======================== unified (from filesystem) ========================
                                         'bitrate'  '144.18'
                                        'duration'  '167'
                                          'artist'  'Jimmy Rogers'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'ANY OLD TIME'
                                           '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-3', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['blues', 'chicago blues', 'harmonica blues', 'harmonica', 'country blues']"
                                     'discogstags'  "['blues']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '134.377'
                                             'key'  '8B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '134.377'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'ANY OLD TIME'
'TKEY' (Initial key)                                '8B'
'TPE1' (Lead performer(s)/Soloist(s))               'Jimmy Rogers'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf56.40.101'
'TXXX:DeviceConformanceTemplate'                    'L1'
'TXXX:IsVBR'                                        '1'
'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:discogstags'                                  'blues'
'TXXX:lastfmtags'                                   ['blues', 'chicago blues', 'harmonica blues', 'harmonica', 'country blues']
'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'                                      '3'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.97 dB'
'TXXX:replaygain_track_peak'                        '0.602774'

========================== row from database ==========================
                                              'id'  967757
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Jimmy Rodgers - Any Old Time 1930.wma.mp3
                                         'working'  None
                                         'bitrate'  144
                                    'duration_sec'  167
                                           'genre'  loc-namerica-country
                                        'filesize'  3018752
                                           'mtime'  1621628196
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Rodgers Any Old Time 1930.wma loc namerica country
                                      'tag_artist'  Jimmy Rogers
                                     'tag_release'  None
                                       'tag_title'  ANY OLD TIME
                                             'bpm'  134.377
                                    'search_title'  'any':1 'old':2 'time':3
                                   'search_artist'  'jimmy':1 'rogers':2
                                  'search_release'  
                                     'search_rest'  '1930':10 '1930wma':12 'any':8 'country':4 'exotica':2 'jazz':1 'loc':13 'music':6 'namerica':14 'old':5 'oldies':3 'rodgers':7 'time':9 'wma':11
                                    'search_combo'  '1930':15 '1930wma':17 'any':1A,13 'country':9 'exotica':7 'jazz':6 'jimmy':4B 'loc':18 'music':11 'namerica':19 'old':2A,10 'oldies':8 'rodgers':12 'rogers':5B 'time':3A,14 'wma':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  8B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', '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-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['blues', 'chicago blues', 'harmonica blues', 'harmonica', 'country blues']
                                        'tag_date'  1945
                                     'discogstags'  ['blues']

============================== file details ==============================
                                           'mtime'  1621628196.020413  (2021-05-21 22:16:36)
                             'size'  3018752