======================== unified (from filesystem) ========================
                                         'bitrate'  '140.824'
                                        'duration'  '197'
                                          'artist'  'Mellile Dunham and His Orch.'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'Mountain Rangers (Contra Dance)'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-2', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', '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'  '1926'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '121.774'
                                             'key'  '3A'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '121.774'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1926'
'TIT2' (Title/songname/content description)         'Mountain Rangers (Contra Dance)'
'TKEY' (Initial key)                                '3A'
'TPE1' (Lead performer(s)/Soloist(s))               'Mellile Dunham and His Orch.'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'TXXX:Length'                                       '197515'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '2'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'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'                        '+2.68 dB'
'TXXX:replaygain_track_peak'                        '0.494046'

========================== row from database ==========================
                                              'id'  966628
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Mellie Dunham and His Orch - Mountain Rangers 1926.wma.mp3
                                         'working'  None
                                         'bitrate'  140
                                    'duration_sec'  197
                                           'genre'  loc-namerica-country
                                        'filesize'  3481600
                                           'mtime'  1621628240
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Mellie 1926.wma loc namerica country
                                      'tag_artist'  Mellile Dunham and His Orch.
                                     'tag_release'  None
                                       'tag_title'  Mountain Rangers (Contra Dance)
                                             'bpm'  121.774
                                    'search_title'  'contra':3,4 'dance':5,6 'mountain':1 'rangers':2
                                   'search_artist'  'and':3 'dunham':2 'his':4 'mellile':1 'orch':5,6
                                  'search_release'  
                                     'search_rest'  '1926':8 '1926wma':10 'country':4 'exotica':2 'jazz':1 'loc':11 'mellie':7 'music':6 'namerica':12 'old':5 'oldies':3 'wma':9
                                    'search_combo'  '1926':20 '1926wma':22 'and':9B 'contra':3A,4A 'country':16 'dance':5A,6A 'dunham':8B 'exotica':14 'his':10B 'jazz':13 'loc':23 'mellie':19 'mellile':7B 'mountain':1A 'music':18 'namerica':24 'old':17 'oldies':15 'orch':11B,12B 'rangers':2A 'wma':21
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  3A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-3', 'Q-LOCALNESS-3', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-2', 'Q-JZFKS-1', 'q-busy-2', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  1926
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628239.506846  (2021-05-21 22:17:19)
                             'size'  3481600