======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '64'
                                          'artist'  "Saturday's Children"
                                     'text_people'  ''
                                         'release'  'Psychedelic Promos Radio Spots Vol. 1'
                                           'title'  'Chicago Electric Co. Spot'
                                           'quals'  ("['Q-HAP-3', 'Q-UNU-1', 'Q-LOCALNESS-1', 'Q-JZFKS-1', 'Q-HHRNBTT-1', "
 "'Q-OLDST-2', 'q-syn-2', 'q-bass-3', 'q-busy-3', 'q-grit-1', 'q-play-2', "
 "'q-chart-1', 'q-drums-1', 'q-other-2', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  '["60\'s", \'rock\', \'garage rock\', \'garage\', \'all\']'
                                     'discogstags'  "['garage rock', 'rock']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  ''
                                      'tracktotal'  ''
                                            'date'  '1970'
                                        'comments'  ''
                                           'genre'  'nonmusic-commercials'
                                             'bpm'  '134.735'
                                             'key'  '10A'
                                        'acoustid'  ''
rest: ''

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

'TALB' (Album/Movie/Show title)                     'Psychedelic Promos Radio Spots Vol. 1'
'TBPM' (BPM (beats per minute))                     '134.735'
'TCON' (Content type, a.k.a. Genre)                 'nonmusic-commercials'
'TDRC' (Recording time)                             '1970'
'TIT2' (Title/songname/content description)         'Chicago Electric Co. Spot'
'TKEY' (Initial key)                                '10A'
'TPE1' (Lead performer(s)/Soloist(s))               "Saturday's Children"
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '1'
'TXXX:Q-LOCALNESS'                                  '1'
'TXXX:Q-OLDST'                                      '2'
'TXXX:Q-UNU'                                        '1'
'TXXX:discogstags'                                  ['garage rock', 'rock']
'TXXX:lastfmtags'                                   ["60's", 'rock', 'garage rock', 'garage', 'all']
'TXXX:q-bass'                                       '3'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '1'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '1'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '2'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '2'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+0.55 dB'
'TXXX:replaygain_track_peak'                        '0.497209'
'TXXX:tracknum'                                     '55'

========================== row from database ==========================
                                              'id'  1517487
                                            'path'  /data/Music/Bulk/0nonmusic/PsychedelicPromosRadioSpotsVol.1/55. Saturday_s Children - Chicago Electric Co. Spot.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  64
                                           'genre'  nonmusic-commercials
                                        'filesize'  2565348
                                           'mtime'  1620525615
                                   'redo_metaread'  0
                                        'rest_str'   0nonmusic PsychedelicPromosRadioSpotsVol.1 55. Saturday_s nonmusic commercials
                                      'tag_artist'  Saturday's Children
                                     'tag_release'  Psychedelic Promos Radio Spots Vol. 1
                                       'tag_title'  Chicago Electric Co. Spot
                                             'bpm'  134.735
                                    'search_title'  'chicago':1 'co':3,4 'electric':2 'spot':5
                                   'search_artist'  'children':4 's':2 'saturday':1 'saturdays':3
                                  'search_release'  '1':7 'promos':2 'psychedelic':1 'radio':3 'spots':4 'vol':5,6
                                     'search_rest'  '0nonmusic':1 '1':3,16 '55':5,6 'commercials':10 'nonmusic':9 'promos':12 'psychedelic':11 'psychedelicpromosradiospotsvol':2 'psychedelicpromosradiospotsvol1':4 'radio':13 's':8 'saturday':7 'spots':14 'vol':15 'vol1':17
                                    'search_combo'  '0nonmusic':17 '1':16C,19,32 '55':21,22 'chicago':1A 'children':9B 'co':3A,4A 'commercials':26 'electric':2A 'nonmusic':25 'promos':11C,28 'psychedelic':10C,27 'psychedelicpromosradiospotsvol':18 'psychedelicpromosradiospotsvol1':20 'radio':12C,29 's':7B,24 'saturday':6B,23 'saturdays':8B 'spot':5A 'spots':13C,30 'vol':14C,15C,31 'vol1':33
                                    'tag_tracknum'  None
                                      'num_images'  0
                                             'key'  10A
                                           'quals'  ['Q-HHRNBTT-1', 'q-vocals-4', 'Q-LOCALNESS-1', 'q-piano-1', 'q-mixbeat-1', 'q-play-2', 'Q-OLDST-2', 'Q-UNU-1', 'Q-JZFKS-1', 'q-busy-3', 'q-drums-1', 'q-syn-2', 'q-chart-1', 'q-other-2', 'Q-HAP-3', 'q-bass-3', 'q-grit-1']
                                      'lastfmtags'  ["60's", 'rock', 'garage rock', 'garage', 'all']
                                        'tag_date'  1970
                                     'discogstags'  ['garage rock', 'rock']

============================== file details ==============================
                                           'mtime'  1620525615.0750904  (2021-05-09 04:00:15)
                             'size'  2565348