CompuServe Thread

>> This may seem like a foolish question but how does one dub audio using the >> AG-7750 onto a video without destroying the video portion of the recording. You can only edit onto the linear channels. You can not edit the hi-fi channels without disturbing the video. This is not something that is particular to the AG-7750. All recorders with hi-fi capabilities suffer from this limitation. The only thing you can do, is to make a copy and feed whatever audio source you have to the hi-fi channels. This of course drops your video down a generation, but you'll have great sounding audio. md

Neil, A couple of things to be aware of with the audio on the AG7750. First is there audio getting into the machine. You can check this by the movement of the needles. Sounds simple, but you would be surprised. If you don't see the neddles move, try pushing in the record button, you don't need to push the play at this point. If there is still no movement and you know that you have a source hooked in, check the meter switch on the front and see if it is set to HI-FI or normal. To dub audio onto a tape the audio will have to be coming in through the normal channels. Next check the volume levels via the controls under the meters, if you have turned them up the whole way and still get no meter deflection go around to the back of the machine. Which set of jacks is the source plugged into. The left set is the input of preference. You can record on either HI-FI or Normal through these jacks. If indeed you are plugged in here, check the switch above the jacks. These switches govern the input level for the source you are using. It seems Sony and Panasonic differ on the exact numbers here but generally speaking the -??dB number is for a mike or low pressure source, the -20dB or 0dB position is for a line level source and the +4dB is for an amplified source. If you are on the +4dB position turn down the volume knob on the front and flip this switch to the 0dB position and then sneak the volume back up. Still no audio, turn it down again and switch to the -6dB position. and then try turning it up again. If you still don't have neddle deflection, check your source again. Still no needle deflection? The machine expects a balanced input through the XLR plug. If you are making a cord to step from an unbalanced source to a balanced input, did you wire it right? I can't remember right now which is which but I can find out if necessary. The more simple approach is to buy a matching transformer from Radio Shack. Okay, you already had neddle deflection, "I can hear the music through the speakers I hooked up to the audio monitor jack." –Do you have a record tab in the tape you are using.– Don't laugh, I've done this, put a tape in the machine set up an elaborate edit pushed the red button and watched the event happen on the program monitor and played it back from the record deck, only to find nothing is on the tape. If an edit doesn't take and it should always check the record tab. Check the switch in the "Pocket Area" over in the time code section and see if it is the Audio CH2 position or the LTC position. If it is in the LTC position you will here a high whine on the channel two side. But that only takes care of Channel 2, channel one should be alright. If all of this fails, put a new tape in the machine with a record tab in place, feed the machine some video, a TGA on the frame buffer will do fine and send some audio that makes the neddles move, make sure that the HI-FI Rec switch, in the pocket area, is in the on position and the neddles move with the meter switch in either position, and then perform a crash edit, (push the record and play buttons together.) Now when you play this tape back you should see the neddles move and hear the same sound you recorded, If not, try turniong up the volume controls on the front of the machine, under the meters. I forget right now but sometimes when there is only a single knob it is both a volume control for input as well as output. Still no sound or neddle deflection? Call your dealer and have him/her come to your place and check it out. Good Luck Fred