EDIT: Sorry! I answered without first reading the article. What I'm talking about below is different from TFA. You could record the audio to an audio cassette

EDIT: Sorry! I answered without first reading the article. What I'm talking about below is different from TFA. You could record the audio to an audio cassette tape. If you had a good enough cassette deck, you could use acoustic coupling (holding up the tape deck to the TV speaker). The BBC Micro had a 7-pin DIN socket for audio in/out and remote control of an external tape deck. https://www.google.com/search?client=ms-android-google&sca_esv=6a81f2bd04fd845e&sxsrf=AHTn8zogNYErzoBCgDp90TrBLcOqBob3kw:1744072500781&q=acorn+electron+din+3.5mm&udm=2&fbs=ABzOT_A-D3gqhGpKey3m541in_a4RKm-RwWvgUIJdCbZIh7nJCdPb2DIcSFzgf9bdDlYgvfQ3veA-JY_fEXVPFCnuk1iYmgChaZIsAocfzN7GM_RP2d84f-slJ16L64I77fndVMJ53XlEmhkP3XkAzvqHAkD8Inxr3nV3GGsKQgjA-1YE3rklaM13OsvhKECiOAxdBul4FbWZdfpEcnmmMPmqcYJlACu6HVEP7JH1QAtTxUBC2AXxEc&sa=X&ved=2ahUKEwjhovyumMeMAxU4DDQIHaV8DEoQtKgLegQIEhAB&biw=448&bih=851&dpr=2.25 https://www.google.com/search?client=ms-android-google&sca_e...