======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '193'
                                          'artist'  'Ambrose & His Orchestra'
                                     'text_people'  ''
                                         'release'  'Just One More Chance: Vol. 4-The HMV Years, Part 2: 1930-1932'
                                           'title'  'A Girl Friend of a Boy Friend'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-1', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-1', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['big band', 'jazz', '40s', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '95.438'
                                             'key'  '8A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Just One More Chance: Vol. 4-The HMV Years, Part 2: 1930-1932'
'TBPM' (BPM (beats per minute))                     '95.438'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'A Girl Friend of a Boy Friend'
'TKEY' (Initial key)                                '8A'
'TLEN' (Length)                                     '193567'
'TPE1' (Lead performer(s)/Soloist(s))               'Ambrose & His Orchestra'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['big band', 'jazz', '40s', 'swing']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'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'                                     '1'
'TXXX:replaygain_track_gain'                        '+3.50 dB'
'TXXX:replaygain_track_peak'                        '0.603545'

========================== row from database ==========================
                                              'id'  1155360
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ambrose Mayfair Hotel Orchestra - A Girl Friend of a Boy Friend 1930.mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  193
                                           'genre'  prerock-swing
                                        'filesize'  3102720
                                           'mtime'  1620559412
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s and 1930s popular Mayfair Hotel prerock swing
                                      'tag_artist'  Ambrose & His Orchestra
                                     'tag_release'  Just One More Chance: Vol. 4-The HMV Years, Part 2: 1930-1932
                                       'tag_title'  A Girl Friend of a Boy Friend
                                             'bpm'  95.438
                                    'search_title'  'a':1 'boy':5 'friend':3 'girl':2 'of':4
                                   'search_artist'  'ambrose':1 'his':2 'orchestra':3
                                  'search_release'  '1930':17 '19301932':19 '1932':18 '2':15,16 '4':8 '4the':10 'chance':4,5 'hmv':11 'just':1 'more':3 'one':2 'part':14 'the':9 'vol':6,7 'years':12,13
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':8 'and':7 'country':4 'exotica':2 'hotel':11 'jazz':1 'mayfair':10 'oldies':3 'popular':9 'prerock':12 'swing':13
                                    'search_combo'  '00oldiepop':32 '1920s':33 '1930':25C '19301932':27C '1930s':35 '1932':26C '2':23C,24C '4':16C '4the':18C 'a':1A 'ambrose':6B 'and':34 'boy':5A 'chance':12C,13C 'country':31 'exotica':29 'friend':3A 'girl':2A 'his':7B 'hmv':19C 'hotel':38 'jazz':28 'just':9C 'mayfair':37 'more':11C 'of':4A 'oldies':30 'one':10C 'orchestra':8B 'part':22C 'popular':36 'prerock':39 'swing':40 'the':17C 'vol':14C,15C 'years':20C,21C
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  8A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['big band', 'jazz', '40s', 'swing']
                                        'tag_date'  1930
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559411.611663  (2021-05-09 13:23:31)
                             'size'  3102720