======================== unified (from filesystem) ========================
                                         'bitrate'  '320.0'
                                        'duration'  '173'
                                          'artist'  'Wilmoth Houdini'
                                     'text_people'  ''
                                         'release'  'Poor But Ambitious: Calypso Classics'
                                           'title'  'Bandsman Shooting Case'
                                           'quals'  ("['Q-HAP-3', 'Q-JZFKS-2', 'Q-UNU-2', 'Q-LOCALNESS-3', 'Q-HHRNBTT-1', "
 "'Q-OLDST-1', 'q-syn-1', 'q-bass-1', 'q-busy-3', 'q-grit-2', 'q-play-2', "
 "'q-chart-2', 'q-drums-1', 'q-other-4', 'q-piano-1', 'q-vocals-4', "
 "'q-mixbeat-1']")
                                      'lastfmtags'  "['world', 'calypso', 'caribbean', 'trinidad']"
                                     'discogstags'  "['calypso']"
                             'musicbrainz_albumid'  ''
                       'musicbrainz_albumartistid'  ''
                            'musicbrainz_artistid'  ''
                             'musicbrainz_trackid'  ''
                                     'tracknumber'  '21'
                                      'tracktotal'  ''
                                            'date'  '1930'
                                        'comments'  ''
                                           'genre'  'loc-style-calypso'
                                             'bpm'  '104.336'
                                             'key'  '10B'
                                        'acoustid'  ''
rest: ''

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

'APIC:'                                             type PictureType.COVER_FRONT (Cover (front)) b''
                                     
'COMM:ID3v1 Comment:XXX'                            ' 0000051D 0000051D 0000490A'
'COMM:iTunNORM:eng'                                 (' 0000051D 0000051D 0000490A 0000490A 0001314E 0001314E 00007913 00007913 '
 '000170E3 000170E3')
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'PRIV:PeakValue:!y\x00\x00'                         PRIV(owner='PeakValue', data=b'!y\x00\x00')
'PRIV:WM/MediaClassPrimaryID:¼}`Ñ#ãâK\x86¡H¤*(D\x1e'  PRIV(owner='WM/MediaClassPrimaryID', data=b'\xbc}`\xd1#\xe3\xe2K\x86\xa1H\xa4*(D\x1e')
'PRIV:WM/MediaClassSecondaryID:\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00'  PRIV(owner='WM/MediaClassSecondaryID', data=b'\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00')
'PRIV:WM/Provider:A\x00M\x00G\x00\x00\x00'          PRIV(owner='WM/Provider', data=b'A\x00M\x00G\x00\x00\x00')
'PRIV:WM/UniqueFileIdentifier:A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x001\x006\x009\x003\x007\x000\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x003\x009\x004\x003\x007\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x001\x009\x005\x002\x008\x001\x00\x00\x00'  PRIV(owner='WM/UniqueFileIdentifier', data=b'A\x00M\x00G\x00a\x00_\x00i\x00d\x00=\x00R\x00 \x00 \x00 \x001\x006\x009\x003\x007\x000\x00;\x00A\x00M\x00G\x00p\x00_\x00i\x00d\x00=\x00P\x00 \x00 \x00 \x00 \x003\x009\x004\x003\x007\x00;\x00A\x00M\x00G\x00t\x00_\x00i\x00d\x00=\x00T\x00 \x00 \x003\x001\x009\x005\x002\x008\x001\x00\x00\x00')
'PRIV:WM/WMCollectionGroupID:\x0fx\x18öK9Í@\x99XÜ\x17Ó*\x01ò'  PRIV(owner='WM/WMCollectionGroupID', data=b'\x0fx\x18\xf6K9\xcd@\x99X\xdc\x17\xd3*\x01\xf2')
'PRIV:WM/WMCollectionID:\x0fx\x18öK9Í@\x99XÜ\x17Ó*\x01ò'  PRIV(owner='WM/WMCollectionID', data=b'\x0fx\x18\xf6K9\xcd@\x99X\xdc\x17\xd3*\x01\xf2')
'PRIV:WM/WMContentID:3ùVï+¶sI\x85?X\x94\x95v/A'     PRIV(owner='WM/WMContentID', data=b'3\xf9V\xef+\xb6sI\x85?X\x94\x95v/A')
'TALB' (Album/Movie/Show title)                     'Poor But Ambitious: Calypso Classics'
'TBPM' (BPM (beats per minute))                     '104.336'
'TCON' (Content type, a.k.a. Genre)                 'loc-style-calypso'
'TDRC' (Recording time)                             '1930'
'TIT2' (Title/songname/content description)         'Bandsman Shooting Case'
'TKEY' (Initial key)                                '10B'
'TLEN' (Length)                                     '174106'
'TPE1' (Lead performer(s)/Soloist(s))               'Wilmoth Houdini'
'TPE2' (Band/orchestra/accompaniment)               'Wilmoth Houdini'
'TPOS' (Part of a set)                              'Arhoolie CD7010'
'TPUB' (Publisher)                                  'Arhoolie'
'TRCK' (Track number/Position in set)               '21'
'TXXX:MUTANGIBLE'                                   'http://holywarbles.blogspot.com'
'TXXX:Q-HAP'                                        '3'
'TXXX:Q-HHRNBTT'                                    '1'
'TXXX:Q-JZFKS'                                      '2'
'TXXX:Q-LOCALNESS'                                  '3'
'TXXX:Q-OLDST'                                      '1'
'TXXX:Q-UNU'                                        '2'
'TXXX:discogstags'                                  'calypso'
'TXXX:lastfmtags'                                   ['world', 'calypso', 'caribbean', 'trinidad']
'TXXX:q-bass'                                       '1'
'TXXX:q-busy'                                       '3'
'TXXX:q-chart'                                      '2'
'TXXX:q-drums'                                      '1'
'TXXX:q-grit'                                       '2'
'TXXX:q-mixbeat'                                    '1'
'TXXX:q-other'                                      '4'
'TXXX:q-piano'                                      '1'
'TXXX:q-play'                                       '2'
'TXXX:q-syn'                                        '1'
'TXXX:q-vocals'                                     '4'
'TXXX:replaygain_track_gain'                        '+1.69 dB'
'TXXX:replaygain_track_peak'                        '0.562437'

