======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '127'
                                          'artist'  'Bob Thompson'
                                     'text_people'  ''
                                         'release'  'MMM Nice!'
                                           'title'  'Younger than Springtime'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-1', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['lounge', 'instrumental', 'swing', 'spoken word', 'easy listening']"
                                     'discogstags'  "['jazz', 'easy listening']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1959'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-lounge or exotica or bossa'
                                             'bpm'  '113.8'
                                             'key'  '7B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'MMM Nice!'
'TBPM' (BPM (beats per minute))                     '113.8'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-lounge or exotica or bossa'
'TDRC' (Recording time)                             '1959'
'TENC' (Encoded by)                                 'SoundJam MP'
'TIT2' (Title/songname/content description)         'Younger than Springtime'
'TKEY' (Initial key)                                '7B'
'TPE1' (Lead performer(s)/Soloist(s))               'Bob Thompson'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'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:discogstags'                                  ['jazz', 'easy listening']
'TXXX:lastfmtags'                                   ['lounge', 'instrumental', 'swing', 'spoken word', 'easy listening']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.90 dB'
'TXXX:replaygain_track_peak'                        '0.649983'

========================== row from database ==========================
                                              'id'  746362
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/va - space age pop & mid century domestics (jingles & themes)/(1959) bob thompson - younger than springtime.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  127
                                           'genre'  prerock-jb-jazz-lounge or exotica or bossa
                                        'filesize'  5090800
                                           'mtime'  1620539307
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm va space age pop & mid century domestics (jingles & themes) (1959) bob thompson younger springtime prerock jb jazz lounge or exotica or bossa
                                      'tag_artist'  Bob Thompson
                                     'tag_release'  MMM Nice!
                                       'tag_title'  Younger than Springtime
                                             'bpm'  113.8
                                    'search_title'  'springtime':3 'than':2 'younger':1
                                   'search_artist'  'bob':1 'thompson':2
                                  'search_release'  'mmm':1 'nice':2
                                     'search_rest'  '1959':12,13 'age':3 'bob':14 'bossa':24 'century':6 'domestics':7 'exotica':23 'jazz':20 'jb':19 'jingles':8,9 'lounge':21 'mid':5 'or':22 'pop':4 'prerock':18 'space':2 'springtime':17 'themes':10,11 'thompson':15 'va':1 'younger':16
                                    'search_combo'  '1959':19,20 'age':10 'bob':4B,21 'bossa':31 'century':13 'domestics':14 'exotica':30 'jazz':27 'jb':26 'jingles':15,16 'lounge':28 'mid':12 'mmm':6C 'nice':7C 'or':29 'pop':11 'prerock':25 'space':9 'springtime':3A,24 'than':2A 'themes':17,18 'thompson':5B,22 'va':8 'younger':1A,23
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  7B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-2', 'Q-HAP-3', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['lounge', 'instrumental', 'swing', 'spoken word', 'easy listening']
                                        'tag_date'  1959
                                     'discogstags'  ['jazz', 'easy listening']

============================== file details ==============================
                                           'mtime'  1620539306.518795  (2021-05-09 07:48:26)
                             'size'  5090800