I don't have the slightest clue, but it sure sounds, err, interesting?:
http://cgi.ebay.ch/Pervobandmaschine-So ... dZViewItem
Uhm, what does a Pervobandmaschine do?
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Bjarne Eldhuset
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Bjarne Eldhuset
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A "perfo tape recorder" is uses standard 1/4 " tape which has a row of perforation holes (round or rectangular) in the geometric centre of the tape. The perforation is exactly between track 2 and track 3 and does not affect the magnetic tracks when playing or recording.
It is an evolution of the former full-coat, because the sound quality does not depend on the film gauge or projection framerate / tape running speed.
The coupling with the film can only be done electronically, not anymore mechanically with sync blocks. The perfo tape recorder has an opto coupler which reads the perforation holes passing by. There are still tapes available with a certain combination of fps and tape speed, f.e. 19 cm/sec and 24 fps or 19 cm/sec and 25 fps, as well as 9,5 cm/sec and 18 fps etc. etc.
That means f.e., when the tape runs with 19 cm/sec, the perforation holes perform an fps output of 24 fps, perfectly for controlling a projector using an electronic synchronizer.
The perfo tape recorder is ideal for achieving lip sync sound when shooting with 8 or 16 mm cameras without crystal control.
1. You shoot with cable sync using any modern stereo handheld recorder (tape, MD, mp3, flash memory...).
2. Then you record the dialog sound to perfo tape, controling the perfo tape recorder with the exact speed of the sync track of the original recording (synchronizer required). Now the perfo tape contains the dialog audio and the sprocket holes of the original film are at equivalent places like the perfo holes of the tape!
3. Now you can transfer the (edited) film to computer, using a projector connected to the same synchronizer, running with crystal control.
4. THe same way, you transfer the dialog audio from the perfo tape to computer, running the perfo tape machine with the synchronizer in crystal mode.
Now the footage will match exactly with the audio and can be completed with music, effects etc.
Once having the sound track ready, it is sufficient to produce a CD or an audio file out of it. Projector connected to synchronizer (crystal mode) allows sync sound with this CD at any time.
Alternatively, you could finish the soundtrack completly on perfo tape, as it provides 4 parallel sound tracks at the same time, but this is more effort than on computer.
With S8 film, the perfo tape transfer can be substituted with audio transfer to magnetic stripe that is still available. But for 16 mm shooting, the perfo tape is indispensable when not having a crystal camera.
The sound quality is perfect (at 19 cm/sec) and only limited by the recording conditions (microfone etc), but not by the analog magnetic tape!
--- Pedro
It is an evolution of the former full-coat, because the sound quality does not depend on the film gauge or projection framerate / tape running speed.
The coupling with the film can only be done electronically, not anymore mechanically with sync blocks. The perfo tape recorder has an opto coupler which reads the perforation holes passing by. There are still tapes available with a certain combination of fps and tape speed, f.e. 19 cm/sec and 24 fps or 19 cm/sec and 25 fps, as well as 9,5 cm/sec and 18 fps etc. etc.
That means f.e., when the tape runs with 19 cm/sec, the perforation holes perform an fps output of 24 fps, perfectly for controlling a projector using an electronic synchronizer.
The perfo tape recorder is ideal for achieving lip sync sound when shooting with 8 or 16 mm cameras without crystal control.
1. You shoot with cable sync using any modern stereo handheld recorder (tape, MD, mp3, flash memory...).
2. Then you record the dialog sound to perfo tape, controling the perfo tape recorder with the exact speed of the sync track of the original recording (synchronizer required). Now the perfo tape contains the dialog audio and the sprocket holes of the original film are at equivalent places like the perfo holes of the tape!
3. Now you can transfer the (edited) film to computer, using a projector connected to the same synchronizer, running with crystal control.
4. THe same way, you transfer the dialog audio from the perfo tape to computer, running the perfo tape machine with the synchronizer in crystal mode.
Now the footage will match exactly with the audio and can be completed with music, effects etc.
Once having the sound track ready, it is sufficient to produce a CD or an audio file out of it. Projector connected to synchronizer (crystal mode) allows sync sound with this CD at any time.
Alternatively, you could finish the soundtrack completly on perfo tape, as it provides 4 parallel sound tracks at the same time, but this is more effort than on computer.
With S8 film, the perfo tape transfer can be substituted with audio transfer to magnetic stripe that is still available. But for 16 mm shooting, the perfo tape is indispensable when not having a crystal camera.
The sound quality is perfect (at 19 cm/sec) and only limited by the recording conditions (microfone etc), but not by the analog magnetic tape!
--- Pedro
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clivetobin
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The original Perfotape recorder was developed by Westrex back I think in the 1960s and had 16mm perforations along one edge, the same distance from the edge as on 16mm picture film. The tape used to be made by 3M, with a 1.5 mil polyester base, and once in a fit of insanity I bought 1200' of it. (I was thinking of building a sync recorder for it.) I think the code was Scotch 102-12SP.Pedro wrote:A "perfo tape recorder" is uses standard 1/4 " tape which has a row of perforation holes (round or rectangular) in the geometric centre of the tape. ...
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clivetobin
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Guess what! I still have the roll after all these years or decades, I found it while cleaning out the basement, and it is now up on Ebay as Item 140087397037. It shows I paid $10.50 for it back probably 40 or 45 years ago. What would that be in today's worthless inflated dollars?clivetobin wrote:The original Perfotape recorder was developed by Westrex back I think in the 1960s and had 16mm perforations along one edge, the same distance from the edge as on 16mm picture film. The tape used to be made by 3M, with a 1.5 mil polyester base, and once in a fit of insanity I bought 1200' of it. (I was thinking of building a sync recorder for it.) I think the code was Scotch 102-12SP.Pedro wrote:A "perfo tape recorder" is uses standard 1/4 " tape which has a row of perforation holes (round or rectangular) in the geometric centre of the tape. ...