======================== unified (from filesystem) ========================
                                         'bitrate'  '256.0'
                                        'duration'  '162'
                                          'artist'  'Spencer Davis Group Mk. 1'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-2', "
 "'q-play-2', 'Q-JZFKS-3', 'Q-OLDST-1', 'q-chart-2', 'q-drums-3', 'q-other-4', "
 "'q-piano-1', 'q-vocals-1', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-2']")
                                      'lastfmtags'  "['60s', 'classic rock', 'rock', 'blues', 'british invasion']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '02'
                                      'tracktotal'  ''
                                            'date'  '2005'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '127.0'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '127.0'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '2005'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'Spencer Davis Group Mk. 1'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '02'
'TXXX:ALBUM'                                        'Hammond Heroes: 60s R&B Organ Grooves'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '3'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:TITLE'                                        ["Stevie's Groove", 'Steves Groove']
'TXXX:lastfmtags'                                   ['60s', 'classic rock', 'rock', 'blues', 'british invasion']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.16 dB'
'TXXX:replaygain_track_peak'                        '0.412450'

========================== row from database ==========================
                                              'id'  1501664
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Spencer Davis Group Mk. II - VA - Hammond Heroes - 60s R&B Organ Grooves/02 - Stevie_s Groove.mp3
                                         'working'  None
                                         'bitrate'  256
                                    'duration_sec'  162
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  5214083
                                           'mtime'  1620535391
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country II VA Hammond Heroes 60s R&B Organ Grooves 02 Stevie_s Groove prerock jb jazz lounge or exotica or bossa
                                      'tag_artist'  Spencer Davis Group Mk. 1
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  127.0
                                    'search_title'  None
                                   'search_artist'  '1':6 'davis':2 'group':3 'mk':4,5 'spencer':1
                                  'search_release'  
                                     'search_rest'  '60s':9 'b':11 'bossa':22 'country':4 'exotica':2 'groove':17 'grooves':14 'hammond':7 'heroes':8 'ii':5 'jazz':1 'jb':19 'lounge':20 'oldies':3 'or':21 'organ':13 'prerock':18 'r':10 'rb':12 's':16 'stevie':15 'va':6
                                    'search_combo'  '1':6B '60s':15 'b':17 'bossa':28 'country':10 'davis':2B 'exotica':8 'groove':23 'grooves':20 'group':3B 'hammond':13 'heroes':14 'ii':11 'jazz':7 'jb':25 'lounge':26 'mk':4B,5B 'oldies':9 'or':27 'organ':19 'prerock':24 'r':16 'rb':18 's':22 'spencer':1B 'stevie':21 'va':12
                                    'tag_tracknum'  2
                                      'num_images'  0
                                             'key'  9B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-2', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-3', 'q-busy-3', 'q-drums-3', 'q-piano-1', 'q-syn-2', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-3', 'q-grit-2']
                                      'lastfmtags'  ['60s', 'classic rock', 'rock', 'blues', 'british invasion']
                                        'tag_date'  2005
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620535391.1908894  (2021-05-09 06:43:11)
                             'size'  5214083