======================== unified (from filesystem) ========================
                                         'bitrate'  '192.0'
                                        'duration'  '187'
                                          'artist'  'Callahan Brothers'
                                     'text_people'  'Callahan'
                                         'release'  'Les Triomphes De La Country Music'
                                           'title'  "Brown's Ferry Blues No. 2"
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-1', 'Q-UNU-2', 'q-syn-1', 'q-bass-1', 'q-busy-3', "
 "'q-grit-2', 'q-play-2', 'Q-OLDST-1', 'q-chart-1', 'q-drums-1', 'q-other-3', "
 "'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'q-mixbeat-1', 'Q-LOCALNESS-3']")
                                      'lastfmtags'  "['country', 'folk', 'yodel', 'risque', 'title is a full sentence']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '04'
                                      'tracktotal'  ''
                                            'date'  '2002'
                                        'comments'  ''
                                           'genre'  'loc-namerica-country-early'
                                             'bpm'  '118.428'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'TALB' (Album/Movie/Show title)                     'Les Triomphes De La Country Music'
'TBPM' (BPM (beats per minute))                     '118.428'
'TCOM' (Composer)                                   'Callahan'
'TCON' (Content type, a.k.a. Genre)                 'loc-namerica-country-early'
'TDRC' (Recording time)                             '2002'
'TIT2' (Title/songname/content description)         "Brown's Ferry Blues No. 2"
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               'Callahan Brothers'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TRCK' (Track number/Position in set)               '04'
'TSSE' (Software/Hardware and settings used for encoding)  'Lame3.92'
'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', 'yodel', 'risque', 'title is a full sentence']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'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'                        '+3.97 dB'
'TXXX:replaygain_track_peak'                        '0.706809'

========================== row from database ==========================
                                              'id'  1517993
                                            'path'  /data/Music/Bulk/00blues-jazz-exotica-oldies-country/Les Triomphes De La Country Music - #18 Les Duos/04 - Callahan Brothers _ Brown_s Ferry Blues No. 2.mp3
                                         'working'  None
                                         'bitrate'  192
                                    'duration_sec'  187
                                           'genre'  loc-namerica-country-early
                                        'filesize'  4605417
                                           'mtime'  1621627999
                                   'redo_metaread'  0
                                        'rest_str'   00blues jazz exotica oldies country #18 Duos 04 _ Brown_s loc namerica country early
                                      'tag_artist'  Callahan Brothers
                                     'tag_release'  Les Triomphes De La Country Music
                                       'tag_title'  Brown's Ferry Blues No. 2
                                             'bpm'  118.428
                                    'search_title'  '2':8 'blues':5 'brown':1 'browns':3 'ferry':4 'no':6,7 's':2
                                   'search_artist'  'brothers':2 'callahan':1
                                  'search_release'  'country':5 'de':3 'la':4 'les':1 'music':6 'triomphes':2
                                     'search_rest'  '18':5,6 'brown':8 'country':4 'duos':7 'early':12 'exotica':2 'jazz':1 'loc':10 'namerica':11 'oldies':3 's':9
                                    'search_combo'  '18':21,22 '2':8A 'blues':5A 'brothers':10B 'brown':1A,24 'browns':3A 'callahan':9B 'country':15C,20 'de':13C 'duos':23 'early':28 'exotica':18 'ferry':4A 'jazz':17 'la':14C 'les':11C 'loc':26 'music':16C 'namerica':27 'no':6A,7A 'oldies':19 's':2A,25 'triomphes':12C
                                    'tag_tracknum'  4
                                      'num_images'  1
                                             'key'  1A
                                           '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-3', 'q-drums-1', 'q-syn-1', 'q-chart-1', 'q-other-3', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['country', 'folk', 'yodel', 'risque', 'title is a full sentence']
                                        'tag_date'  2002
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1621627998.5415747  (2021-05-21 22:13:18)
                             'size'  4605417