======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '322'
                                          'artist'  'Nick Cave & the Bad Seeds'
                                     'text_people'  ''
                                         'release'  "You Can't Judge a Song By Its Cover"
                                           'title'  'Disco 2000'
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-HHRNBTT-1', 'Q-UNU-1', 'Q-LOCALNESS-1', "
 "'Q-OLDST-3', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-2', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['alternative rock', 'alternative', 'post punk', 'singer songwriter', 'rock']"
                                     'discogstags'  "['rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  '0'
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'set-cover or covered-styled;set-cover or covered'
                                             'bpm'  '105.368'
                                             'key'  '7A'
                                        'acoustid'  ''
rest: ''

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

'POPM:no@email'                                     POPM(email='no@email', rating=186, count=0)
'TALB' (Album/Movie/Show title)                     "You Can't Judge a Song By Its Cover"
'TBPM' (BPM (beats per minute))                     '105.368'
'TCON' (Content type, a.k.a. Genre)                 ['set-cover or covered-styled', 'set-cover or covered']
'TIT2' (Title/songname/content description)         'Disco 2000'
'TKEY' (Initial key)                                '7A'
'TPE1' (Lead performer(s)/Soloist(s))               'Nick Cave & the Bad Seeds'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '/0'
'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'                                  'rock'
'TXXX:lastfmtags'                                   ['alternative rock', 'alternative', 'post punk', 'singer songwriter', 'rock']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '2'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.54 dB'
'TXXX:replaygain_track_peak'                        '0.443153'

========================== row from database ==========================
                                              'id'  1522950
                                            'path'  /data/Music/Bulk/00poprockelectronic/you can_t judge a song by its cover/-00-Nick Cave & the Bad Seeds-Disco 2000.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  322
                                           'genre'  set-cover or covered-styled;set-cover or covered
                                        'filesize'  7733120
                                           'mtime'  1638540257
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic you can_t judge song by its cover set cover or covered styled;set cover or covered
                                      'tag_artist'  Nick Cave & the Bad Seeds
                                     'tag_release'  You Can't Judge a Song By Its Cover
                                       'tag_title'  Disco 2000
                                             'bpm'  105.368
                                    'search_title'  '2000':2 'disco':1
                                   'search_artist'  'bad':4 'cave':2 'nick':1 'seeds':5 'the':3
                                  'search_release'  'a':6 'by':8 'can':2 'cant':4 'cover':10 'its':9 'judge':5 'song':7 't':3 'you':1
                                     'search_rest'  '00poprockelectronic':1 'by':7 'can':3 'cover':9 'covered':12 'its':8 'judge':5 'or':11 'set':10,14,16 'song':6 'styled':13,15 't':4 'you':2
                                    'search_combo'  '00poprockelectronic':18 '2000':2A 'a':13C 'bad':6B 'by':15C,24 'can':9C,20 'cant':11C 'cave':4B 'cover':17C,26 'covered':29 'disco':1A 'its':16C,25 'judge':12C,22 'nick':3B 'or':28 'seeds':7B 'set':27,31,33 'song':14C,23 'styled':30,32 't':10C,21 'the':5B 'you':8C,19
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-2', 'q-syn-2', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['alternative rock', 'alternative', 'post punk', 'singer songwriter', 'rock']
                                        'tag_date'  
                                     'discogstags'  ['rock']

============================== file details ==============================
                                           'mtime'  1638540257.0198715  (2021-12-03 15:04:17)
                             'size'  7733120