======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '138'
                                          'artist'  'Deben Bhattacharya'
                                     'text_people'  ''
                                         'release'  '[Argo ZFB 49] Music from Hungary - The Living Tradition - P.1971'
                                           'title'  "A8 Love Songs from Ccárdas dance 2'15"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-3', 'Q-HHRNBTT-1', 'Q-OLDST-1', "
 "'Q-LOCALNESS-4', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-1', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '1971'
                                        'comments'  ''
                                           'genre'  'loc-eur-hungary'
                                             'bpm'  '99.812'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '[Argo ZFB 49] Music from Hungary - The Living Tradition - P.1971'
'TBPM' (BPM (beats per minute))                     '99.812'
'TCON' (Content type, a.k.a. Genre)                 'loc-eur-hungary'
'TDRC' (Recording time)                             '1971'
'TIT2' (Title/songname/content description)         "A8 Love Songs from Ccárdas dance 2'15"
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Deben Bhattacharya'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '4'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '3'
'TXXX:lastfmtags'                                   ['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '1'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+2.81 dB'
'TXXX:replaygain_track_peak'                        '0.547984'

========================== row from database ==========================
                                              'id'  1500929
                                            'path'  /data/Music/Bulk/00localcharacter/00south-europe-middle-east/Deben Bhattacharya - Music from Hungary (Argo, 1971)/A8 Love Songs from Ccárdas dance 2_15-sf.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  138
                                           'genre'  loc-eur-hungary
                                        'filesize'  5537221
                                           'mtime'  1620532677
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter 00south europe middle east (Argo, 1971) Ccárdas 2_15 sf loc eur hungary
                                      'tag_artist'  Deben Bhattacharya
                                     'tag_release'  [Argo ZFB 49] Music from Hungary - The Living Tradition - P.1971
                                       'tag_title'  A8 Love Songs from Ccárdas dance 2'15
                                             'bpm'  99.812
                                    'search_title'  '15':9 '2':8 '215':10 'a8':1 'ccardas':5,6 'dance':7 'from':4 'love':2 'songs':3
                                   'search_artist'  'bhattacharya':2 'deben':1
                                  'search_release'  '1971':13 '49':4,5 'argo':1,2 'from':7 'hungary':8 'living':10 'music':6 'p':12 'p1971':14 'the':9 'tradition':11 'zfb':3
                                     'search_rest'  '00south':1 '15':14 '1971':7,8 '2':13 'argo':5,6 'cca':19 'ccai':9,11 'east':4 'eur':17 'europe':2 'hungary':18 'i':20 'loc':16 'middle':3 'rdas':10,12,21 'sf':15
                                    'search_combo'  '00south':27 '15':9A,40 '1971':25C,33,34 '2':8A,39 '215':10A '49':16C,17C 'a8':1A 'argo':13C,14C,31,32 'bhattacharya':12B 'cca':45 'ccai':35,37 'ccardas':5A,6A 'dance':7A 'deben':11B 'east':30 'eur':43 'europe':28 'from':4A,19C 'hungary':20C,44 'i':46 'living':22C 'loc':42 'love':2A 'middle':29 'music':18C 'p':24C 'p1971':26C 'rdas':36,38,47 'sf':41 'songs':3A 'the':21C 'tradition':23C 'zfb':15C
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-4', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-3', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-1', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['traditional', 'ethnic', 'world music', 'folk', 'ethnomusicologist']
                                        'tag_date'  1971
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620532677.1267974  (2021-05-09 05:57:57)
                             'size'  5537221