======================== unified (from filesystem) ========================
                                         'bitrate'  '198.62'
                                        'duration'  '368'
                                          'artist'  '2562'
                                     'text_people'  ''
                                         'release'  'Unbalance CD'
                                           'title'  'Yes/no'
                                           'quals'  ("['Q-MIXBEAT-3', 'Q-HAP-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-HHRNBTT-1', "
 "'Q-JZFKS-1', 'Q-OLDST-3', 'q-syn-4', 'q-bass-4', 'q-busy-3', 'q-grit-2', "
 "'q-play-3', 'q-chart-2', 'q-drums-4', 'q-other-2', 'q-piano-1', "
 "'q-vocals-1']")
                                      'lastfmtags'  "['electronic', 'dub', 'techno', 'dubstep', 'minimal']"
                                     'discogstags'  "['electronic']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '8'
                                      'tracktotal'  ''
                                            'date'  '2009'
                                        'comments'  ''
                                           'genre'  'electronic-th-techno-minimal or deephouse'
                                             'bpm'  '88.092'
                                             'key'  '1A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Unbalance CD'
'TBPM' (BPM (beats per minute))                     '88.092'
'TCON' (Content type, a.k.a. Genre)                 'electronic-th-techno-minimal or deephouse'
'TDRC' (Recording time)                             '2009'
'TIT2' (Title/songname/content description)         'Yes/no'
'TKEY' (Initial key)                                '1A'
'TPE1' (Lead performer(s)/Soloist(s))               '2562'
'TRCK' (Track number/Position in set)               '8'
'TXXX:Q-HAP'                                        '2'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '3'
'TXXX:Q-OLDST'                                      '3'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  'electronic'
'TXXX:lastfmtags'                                   ['electronic', 'dub', 'techno', 'dubstep', 'minimal']
'TXXX:q-bass'                                       '4'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '4'
'TXXX:q-grit'                                       '2'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '3'
'TXXX:q-syn'                                        '4'
'TXXX:q-vocals'                                     '1'
'TXXX:replaygain_track_gain'                        '-0.71 dB'
'TXXX:replaygain_track_peak'                        '0.484239'

========================== row from database ==========================
                                              'id'  143365
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/2562/Unbalance/08_2562-yes-no.mp3
                                         'working'  None
                                         'bitrate'  198
                                    'duration_sec'  368
                                           'genre'  electronic-th-techno-minimal or deephouse
                                        'filesize'  9149795
                                           'mtime'  1621084944
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm 08_2562 yes electronic th techno minimal or deephouse
                                      'tag_artist'  2562
                                     'tag_release'  Unbalance CD
                                       'tag_title'  Yes/no
                                             'bpm'  88.092
                                    'search_title'  'no':2 'yes':1 'yesno':3
                                   'search_artist'  '2562':1
                                  'search_release'  'cd':2 'unbalance':1
                                     'search_rest'  '08':1 '2562':2 'deephouse':9 'electronic':4 'minimal':7 'or':8 'techno':6 'th':5 'yes':3
                                    'search_combo'  '08':7 '2562':4B,8 'cd':6C 'deephouse':15 'electronic':10 'minimal':13 'no':2A 'or':14 'techno':12 'th':11 'unbalance':5C 'yes':1A,9 'yesno':3A
                                    'tag_tracknum'  8
                                      'num_images'  0
                                             'key'  1A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-1', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-3', 'q-play-3', 'Q-OLDST-3', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-4', 'q-syn-4', 'q-chart-2', 'q-other-2', 'Q-HAP-2', 'q-bass-4', 'q-grit-2']
                                      'lastfmtags'  ['electronic', 'dub', 'techno', 'dubstep', 'minimal']
                                        'tag_date'  2009
                                     'discogstags'  ['electronic']

============================== file details ==============================
                                           'mtime'  1621084943.9604945  (2021-05-15 15:22:23)
                             'size'  9149795