======================== unified (from filesystem) ========================
                                         'bitrate'  '125.031'
                                        'duration'  '224'
                                          'artist'  'O V  Wright'
                                     'text_people'  ''
                                         'release'  'Dimitri - Soul'
                                           'title'  'A Nickel and a Nail'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-SYN-2', 'Q-BUSY-2', "
 "'Q-GRIT-2', 'Q-PLAY-3', 'q-bass-3', 'Q-CHART-2', 'Q-OLDST-2', 'q-drums-3', "
 "'q-other-2', 'q-piano-1', 'q-vocals-4', 'Q-HHRNBTT-1', 'Q-MIXBEAT-2']")
                                      'lastfmtags'  "['soul', 'southern soul', 'deep soul', 'rhythm and blues', 'male vocals']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  ''
                                        'comments'  ''
                                           'genre'  'funk or soul'
                                             'bpm'  '90.7'
                                             'key'  '9A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Dimitri - Soul'
'TBPM' (BPM (beats per minute))                     '90.7'
'TCON' (Content type, a.k.a. Genre)                 'funk or soul'
'TIT2' (Title/songname/content description)         'A Nickel and a Nail'
'TKEY' (Initial key)                                '9A'
'TPE1' (Lead performer(s)/Soloist(s))               'O V  Wright'
'TPE2' (Band/orchestra/accompaniment)               'Various Artists'
'TSSE' (Software/Hardware and settings used for encoding)  'Lavf58.45.100'
'TXXX:Q-BUSY'                                       '2'
'TXXX:Q-CHART'                                      '2'
'TXXX:Q-GRIT'                                       '2'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-MIXBEAT'                                    '2'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-PLAY'                                       '3'
'TXXX:Q-SYN'                                        '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:lastfmtags'                                   ['soul', 'southern soul', 'deep soul', 'rhythm and blues', 'male vocals']
'TXXX:q-bass'                                       '3'
'TXXX:q-drums'                                      '3'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.78 dB'
'TXXX:replaygain_track_peak'                        '0.455017'
'TXXX:youtube'                                      'KsDaOnQM2hs'

========================== row from database ==========================
                                              'id'  1477431
                                            'path'  /data/Music/Bulk/00exnnpjpsprgttidm/Dimitri/Soul/O V  Wright - A Nickel and a Nail (HQ 320)-KsDaOnQM2hs.mp3
                                         'working'  None
                                         'bitrate'  125
                                    'duration_sec'  224
                                           'genre'  funk or soul
                                        'filesize'  3514157
                                           'mtime'  1628357633
                                   'redo_metaread'  0
                                        'rest_str'   00exnnpjpsprgttidm (HQ 320) KsDaOnQM2hs funk or soul
                                      'tag_artist'  O V  Wright
                                     'tag_release'  Dimitri - Soul
                                       'tag_title'  A Nickel and a Nail
                                             'bpm'  90.7
                                    'search_title'  'a':1 'and':3 'nail':4 'nickel':2
                                   'search_artist'  'o':1 'v':2 'wright':3
                                  'search_release'  'dimitri':1 'soul':2
                                     'search_rest'  '320':3,4 'da':10 'funk':6 'hq':1,2 'ks':9 'ksdaonqm2hs':5 'on':11 'or':7 'qm2hs':12 'soul':8
                                    'search_combo'  '320':12,13 'a':1A 'and':3A 'da':19 'dimitri':8C 'funk':15 'hq':10,11 'ks':18 'ksdaonqm2hs':14 'nail':4A 'nickel':2A 'o':5B 'on':20 'or':16 'qm2hs':21 'soul':9C,17 'v':6B 'wright':7B
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  9A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'Q-MIXBEAT-2', 'Q-OLDST-2', 'Q-GRIT-2', 'Q-UNU-1', 'Q-JZFKS-2', 'Q-CHART-2', 'q-drums-3', 'Q-SYN-2', 'q-other-2', 'Q-BUSY-2', 'Q-HAP-3', 'Q-PLAY-3', 'q-bass-3']
                                      'lastfmtags'  ['soul', 'southern soul', 'deep soul', 'rhythm and blues', 'male vocals']
                                        'tag_date'  
                                     'discogstags'  []

============================== file details ==============================
                                           'mtime'  1628357633.2600527  (2021-08-07 19:33:53)
                             'size'  3514157