Most TVs will output audio via analog out either over RCA outputs or a headphone style jack where you can connect a 3.5mm to RCA adapter cable.

Anyone searching for a HDMI to RCA Audio and NTSC or PAL Video Adapter will be pleased to know that one such device has now arrived at the Adafruit online store and is available to purchase priced ...

RCA to HDMI Converter: Converts analog RCA composite (Yellow, White, Red) input to HDMI 720P/1080P (60HZ) output,displayed on HDTV/Monitor. Plug to Play: ABLEWE Mini RCA to HDMI converter no extra ...