======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '155'
                                          'artist'  'Frankie Laine'
                                     'text_people'  ''
                                         'release'  'Greatest Hits'
                                           'title'  'Some Day'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-JZFKS-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['country', 'crooners', '50s', 'oldies', 'male vocalists']"
                                     'discogstags'  "['rock', 'folk, world, & country', 'country rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1954'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '112.821'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'COMM::eng'                                         '54-090 POS 14'
'COMM:ID3v1 Comment:XXX'                            '54-090 POS 14'
'PRIV:AverageLevel:\x87\x13\x00\x00'                PRIV(owner='AverageLevel', data=b'\x87\x13\x00\x00')
'PRIV:PeakValue:ú~\x00\x00'                         PRIV(owner='PeakValue', data=b'\xfa~\x00\x00')
'TALB' (Album/Movie/Show title)                     'Greatest Hits'
'TBPM' (BPM (beats per minute))                     '112.821'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1954'
'TIT2' (Title/songname/content description)         'Some Day'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               'Frankie Laine'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['rock', 'folk, world, & country', 'country rock']
'TXXX:lastfmtags'                                   ['country', 'crooners', '50s', 'oldies', 'male vocalists']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.72 dB'
'TXXX:replaygain_track_peak'                        '0.496024'

========================== row from database ==========================
                                              'id'  1439604
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1954/54-090 - Frankie Laine - Some Day.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  155
                                           'genre'  prerock-vocal
                                        'filesize'  6211456
                                           'mtime'  1621853325
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1954 54 090 prerock vocal
                                      'tag_artist'  Frankie Laine
                                     'tag_release'  Greatest Hits
                                       'tag_title'  Some Day
                                             'bpm'  112.821
                                    'search_title'  'day':2 'some':1
                                   'search_artist'  'frankie':1 'laine':2
                                  'search_release'  'greatest':1 'hits':2
                                     'search_rest'  '00oldiepop':5 '1954':6 '54':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':8 'vocal':9
                                    'search_combo'  '00oldiepop':11 '1954':12 '54':13 'country':10 'day':2A 'exotica':8 'frankie':3B 'greatest':5C 'hits':6C 'jazz':7 'laine':4B 'oldies':9 'prerock':14 'some':1A 'vocal':15
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ['country', 'crooners', '50s', 'oldies', 'male vocalists']
                                        'tag_date'  1954
                                     'discogstags'  ['rock', 'folk, world, & country', 'country rock']

============================== file details ==============================
                                           'mtime'  1621853324.5299804  (2021-05-24 12:48:44)
                             'size'  6211456