======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '392'
                                          'artist'  '[unknown]'
                                     'text_people'  ''
                                         'release'  'Easy Instr 70s'
                                           'title'  "(AA VV • Samples LP 'April Orchestra Vol.28' (Lib. CZ '78)"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-2', 'q-drums-3', 'q-other-3', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1975'
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '127.5'
                                             'key'  '6B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Easy Instr 70s'
'TBPM' (BPM (beats per minute))                     '127.5'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TDRC' (Recording time)                             '1975'
'TIT2' (Title/songname/content description)         "(AA VV • Samples LP 'April Orchestra Vol.28' (Lib. CZ '78)"
'TKEY' (Initial key)                                '6B'
'TPE1' (Lead performer(s)/Soloist(s))               '[unknown]'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '3'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.05 dB'
'TXXX:replaygain_track_peak'                        '0.818214'

========================== row from database ==========================
                                              'id'  1524364
                                            'path'  /data/Music/Bulk/00popandrock-swing-funk-soul/EASY Instr 70_s/• (Unk. Artist) - (AA VV • Samples LP _April Orchestra Vol.28_ (Lib. CZ _78).mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  392
                                           'genre'  funk or soul
                                        'filesize'  15700688
                                           'mtime'  1628357843
                                   'redo_metaread'  0
                                        'rest_str'   00popandrock swing funk soul EASY 70_s (Unk. Artist) _April Vol.28_ _78) funk or soul
                                      'tag_artist'  [unknown]
                                     'tag_release'  Easy Instr 70s
                                       'tag_title'  (AA VV • Samples LP 'April Orchestra Vol.28' (Lib. CZ '78)
                                             'bpm'  127.5
                                    'search_title'  '28':10 '78':15,16 'aa':1,2 'april':6,7 'cz':14 'lib':12,13 'lp':5 'orchestra':8 'samples':4 'vol':9 'vol28':11 'vv':3
                                   'search_artist'  'unknown':1,2
                                  'search_release'  '70s':3 'easy':1 'instr':2
                                     'search_rest'  '28':13 '70':5 '78':15,16 'april':11 'artist':9,10 'easy':4 'funk':2 'or':17 's':6 'soul':3 'swing':1 'unk':7,8 'vol':12 'vol28':14
                                    'search_combo'  '28':10A,34 '70':26 '70s':21C '78':15A,16A,36,37 'aa':1A,2A 'april':6A,7A,32 'artist':30,31 'cz':14A 'easy':19C,25 'funk':23 'instr':20C 'lib':12A,13A 'lp':5A 'or':38 'orchestra':8A 's':27 'samples':4A 'soul':24 'swing':22 'unk':28,29 'unknown':17B,18B 'vol':9A,33 'vol28':11A,35 'vv':3A
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-3', 'q-syn-2', 'q-chart-2', 'q-other-3', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1975
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357843.00482  (2021-08-07 19:37:23)
                             'size'  15700688