Business screen magazine (1946)

nick four. The first sic|i in pi(igr:imniing is to place the sound or llic prescnl;ition. nuisic and narialion mixed, mi rack one. Next, connect tiie Synchronizer from projecor "A" and the Programmer from projector "B" hrough a "\" connector to the other stereo input chanlel which will he for track three. Important: Set the ccorder in a multi-play mode, or "sound-on-sound" )osilion. allowing you to adjust controls to get a faint )ick-up of the music and narration from track one as 'ou record the change signals from the Synchronizer ind Programmer. This faint level of sound from track ine is necessary to hear the cues for proper projector hanges. However, it must be a low level to prevent iiterference with the change signals. •\11 volume levels are crucial, and once controls have n set, you should mark their positions. The recorder nput volume control should be set to give a full scale leter deflection for the Synchronizer (/;///,s three volume mils past the zero level mark). Set the Programmer "trigger volume" and sensitivity I maximum for programming. Now place the tape reorder in the "record" mode and put the signals for [L'ctor "A" and "B" on track three. At the same line you are recording a low level of the music and arration mix from track one. Since the Synchronizer tne is operated by the use of the regular projector emote control you might find it helpful to tape this t)ntrol just to the left of the trigger button of the •rogranmier for convenience of operation. After the signals are recorded, you can actually lear them by rewinding the tape and placing the reorder in the "play" mode. You will also be able to lear the faint signal of the music and narration recorded rom track one. Remember, track one still has the iriginal music and narration; it has not been altered. fou can connect the speaker output to the track three kereo channel through the same "Y" connection back (hrough the Synchronizer and Programmer to their ."-pective projectors. Be sure to do this in such a way Kit you can still hear the track three output on the I lecorder speaker. Otherwise, you will lose your cuing iformation. , .Now you are ready to place the recorder in a special I iiode of operation (Uher Dia-pilot I or II ) which will How you to record the signals for projector "C". You liould be able to select a mode of operation that will liable you to record projector-change tones on track Hir while listening to the previously recorded tones n track three, along with the faint music and narration -all when the record button is pressed. If you have lojectors "A" and "B" connected, they will operate IsO. The final step is the pleasure of seeing the au tumaled pmuiam iiin ilself. To ohlaiii perfect synchronization, you need to hear the music and narration and see the first two projectors. For showing, the speaker for track three should be disconnected so the tones will now be inaudible. If you have made a mistake, corrections can be made over portions of the tape, if done carefully; however, you may find it faster to do a complete run-through. Frequently, we have numerous small groups that require the use of the three-projector presentation many times during the day. To simplify its use, we have installed a master switch for the AC power and placed tile sound and signals on a lubricated cartridge tape. A tour guide can walk in and turn on the power switch and push the "play" bullon on tiie tape lecorder to begin the presentation. Slide number 81 in each projector tray is blank, and the cartridge tape has a sensing foil placed so that it will automatically stop the tape loop at the point where it is cued for the next program. Kodak now recommends that Carousel projectors be turned off without the fan cool-down period because of possible damage to optical elements from too-rapid cooling. Accordingly, the master switch can be safely flipped off. following the program, and all units are ready to go for the next presentation. If you cannot adjust your presentation to use as many as 80 slides in each Carousel tray, then fill the remaining spaces with blanks, and program the priipeinumber of signals needed to return each projector tray to zero. I'm sure you will be pleased with the effort you put into a three-projector automated set-up like the one described. You may even want to label it "PMP Model I," "Poor Man's Programmer," if you can decide where to put the label. Here's wishing you the best of success with Multi-Media on a Limited Budget. ./. C. Diirlxim is Secretary of I he Audio-Visual Department, Baptist Home Mission Board. Atlanta. (ieori>ia. Before coniini; to the Home Mission Board, he was with WSBTV in Atlanta and at KMTV. Omaha. Nebraska. ;JNE, 1971 43