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Audiophiles Can't Differentiate Audio Signals Sent Through Copper, Banana, and Mud in Blind Test
(www.headphonesty.com)
this post was submitted on 01 Feb 2026
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Things are better now, mostly.
I used to record songs from the TV and TELETEXT "radio"... to tape.
Do you realize that 4 bits per sample has a theoretical maximum S/N ratio of some 24 dB? That's 10x the noise amplitude of the worst tapes. Not even Audacity wil let you create files that crappy. Not to mention I often recorded in a bus, resulting in extra noise and dropouts.
I used to use teletext but what is teletext radio? The bitrate of VBI is way more enough than audio but I couldn't find any information about it being used that way...
Sometimes there was music in the background, some sort of radio. Don't stress over it, that was not a technical endeavor.
I mean, when browsing teletext with your decoder you'd get the TV channel's audio unless you muted it. Did you mean "teletext demo" programs that didn't require decoders and were often broadcast just before signoff? In Czechoslovakia before 24-hour TV, we'd get classical music, signoff, the anthem (pre-1989), and then a test pattern with a radio station. Video of this
I'd imagine some teletext demo programs did have radio playing.
It may have been a "radio channel" with text video and an enriched teletext menu. I don't remember exactly.