======================== unified (from filesystem) ========================
                                         'bitrate'  '320.011'
                                        'duration'  '320'
                                          'artist'  'Green Velvet'
                                     'text_people'  ''
                                         'release'  'La La Land Remixes (CAJ300)'
                                           'title'  'La La Land (Original Remastered)'
                                           'quals'  ("['Q-HHRNBTT-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-OLDST-3', 'Q-UNU-1', "
 "'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', 'q-chart-3', "
 "'q-drums-4', 'q-other-1', 'q-piano-1', 'q-vocals-2', 'q-mixbeat-3']")
                                      'lastfmtags'  "['electronica', 'house', 'techno', 'electronic', 'electro']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '1'
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-generic or radio-dance'
                                             'bpm'  '127.524'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'La La Land Remixes (CAJ300)'
'TBPM' (BPM (beats per minute))                     '127.524'
'TCON' (Content type, a.k.a. Genre)                 'electronic-generic or radio-dance'
'TIT2' (Title/songname/content description)         'La La Land (Original Remastered)'
'TKEY' (Initial key)                                '8A'
'TPE1' (Lead performer(s)/Soloist(s))               'Green Velvet'
'TRCK' (Track number/Position in set)               '1'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronica', 'house', 'techno', 'electronic', 'electro']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '3'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '3'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '2'
'TXXX:replaygain_track_gain'                        '-1.77 dB'
'TXXX:replaygain_track_peak'                        '0.478638'

========================== row from database ==========================
                                              'id'  1340252
                                            'path'  /data/Music/Bulk/00poprockelectronic/set/01-green_velvet_-_la_la_land.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  320
                                           'genre'  electronic-generic or radio-dance
                                        'filesize'  12830294
                                           'mtime'  1620573835
                                   'redo_metaread'  0
                                        'rest_str'   00poprockelectronic set 01 green_velvet_ _la_la_land electronic generic or radio dance
                                      'tag_artist'  Green Velvet
                                     'tag_release'  La La Land Remixes (CAJ300)
                                       'tag_title'  La La Land (Original Remastered)
                                             'bpm'  127.524
                                    'search_title'  'la':1 'land':2 'original':3,4 'remastered':5,6
                                   'search_artist'  'green':1 'velvet':2
                                  'search_release'  'caj300':4,5 'la':1 'land':2 'remixes':3
                                     'search_rest'  '00poprockelectronic':1 'dance':12 'electronic':8 'generic':9 'green':3 'la':5,6 'land':7 'or':10 'radio':11 'set':2 'velvet':4
                                    'search_combo'  '00poprockelectronic':14 'caj300':12C,13C 'dance':25 'electronic':21 'generic':22 'green':7B,16 'la':1A,9C,18,19 'land':2A,10C,20 'or':23 'original':3A,4A 'radio':24 'remastered':5A,6A 'remixes':11C 'set':15 'velvet':8B,17
                                    'tag_tracknum'  1
                                      'num_images'  0
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-3', 'q-play-2', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-3', 'q-chart-3', 'q-other-1', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronica', 'house', 'techno', 'electronic', 'electro']
                                        'tag_date'  
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1620573835.1127245  (2021-05-09 17:23:55)
                             'size'  12830294