======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '77'
                                          'artist'  'jeff mills'
                                     'text_people'  ''
                                         'release'  'preview'
                                           'title'  'learning sequence'
                                           'quals'  ("['Q-HAP-2', 'Q-UNU-1', 'Q-HHRNBTT-1', 'Q-JZFKS-1', 'Q-OLDST-3', "
 "'Q-LOCALNESS-1', 'Q-PLAY-2', 'q-syn-4', 'q-bass-1', 'q-busy-3', 'q-grit-2', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-vocals-3', 'q-mixbeat-4', "
 "'Q-PIANO-2']")
                                      'lastfmtags'  "['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '2'
                                      'tracktotal'  ''
                                            'date'  '1999'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno'
                                             'bpm'  '103.642'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'preview'
'TBPM' (BPM (beats per minute))                     '103.642'
'TCMP'                                              '0'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno'
'TDRC' (Recording time)                             '1999'
'TIT2' (Title/songname/content description)         'learning sequence'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'jeff mills'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TPOS' (Part of a set)                              '0/0'
'TRCK' (Track number/Position in set)               '2'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-PIANO'                                      '2'
'TXXX:Q-PLAY'                                       '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '4'
'TXXX:q-other'                                      '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+2.83 dB'
'TXXX:replaygain_track_peak'                        '0.613563'

========================== row from database ==========================
                                              'id'  1334339
                                            'path'  /data/Music/Bulk/00poprockelectronic/Jeff Mills/mills, jeff - preview/jeff mills - preview - 02 - learning sequence.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  77
                                           'genre'  electronic-th-techno
                                        'filesize'  1557127
                                           'mtime'  1620570222
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic Jeff Mills mills, 02 electronic th techno
                                      'tag_artist'  jeff mills
                                     'tag_release'  preview
                                       'tag_title'  learning sequence
                                             'bpm'  103.642
                                    'search_title'  'learning':1 'sequence':2
                                   'search_artist'  'jeff':1 'mills':2
                                  'search_release'  'preview':1
                                     'search_rest'  '00poprockelectronic':1 'electronic':5 'jeff':2 'mills':3,4 'techno':7 'th':6
                                    'search_combo'  '00poprockelectronic':6 'electronic':10 'jeff':3B,7 'learning':1A 'mills':4B,8,9 'preview':5C 'sequence':2A 'techno':12 'th':11
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-1', 'q-mixbeat-4', 'Q-PIANO-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-3', 'q-syn-4', 'q-chart-2', 'q-other-3', 'Q-HAP-2', 'Q-PLAY-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['detroit techno', 'techno', 'electronic', 'detroit', 'minimal']
                                        'tag_date'  1999
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620570222.4335754  (2021-05-09 16:23:42)
                             'size'  1557127