======================== unified (from filesystem) ========================
                                         'bitrate'  '128.0'
                                        'duration'  '219'
                                          'artist'  'Artek, OBX & Jakob'
                                     'text_people'  ''
                                         'release'  ''
                                           'title'  ''
                                           'quals'  ("['Q-HAP-2', 'Q-JZFKS-1', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-3', 'q-syn-3', 'q-bass-4', 'q-busy-3', 'q-grit-2', 'q-play-3', "
 "'q-chart-1', 'q-drums-4', 'q-other-2', 'q-piano-1', 'q-vocals-1', "
 "'q-mixbeat-2']")
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'electronic-experimental'
                                             'bpm'  '120.7'
                                             'key'  '12B'
                                        'acoustid'  ''
rest: ''

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

'TBPM' (BPM (beats per minute))                     '120.7'
'TCON' (Content type, a.k.a. Genre)                 'electronic-experimental'
'TKEY' (Initial key)                                '12B'
'TPE1' (Lead performer(s)/Soloist(s))               'Artek, OBX & Jakob'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '3'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-1.52 dB'
'TXXX:replaygain_track_peak'                        '0.447411'

========================== row from database ==========================
                                              'id'  982943
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/0experimental-electronic/[ZMK Obnoxious 003] Artek, OBX & Jacob/[Obx 003] Artek - Untitled (a2).mp3
                                         'working'  None
                                         'bitrate'  128
                                    'duration_sec'  219
                                           'genre'  electronic-experimental
                                        'filesize'  3519740
                                           'mtime'  1636916752
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 0experimental electronic [ZMK Obnoxious 003] Jacob [Obx 003] Untitled (a2) electronic experimental
                                      'tag_artist'  Artek, OBX & Jakob
                                     'tag_release'  None
                                       'tag_title'  None
                                             'bpm'  120.7
                                    'search_title'  None
                                   'search_artist'  'artek':1,2 'jakob':4 'obx':3
                                  'search_release'  
                                     'search_rest'  '003':6,7 '0experimental':1 'a2':12,13 'electronic':2 'experimental':14 'jacob':8 'obnoxious':5 'obx':9,10 'untitled':11 'zmk':3,4
                                    'search_combo'  '003':10,11 '0experimental':5 'a2':16,17 'artek':1B,2B 'electronic':6 'experimental':18 'jacob':12 'jakob':4B 'obnoxious':9 'obx':3B,13,14 'untitled':15 'zmk':7,8
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  12B
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-mixbeat-2', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-piano-1', 'q-syn-3', 'q-chart-1', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  []
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1636916752.282251  (2021-11-14 20:05:52)
                             'size'  3519740