======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '210'
                                          'artist'  'Wu Wen Guang'
                                     'text_people'  ''
                                         'release'  'Tellus #19: New Music China'
                                           'title'  '"Liu Shui" ("Flowing Water") for guqin'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', 'Q-OLDST-3', "
 "'Q-UNU-3', 'q-syn-2', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-2', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '16'
                                      'tracktotal'  ''
                                            'date'  '1988'
                                        'comments'  ''
                                           'genre'  'electronic-experimental-oddness'
                                             'bpm'  '139.7'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Tellus #19: New Music China'
'TBPM' (BPM (beats per minute))                     '139.7'
'TCMP'                                              '1'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental-oddness'
'TDRC' (Recording time)                             '1988'
'TIT2' (Title/songname/content description)         '"Liu Shui" ("Flowing Water") for guqin'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Wu Wen Guang'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '16'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '3'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.34 dB'
'TXXX:replaygain_track_peak'                        '0.627635'

========================== row from database ==========================
                                              'id'  280451
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Tellus Audio Cassette Magazine/1988 - Tellus #19 - New Music China/16 - Wu Wen Guang - Liu Shui (Flowing Water) for guqin.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  210
                                           'genre'  electronic-experimental-oddness
                                        'filesize'  5067356
                                           'mtime'  1636915927
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm Audio Cassette Magazine 1988 16 (Flowing Water) electronic experimental oddness
                                      'tag_artist'  Wu Wen Guang
                                     'tag_release'  Tellus #19: New Music China
                                       'tag_title'  "Liu Shui" ("Flowing Water") for guqin
                                             'bpm'  139.7
                                    'search_title'  'flowing':3,4 'for':7 'guqin':8 'liu':1 'shui':2 'water':5,6
                                   'search_artist'  'guang':3 'wen':2 'wu':1
                                  'search_release'  '19':2,3 'china':6 'music':5 'new':4 'tellus':1
                                     'search_rest'  '1988':4 'audio':1 'cassette':2 'electronic':9 'experimental':10 'flowing':5,6 'magazine':3 'oddness':11 'water':7,8
                                    'search_combo'  '19':13C,14C '1988':21 'audio':18 'cassette':19 'china':17C 'electronic':26 'experimental':27 'flowing':3A,4A,22,23 'for':7A 'guang':11B 'guqin':8A 'liu':1A 'magazine':20 'music':16C 'new':15C 'oddness':28 'shui':2A 'tellus':12C 'water':5A,6A,24,25 'wen':10B 'wu':9B
                                    'tag_tracknum'  16
                                      'num_images'  1
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-4', 'Q-HAP-2', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1988
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636915927.12404  (2021-11-14 19:52:07)
                             'size'  5067356