                                       'tag_title'  How Can You Mend A Broken Heart
                                             'bpm'  139.948
                                    'search_title'  'a':5 'broken':6 'can':2 'heart':7 'how':1 'mend':4 'you':3
                                   'search_artist'  'bee':2 'gees':3 'the':1
                                  'search_release'  '100':1 '34':4 'deel':3 'oldies':2
                                     'search_rest'  '00poprockelectronic':1 '35':4 '39':5 'deel':3 'electronic':6 'generic':7 'oldies':2 'or':8 'radio':9 'unsorted':10
                                    'search_combo'  '00poprockelectronic':15 '100':11C '34':14C '35':18 '39':19 'a':5A 'bee':9B 'broken':6A 'can':2A 'deel':13C,17 'electronic':20 'gees':10B 'generic':21 'heart':7A 'how':1A 'mend':4A 'oldies':12C,16 'or':22 'radio':23 'the':8B 'unsorted':24 'you':3A
                                    'tag_tracknum'  39
                                      'num_images'  1
                                             'key'  1B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-3', 'q-other-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['disco', 'pop', '70s', 'classic rock', 'british artist']
                                        'tag_date'  1989
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620565254.4382274  (2021-05-09 15:00:54)
                             'size'  10142303