When the station upgraded its technology to include stereo broadcasts, it was rebranded to RPN Stereo.

However, this "quadcast" had some undesirable "ping-pong" effects, much like early stereo broadcasts using the same method did.

It is important that stereo broadcasts be compatible with mono receivers.

But the designers of today's matrix decoders devoted extra effort to producing credible surround from stereo broadcasts and recordings.

It has also improved the sound quality and provided a stereo broadcast, Mr. Bartunek said.

The GLR session is a mono reproduction of the right channel only from the original stereo broadcast.

WASH-FM also conducted early experiments with stereo broadcasts.

One reason, broadcasters say, has been the reluctance of radio makers to produce receivers compatible with stereo broadcasts.

The station began stereo broadcasts in January 1975 and changed its call letters to WKZL.

Disregard what you learned from the history books about the first sound movie, first color TV program, first stereo broadcast.