The TV signal from Apollo 11 had limited bandwidth, and an oddball format was used to send and convert the signal.
All of the modern SSTV demos I've seen on YouTube seem to take around a minute to transfer one frame.
In 1969, if you had receiver big enough on earth to listen to Apollo 11's radio signal, would the SSTV tones be audible? And would it be a similar sound to modern SSTV formats?
I can't find much information on this, and it seems no recordings exist sadly.