======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '159'
                                          'artist'  'The Apartment'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', "
 "'Q-LOCALNESS-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-2']")
                                      'lastfmtags'  ("['all', 'under 2000 listeners', 'net labels music', 'netlabel', "
 "'electronic', 'experimental']")
                                     'discogstags'  "['electronic', 'ambient']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-unsorted'
                                             'bpm'  '138.7'
                                             'key'  '4A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '138.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-unsorted'
'TKEY' (Initial key)                                '4A'
'TPE1' (Lead performer(s)/Soloist(s))               'The Apartment'
'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:discogstags'                                  ['electronic', 'ambient']
'TXXX:lastfmtags'                                   ['all',
 'under 2000 listeners',
 'net labels music',
 'netlabel',
 'electronic',
 'experimental']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-0.91 dB'
'TXXX:replaygain_track_peak'                        '0.733144'

========================== row from database ==========================
                                              'id'  1532851
                                            'path'  /data/Music/Bulk/00poprockelectronic/x) MP3_s by The Apartment [128k-192k]/sexy butter.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  159
                                           'genre'  electronic-unsorted
                                        'filesize'  2550374
                                           'mtime'  1647350759
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic x) MP3_s by [128k 192k] sexy butter electronic unsorted
                                      'tag_artist'  The Apartment
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  138.7
                                    'search_title'  None
                                   'search_artist'  'apartment':2 'the':1
                                  'search_release'  
                                     'search_rest'  '00poprockelectronic':1 '128k':7,8 '192k':9,10 'butter':12 'by':6 'electronic':13 'mp3':4 's':5 'sexy':11 'unsorted':14 'x':2,3
                                    'search_combo'  '00poprockelectronic':3 '128k':9,10 '192k':11,12 'apartment':2B 'butter':14 'by':8 'electronic':15 'mp3':6 's':7 'sexy':13 'the':1B 'unsorted':16 'x':4,5
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  4A
                                           'quals'  ['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-OLDST-3', 'Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', 'q-chart-1', 'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-2']
                                      'lastfmtags'  ['all', 'under 2000 listeners', 'net labels music', 'netlabel', 'electronic', 'experimental']
                                        'tag_date'  
                                     'discogstags'  ['electronic', 'ambient']

============================== file details ==============================
                                           'mtime'  1647350759.3565829  (2022-03-15 14:25:59)
                             'size'  2550374