======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '167'
                                          'artist'  "Ben Selvin's Knickerbockers"
                                     'text_people'  ''
                                         'release'  "1930's rare and popular music"
                                           'title'  '(Everyone In Town Loves) Little Mary Brown (1931) (Columbia 78 RPM)'
                                           '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-2', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['jazz age', 'swing']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1931'
                                        'comments'  ''
                                           'genre'  'prerock-swing'
                                             'bpm'  '111.455'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     "1930's rare and popular music"
'TBPM' (BPM (beats per minute))                     '111.455'
'TCON' (Content type, a.k.a. Genre)                 'prerock-swing'
'TDRC' (Recording time)                             '1931'
'TIT2' (Title/songname/content description)         '(Everyone In Town Loves) Little Mary Brown (1931) (Columbia 78 RPM)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               "Ben Selvin's Knickerbockers"
'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'                                   ['jazz age', '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'                                     '2'
'TXXX:replaygain_track_gain'                        '+1.88 dB'
'TXXX:replaygain_track_peak'                        '0.471505'

========================== row from database ==========================
                                              'id'  1510752
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers - (Everyone In Town Loves) Little Mary Brown (1931) (Columbia 78 RPM).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  167
                                           'genre'  prerock-swing
                                        'filesize'  2691072
                                           'mtime'  1620559537
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1920s 1930s Selvin_s prerock swing
                                      'tag_artist'  Ben Selvin's Knickerbockers
                                     'tag_release'  1930's rare and popular music
                                       'tag_title'  (Everyone In Town Loves) Little Mary Brown (1931) (Columbia 78 RPM)
                                             'bpm'  111.455
                                    'search_title'  '1931':10,11 '78':14 'brown':9 'columbia':12,13 'everyone':1,2 'in':3 'little':7 'loves':5,6 'mary':8 'rpm':15,16 'town':4
                                   'search_artist'  'ben':1 'knickerbockers':5 's':3 'selvin':2 'selvins':4
                                  'search_release'  '1930':1 '1930s':3 'and':5 'music':7 'popular':6 'rare':4 's':2
                                     'search_rest'  '00oldiepop':5 '1920s':6 '1930s':7 'country':4 'exotica':2 'jazz':1 'oldies':3 'prerock':10 's':9 'selvin':8 'swing':11
                                    'search_combo'  '00oldiepop':33 '1920s':34 '1930':22C '1930s':24C,35 '1931':10A,11A '78':14A 'and':26C 'ben':17B 'brown':9A 'columbia':12A,13A 'country':32 'everyone':1A,2A 'exotica':30 'in':3A 'jazz':29 'knickerbockers':21B 'little':7A 'loves':5A,6A 'mary':8A 'music':28C 'oldies':31 'popular':27C 'prerock':38 'rare':25C 'rpm':15A,16A 's':19B,23C,37 'selvin':18B,36 'selvins':20B 'swing':39 'town':4A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-2', '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'  ['jazz age', 'swing']
                                        'tag_date'  1931
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559536.9837713  (2021-05-09 13:25:36)
                             'size'  2691072