======================== unified (from filesystem) ========================
                                         'bitrate'  '132.959'
                                        'duration'  '140'
                                          'artist'  'ERNIE FORD'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  'FATBACK'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'Q-HHRNBTT-1', 'Q-LOCALNESS-3', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-4', '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'  "['country', 'classic country', '50s', 'oldies', 'americana']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '84.455'
                                             'key'  '9B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '84.455'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'FATBACK'
'TKEY' (Initial key)                                '9B'
'TPE1' (Lead performer(s)/Soloist(s))               'ERNIE FORD'
'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:lastfmtags'                                   ['country', 'classic country', '50s', 'oldies', 'americana']
'TXXX:q-bass'                                       '4'
'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'                        '+0.09 dB'
'TXXX:replaygain_track_peak'                        '0.528276'

========================== row from database ==========================
                                              'id'  967010
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Tennessee Ernie Ford - Fatback Louisiana USA - written by Stan Freberg.wma.mp3
                                         'working'  None
                                         'bitrate'  132
                                    'duration_sec'  140
                                           'genre'  loc-namerica-country
                                        'filesize'  2338030
                                           'mtime'  1621628283
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Tennessee Ernie Ford Fatback Louisiana USA written by Stan Freberg.wma loc namerica country
                                      'tag_artist'  ERNIE FORD
                                     'tag_release'  None
                                       'tag_title'  FATBACK
                                             'bpm'  84.455
                                    'search_title'  'fatback':1
                                   'search_artist'  'ernie':1 'ford':2
                                  'search_release'  
                                     'search_rest'  'by':14 'country':4 'ernie':8 'exotica':2 'fatback':10 'ford':9 'freberg':16 'frebergwma':18 'jazz':1 'loc':19 'louisiana':11 'music':6 'namerica':20 'old':5 'oldies':3 'stan':15 'tennessee':7 'usa':12 'wma':17 'written':13
                                    'search_combo'  'by':17 'country':7 'ernie':2B,11 'exotica':5 'fatback':1A,13 'ford':3B,12 'freberg':19 'frebergwma':21 'jazz':4 'loc':22 'louisiana':14 'music':9 'namerica':23 'old':8 'oldies':6 'stan':18 'tennessee':10 'usa':15 'wma':20 'written':16
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9B
                                           '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-4', 'q-grit-2']
                                      'lastfmtags'  ['country', 'classic country', '50s', 'oldies', 'americana']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628282.8399298  (2021-05-21 22:18:02)
                             'size'  2338030