by dialing the Lounge number and carrying on a conversation with the person who answered there. Thereafter, beginning on April 30, 1969 and continuing until May 24, 1969 (the period covered by the bookmaking indictment), all incoming and outgoing calls occurring between 10 A.M. and 3 P.M., six days a week, excluding Sunday, were recorded. During that time Detective Hoffman remained at his listening post in the room. From his position he could observe the Lounge and he could see Dye much of the time. However, he could not see the tapped phone, so when Dye used it he was out of view. At times Hoffman was able to observe Dye walk in the direction of the phone and pass out of view, following which through the earpieceWhen this was done, the original tapes were delivered to the judge who issued the wiretap order. They were sealed by him and at his direction placed in a safe in the prosecutor's office. N.J.S.A. 2A:156A-14.
About five months before the trial of the indictment for bookmaking, the defendant was provided with a transcript of the master reel tape containing all of the incriminating calls. This transcript was about 200 pages long, and obviously the intervening five months period allowed adequate time for study thereof in advance of trial. In addition, defendant's request for the Grand Jury testimony was granted.
At the trial the master reel, or recording of the daily "work copies" of the original tapes, was played for the jury and admitted in evidence. At the time of