======================== unified (from filesystem) ========================
                                         'bitrate'  '160.912'
                                        'duration'  '174'
                                          'artist'  'JOHNNY CASH'
                                     'text_people'  ''
                                         'release'  '2Ufrom south sea island JIM'
                                           'title'  'TENNESSEE STUD'
                                           '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'  "['country', 'folk', 'rockabilly', 'classic country']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1945'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country'
                                             'bpm'  '143.112'
                                             'key'  '1B'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     '2Ufrom south sea island JIM'
'TBPM' (BPM (beats per minute))                     '143.112'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country'
'TDRC' (Recording time)                             '1945'
'TIT2' (Title/songname/content description)         'TENNESSEE STUD'
'TKEY' (Initial key)                                '1B'
'TPE1' (Lead performer(s)/Soloist(s))               'JOHNNY CASH'
'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', 'folk', 'rockabilly', 'classic country']
'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'                        '+1.81 dB'
'TXXX:replaygain_track_peak'                        '0.502695'

========================== row from database ==========================
                                              'id'  966535
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Old Country Music/Johnny Cash - Tennessee Stud.wma.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  174
                                           'genre'  loc-namerica-country
                                        'filesize'  3510039
                                           'mtime'  1621628207
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country Old Country Music Johnny Cash Tennessee Stud.wma loc namerica country
                                      'tag_artist'  JOHNNY CASH
                                     'tag_release'  2Ufrom south sea island JIM
                                       'tag_title'  TENNESSEE STUD
                                             'bpm'  143.112
                                    'search_title'  'stud':2 'tennessee':1
                                   'search_artist'  'cash':2 'johnny':1
                                  'search_release'  '2ufrom':1 'island':4 'jim':5 'sea':3 'south':2
                                     'search_rest'  'cash':8 'country':4 'exotica':2 'jazz':1 'johnny':7 'loc':13 'music':6 'namerica':14 'old':5 'oldies':3 'stud':10 'studwma':12 'tennessee':9 'wma':11
                                    'search_combo'  '2ufrom':5C 'cash':4B,17 'country':13 'exotica':11 'island':8C 'jazz':10 'jim':9C 'johnny':3B,16 'loc':22 'music':15 'namerica':23 'old':14 'oldies':12 'sea':7C 'south':6C 'stud':2A,19 'studwma':21 'tennessee':1A,18 'wma':20
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  1B
                                           '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'  ['country', 'folk', 'rockabilly', 'classic country']
                                        'tag_date'  1945
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621628207.1462126  (2021-05-21 22:16:47)
                             'size'  3510039