======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '141'
                                          'artist'  "Billy Merrin's Commanders"
                                     'text_people'  ''
                                         'release'  'Edison Bell Winner W 6'
                                           'title'  'I Like To Go Back In The Evening (vocal - Merrin)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-2', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-3', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1933'
                                        'comments'  ''
                                           'genre'  'prerock-vocal'
                                             'bpm'  '106.643'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Bell Winner W 6'
'TBPM' (BPM (beats per minute))                     '106.643'
'TCON' (Content type, a.k.a. Genre)                 'prerock-vocal'
'TDRC' (Recording time)                             '1933'
'TIT2' (Title/songname/content description)         'I Like To Go Back In The Evening (vocal - Merrin)'
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               "Billy Merrin's Commanders"
'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:q-bass'                                       '2'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '3'
'TXXX:replaygain_track_gain'                        '+0.95 dB'
'TXXX:replaygain_track_peak'                        '0.563405'

========================== row from database ==========================
                                              'id'  1496169
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1933/Billy Merrin_s Commanders - I Like To Go Back In The Evening (vocal - Merrin) 15-9-1933.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  141
                                           'genre'  prerock-vocal
                                        'filesize'  2826034
                                           'mtime'  1620666425
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1933 Merrin_s 15 9 1933 prerock
                                      'tag_artist'  Billy Merrin's Commanders
                                     'tag_release'  Edison Bell Winner W 6
                                       'tag_title'  I Like To Go Back In The Evening (vocal - Merrin)
                                             'bpm'  106.643
                                    'search_title'  'back':5 'evening':8 'go':4 'i':1 'in':6 'like':2 'merrin':11,12 'the':7 'to':3 'vocal':9,10
                                   'search_artist'  'billy':1 'commanders':5 'merrin':2 'merrins':4 's':3
                                  'search_release'  '6':5 'bell':2 'edison':1 'w':4 'winner':3
                                     'search_rest'  '00oldiepop':5 '1933':6 '9':9 'country':4 'exotica':2 'jazz':1 'merrin':7 'oldies':3 'prerock':10 's':8
                                    'search_combo'  '00oldiepop':27 '1933':28 '6':22C '9':31 'back':5A 'bell':19C 'billy':13B 'commanders':17B 'country':26 'edison':18C 'evening':8A 'exotica':24 'go':4A 'i':1A 'in':6A 'jazz':23 'like':2A 'merrin':11A,12A,14B,29 'merrins':16B 'oldies':25 'prerock':32 's':15B,30 'the':7A 'to':3A 'vocal':9A,10A 'w':21C 'winner':20C
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', '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-4', 'Q-HAP-3', 'q-bass-2', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1933
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620666425.2444584  (2021-05-10 19:07:05)
                             'size'  2826034