======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '286'
                                          'artist'  'Fantastic Plastic Machine'
                                     'text_people'  ''
                                         'release'  'the fantastic plastic machine'
                                           'title'  'bachelor pad (f.p.m. edit)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-2', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-1', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-2', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '04'
                                      'tracktotal'  ''
                                            'date'  '1998'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa;loc-asia-japan'
                                             'bpm'  '108.1'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'the fantastic plastic machine'
'TBPM' (BPM (beats per minute))                     '108.1'
'TCON' (Content type, a.k.a. Genre)                 ['prerock-jb-jazz-lounge or exotica or bossa', 'loc-asia-japan']
'TDRC' (Recording time)                             '1998'
'TIT2' (Title/songname/content description)         'bachelor pad (f.p.m. edit)'
'TKEY' (Initial key)                                '3A'
'TLEN' (Length)                                     '286302'
'TPE1' (Lead performer(s)/Soloist(s))               'Fantastic Plastic Machine'
'TRCK' (Track number/Position in set)               '04'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '-0.61 dB'
'TXXX:replaygain_track_peak'                        '0.426430'

========================== row from database ==========================
                                              'id'  1367600
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Fantastic Plastic Machine - 1998 - The Fantastic Plastic Machine (Nippon Columbia) [128k]/[04] bachelor pad (f.p.m. edit).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  286
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa;loc-asia-japan
                                        'filesize'  4583237
                                           'mtime'  1620528717
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 1998 The (Nippon Columbia) [128k] [04] prerock jb jazz lounge exotica bossa;loc asia japan
                                      'tag_artist'  Fantastic Plastic Machine
                                     'tag_release'  the fantastic plastic machine
                                       'tag_title'  bachelor pad (f.p.m. edit)
                                             'bpm'  108.1
                                    'search_title'  'bachelor':1 'edit':7,8 'f':3 'fpm':6 'm':5 'p':4 'pad':2
                                   'search_artist'  'fantastic':1 'machine':3 'plastic':2
                                  'search_release'  'fantastic':2 'machine':4 'plastic':3 'the':1
                                     'search_rest'  '04':13,14 '128k':11,12 '1998':5 'asia':22 'bossa':18,20 'columbia':9,10 'country':4 'exotica':2 'japan':23 'jazz':1 'jb':16 'loc':19,21 'lounge':17 'nippon':7,8 'oldies':3 'prerock':15 'the':6
                                    'search_combo'  '04':28,29 '128k':26,27 '1998':20 'asia':37 'bachelor':1A 'bossa':33,35 'columbia':24,25 'country':19 'edit':7A,8A 'exotica':17 'f':3A 'fantastic':9B,13C 'fpm':6A 'japan':38 'jazz':16 'jb':31 'loc':34,36 'lounge':32 'm':5A 'machine':11B,15C 'nippon':22,23 'oldies':18 'p':4A 'pad':2A 'plastic':10B,14C 'prerock':30 'the':12C,21
                                    'tag_tracknum'  4
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-2', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-1']
                                      'lastfmtags'  ['lounge', 'shibuya kei', 'electronica', 'electronic', 'japanese']
                                        'tag_date'  1998
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620528717.3921711  (2021-05-09 04:51:57)
                             'size'  4583237