======================== unified (from filesystem) ========================
                                         'bitrate'  '112.0'
                                        'duration'  '182'
                                          'artist'  'Kate Smith'
                                     'text_people'  ''
                                         'release'  '1920s and 1930s popular'
                                           'title'  'When The Moon Comes Over The Mountain (w Ben Selvin)'
                                           'quals'  ("['Q-HAP-3', 'Q-LOCALNESS-2', '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-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['female vocalists', 'american', '40s', 'all', 'female popular vocal']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1931'
                                        'comments'  ''
                                           'genre'  'prerock-jb-jazz-o-big band'
                                             'bpm'  '145.790'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     '1920s and 1930s popular'
'TBPM' (BPM (beats per minute))                     '145.790'
'TCON' (Content type, a.k.a. Genre)                 'prerock-jb-jazz-o-big band'
'TDRC' (Recording time)                             '1931'
'TIT2' (Title/songname/content description)         'When The Moon Comes Over The Mountain (w Ben Selvin)'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'Kate Smith'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '2'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['female vocalists', 'american', '40s', 'all', 'female popular vocal']
'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'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.64 dB'
'TXXX:replaygain_track_peak'                        '0.504223'

========================== row from database ==========================
                                              'id'  1498758
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1920s and 1930s popular/Ben Selvin_s Knickerbockers, Kate Smith - When The Moon Comes Over The Mountain 1931.mp3
                                         'working'  None
                                         'bitrate'  112
                                    'duration_sec'  182
                                           'genre'  prerock-jb-jazz-o-big band
                                        'filesize'  2592768
                                           'mtime'  1620524303
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop Selvin_s Knickerbockers, 1931 prerock jb jazz big band
                                      'tag_artist'  Kate Smith
                                     'tag_release'  1920s and 1930s popular
                                       'tag_title'  When The Moon Comes Over The Mountain (w Ben Selvin)
                                             'bpm'  145.79
                                    'search_title'  'ben':9 'comes':4 'moon':3 'mountain':6 'over':5 'selvin':10,11 'the':2 'w':7,8 'when':1
                                   'search_artist'  'kate':1 'smith':2
                                  'search_release'  '1920s':1 '1930s':3 'and':2 'popular':4
                                     'search_rest'  '00oldiepop':5 '1931':10 'band':14 'big':13 'country':4 'exotica':2 'jazz':1 'jb':12 'knickerbockers':8,9 'oldies':3 'prerock':11 's':7 'selvin':6
                                    'search_combo'  '00oldiepop':22 '1920s':14C '1930s':16C '1931':27 'and':15C 'band':31 'ben':9A 'big':30 'comes':4A 'country':21 'exotica':19 'jazz':18 'jb':29 'kate':12B 'knickerbockers':25,26 'moon':3A 'mountain':6A 'oldies':20 'over':5A 'popular':17C 'prerock':28 's':24 'selvin':10A,11A,23 'smith':13B 'the':2A 'w':7A,8A 'when':1A
                                    'tag_tracknum'  None
                                      'num_images'  1
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-2', '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-2', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  ['female vocalists', 'american', '40s', 'all', 'female popular vocal']
                                        'tag_date'  1931
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620524302.5139484  (2021-05-09 03:38:22)
                             'size'  2592768