======================== unified (from filesystem) ========================
                                         'bitrate'  '160.0'
                                        'duration'  '251'
                                          'artist'  'Eugene Jaudas National Promenade Band'
                                     'text_people'  ''
                                         'release'  'Edison Blue Amberol  2205'
                                           'title'  "Peg O' My Heart Medley"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-LOCALNESS-1', 'Q-UNU-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-1']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1913'
                                        'comments'  ''
                                           'genre'  'prerock-band'
                                             'bpm'  '123.406'
                                             'key'  '6A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Edison Blue Amberol  2205'
'TBPM' (BPM (beats per minute))                     '123.406'
'TCON' (Content type, a.k.a. Genre)                 'prerock-band'
'TDRC' (Recording time)                             '1913'
'TIT2' (Title/songname/content description)         "Peg O' My Heart Medley"
'TKEY' (Initial key)                                '6A'
'TPE1' (Lead performer(s)/Soloist(s))               'Eugene Jaudas National Promenade Band'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '+0.12 dB'
'TXXX:replaygain_track_peak'                        '0.551871'

========================== row from database ==========================
                                              'id'  1522137
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/00oldiepop/1913/Eugene Jaudas National Promenade Band - Peg O_ My Heart Medley 29-12-1913.mp3
                                         'working'  None
                                         'bitrate'  160
                                    'duration_sec'  251
                                           'genre'  prerock-band
                                        'filesize'  5037874
                                           'mtime'  1620559399
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country 00oldiepop 1913 O_ 29 12 1913 prerock band
                                      'tag_artist'  Eugene Jaudas National Promenade Band
                                     'tag_release'  Edison Blue Amberol  2205
                                       'tag_title'  Peg O' My Heart Medley
                                             'bpm'  123.406
                                    'search_title'  'heart':5 'medley':6 'my':4 'o':2,3 'peg':1
                                   'search_artist'  'band':5 'eugene':1 'jaudas':2 'national':3 'promenade':4
                                  'search_release'  '2205':4 'amberol':3 'blue':2 'edison':1
                                     'search_rest'  '00oldiepop':5 '1913':6 '29':8 'band':10 'country':4 'exotica':2 'jazz':1 'o':7 'oldies':3 'prerock':9
                                    'search_combo'  '00oldiepop':20 '1913':21 '2205':15C '29':23 'amberol':14C 'band':11B,25 'blue':13C 'country':19 'edison':12C 'eugene':7B 'exotica':17 'heart':5A 'jaudas':8B 'jazz':16 'medley':6A 'my':4A 'national':9B 'o':2A,3A,22 'oldies':18 'peg':1A 'prerock':24 'promenade':10B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  6A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-1', 'Q-UNU-1', 'Q-JZFKS-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-1']
                                      'lastfmtags'  []
                                        'tag_date'  1913
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1620559399.1274261  (2021-05-09 13:23:19)
                             'size'  5037874