The 73-year-old wants to enjoy life away from the microphone, concentrating on his small team of harness horses and spending time with grandchildren and wife Ann.

After finishing his race-calling career in 1998, Tapp has continued to work at Sky Racing but told In The Gig viewers of his decision on Tuesday night.

"It was a lot tougher than I thought it would be to say goodbye because 50 years went before my eyes," Tapp said. "It seemed the right time to call it a day because I started full-time at 2GB on June 21, 1965.

"The last In The Gig for this season is on June 15 and that seems almost perfect timing to me. I have been thinking about it for a while and didn't want to be the bloke around 50 years and eight months. It was nice round number.

"I got to live my passion and talk about it on many different frontiers and there are other things to do now."

Tapp's career moved across the broadcasting spectrums starting in radio where he was understudy to his hero Ken Howard before becoming Sydney's No. 1 caller.

He moved to television at Channel Nine and finished at Sky Channel. Tapp has become an advocate for harness racing.

However he will be remembered by most punters as the caller of the greats of the turf and lists the 12th Man parody of him as among his fondest memories.

"It was done by a genius in Billy Birmingham and I was immensely privileged that he thought to include me," Tapp said. "You don't set out to be a part of those things.

"It is great to look back on my career, which started with calling my first race, a midweek at Canterbury on December 16, 1964. I still remember that and it took another six months to get a full-time job.

"It was what I always wanted to do and I was lucky to be able to do it for so long."

Tapp named Kingston Town as the best horse he had seen.

"There are so many special moments but I think the best horse I have seen was Kingston Town. He had the sweetest action and had the same exhilarating acceleration from five furlongs [1000m] to two miles. He was just exciting," Tapp said.

Meanwhile, Australian Turf Club racecourse manager Lindsay Murphy remained confident Wednesday's Canterbury meeting would go ahead despite the big wet. The track copped more than 150mm in the past a couple of days but was still raceable on Tuesday.

"It is phenomenal at dealing with rain like this, and it was [rated a] heavy-9 when we walked [on Tuesday afternoon] and, provided the forecast is right, I think we will race," Murphy said.

"Randwick has had just over 100ml and the forecast for later in the week looks good, so we should be right for Saturday."

Racing NSW stewards will inspect Newcastle on Wednesday morning, where large sections of the rail had been blown down, to decide if Thursday meeting will be called off.