Question:

TVRoZAAAAAYAAQABAeBNVHJrAAAAyQD/AwZQaWFubwAA/1gEBAIYCAD/WQIAAAD/UQMHoS
AAsHkAAMAAALAHZAAKQABbAABdAAD/IQEAAJBFf4NHRQAZQ3+DR0MAg3lAf4NHQAAZQH+D
R0AAg3k+f4NHPgAZQH+DR0AAGUF/g0dBAIN5PH+DRzwAGUB/g0dAAIdZRX+DR0UAGUN/g0
dDAIN5QH+DR0AAGUB/g0dAAIN5RX+DR0UAGUN/g0dDABk+f4NHPgAZQ3+DR0MAg3k+f4NH
PgAZQH+DR0AAAf8vAA==

Sample:

TVRoZAAAAAYAAQABAeBNVHJrAAABCwD/AwZQaWFubwAA/1gEBAIYCAD/WQIAAAD/UQMHoS
AAsHkAAMAAALAHZAAKQABbAABdAAD/IQEAAJBHUINHRwAZPlCDRz4Ag3lAUINHQAAZQ1CD
R0MAGT5Qg0c+ABk8UINHPACDeTxQg0c8ABk+UINfPgABPFCDRzwAGT5Qg0c+AIN5QVCDR0
EAGUBQg0dAABk8UINHPACDeT5Qg0c+AIN5QFCDR0AAGUNQg19DAAFFUINHRQCHWT5Qg18+
AINhQVCDR0EAGUBQg0dAABlDUINHQwCDeTxQg0c8ABlHUINHRwAZRVCDR0UAg3k+UINHPg
CDeT5Qg0c+ABlBUINHQQAZR1CDR0cAAf8vAA==

Answer: all_human_beings_are_born_free_and_equal_in_dignity_and_rights

Sample:

TVRoZAAAAAYAAQABAeBNVHJrAAAAbwD/AwZQaWFubwAA/1gEBAIYCAD/WQIAAAD/UQMHoS
AAsHkAAMAAALAHZAAKQABbAABdAAD/IQEAAJBAUINHQAAZQFCDR0AAGUdQg19HAINhQ1CD
R0MAGUBQg0dAABlDUINHQwAZQFCDR0AAAf8vAA==

Answer: 12tone

Sample:

TVRoZAAAAAYAAQABAeBNVHJrAAAAUgD/AwZQaWFubwAA/1gEBAIYCAD/WQIAAAD/UQMHoS
AAsHkAAMAAALAHZAAKQABbAABdAAD/IQEAAJBDUINHQwAZPlCDRz4AGUNQg0dDAAH/LwA=

Answer: language

Keywords: Base64, MIDI, Solresol, Tom Scott

Solution:
  1. Decode the Base64 data as a MIDI file.
  2. Play the MIDI file.
  3. Transcribe the notes played in the file.
  4. Translate the notes from Solresol language, and match the meaning against popular English lyrics.
  5. Convert the matched lyrics to lowercase, and replace spaces with underscore.
Answer: never_gonna_give_you_up_never_gonna_let_you_down