========================== row from database ==========================
                                              'id'  1387915
                                            'path'  /data/Music/Bulk/00localcharacter/wilmoth houdini - poor but ambitious [arhoolie]/21 bandsman shooting case.mp3
                                         'working'  None
                                         'bitrate'  320
                                    'duration_sec'  173
                                           'genre'  loc-style-calypso
                                        'filesize'  6981404
                                           'mtime'  1620586433
                                   'redo_metaread'  0
                                        'rest_str'   00localcharacter wilmoth houdini poor but ambitious [arhoolie] 21 bandsman shooting case loc style calypso
                                      'tag_artist'  Wilmoth Houdini
                                     'tag_release'  Poor But Ambitious: Calypso Classics
                                       'tag_title'  Bandsman Shooting Case
                                             'bpm'  104.336
                                    'search_title'  'bandsman':1 'case':3 'shooting':2
                                   'search_artist'  'houdini':2 'wilmoth':1
                                  'search_release'  'ambitious':3,4 'but':2 'calypso':5 'classics':6 'poor':1
                                     'search_rest'  '21':8 'ambitious':5 'arhoolie':6,7 'bandsman':9 'but':4 'calypso':14 'case':11 'houdini':2 'loc':12 'poor':3 'shooting':10 'style':13 'wilmoth':1
                                    'search_combo'  '21':19 'ambitious':8C,9C,16 'arhoolie':17,18 'bandsman':1A,20 'but':7C,15 'calypso':10C,25 'case':3A,22 'classics':11C 'houdini':5B,13 'loc':23 'poor':6C,14 'shooting':2A,21 'style':24 'wilmoth':4B,12
                                    'tag_tracknum'  21
                                      'num_images'  1
                                             'key'  10B
                                           '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-2', 'q-busy-3', 'q-drums-1', 'q-syn-1', 'q-chart-2', 'q-other-4', 'Q-HAP-3', 'q-bass-1', 'q-grit-2']
                                      'lastfmtags'  ['world', 'calypso', 'caribbean', 'trinidad']
                                        'tag_date'  1930
                                     'discogstags'  ['calypso']

============================== file details ==============================
                                           'mtime'  1620586433.0979676  (2021-05-09 20:53:53)
                             'size'  6981404