======================== unified (from filesystem) ========================
                                         'bitrate'  '320.011'
                                        'duration'  '261'
                                          'artist'  ''
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  "['q-bass-4', 'q-drums-2', 'q-other-3', 'q-piano-1', 'q-vocals-4']"
                                      'lastfmtags'  "['rock', 'female vocalists', 'japanese', 'j pop', 'j rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '4'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  ''
                                             'bpm'  '103.642'
                                             'key'  '5B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '103.642'
'TDRC' (Recording time)                             '2002'
'TKEY' (Initial key)                                '5B'
'TRCK' (Track number/Position in set)               '4'
'TXXX:lastfmtags'                                   ['rock', 'female vocalists', 'japanese', 'j pop', 'j rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-drums'                                      '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'

========================== row from database ==========================
                                              'id'  1497331
                                            'path'  /data/Music/Bulk/00localcharacter/00asia/Shiina Ringo & Tokyo Jihen/Shiina Ringo - album 2002.05.27 - Utite Myoli ~sono ichi~ (Utaite Myouri) [320k]/Mori-Pact Disc/____ - _hi___~_no_~ (_-pact disc) - 04 - i won_t last a day without you (with ___hikaru).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  261
                                           'genre'  
                                        'filesize'  10478875
                                           'mtime'  1620173816
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00asia Shiina Ringo & Tokyo Jihen Shiina Ringo album 2002.05.27 Utite Myoli ~sono ichi~ (Utaite Myouri) [320k] Mori Pact Disc ____ _hi___~_no_~ (_ pact disc) 04 i won_t last a day without you (with ___hikaru)
                                      'tag_artist'  None
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  103.642
                                    'search_title'  None
                                   'search_artist'  None
                                  'search_release'  
                                     'search_rest'  '00asia':1 '05':8 '2002':7 '20020527':10 '27':9 '320k':19,20 'a':31 'album':6 'day':32 'disc':23,26 'hi':24 'hikaru':37,38 'i':27 'ichi':14 'jihen':5 'last':30 'mori':21 'myoli':12 'myouri':17,18 'no':25 'pact':22 'ringo':3 'shiina':2 'sono':13 't':29 'tokyo':4 'utaite':15,16 'utite':11 'with':35,36 'without':33 'won':28 'you':34
                                    'search_combo'  '00asia':1 '05':8 '2002':7 '20020527':10 '27':9 '320k':19,20 'a':31 'album':6 'day':32 'disc':23,26 'hi':24 'hikaru':37,38 'i':27 'ichi':14 'jihen':5 'last':30 'mori':21 'myoli':12 'myouri':17,18 'no':25 'pact':22 'ringo':3 'shiina':2 'sono':13 't':29 'tokyo':4 'utaite':15,16 'utite':11 'with':35,36 'without':33 'won':28 'you':34
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  5B
                                           'quals'  ['q-vocals-4', 'q-other-3', 'q-drums-2', 'q-piano-1', 'q-bass-4']
                                      'lastfmtags'  ['rock', 'female vocalists', 'japanese', 'j pop', 'j rock']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620173815.9392865  (2021-05-05 02:16:55)
                             'size'  10478875