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In the good old days when recording to analog tape it was common practice to put a few beeps like that between takes so that you could identify different recordings while fast forwarding. I think the practice was two at the head and three at the tail but I'm not sure it was set in stone. On FX recordings I've heard anywhere from two to six or seven. You always do at least two so you don't mistake it for something you actually recorded. You make them by pressing a momentary switch that patches in the tone generator. SD and Sure mixers also have this switch (probably all production mixers do also).
Sounds like what you're describing is "two-pop" - the 1K tone at the two second pre-roll point on a film, usually coincident with white "punch marks" (holes) in the film.
The fast forward/rewind-audible tone thing is something else altogether. That was a 60Hz tone (which as you know, but some might not, is a very low frequency), usually called "slate tone". It was used very commonly in audio studios. A switch on the console (sometimes combined with a talkback/slate mic) would feed it onto whatever tape you were recording onto. It would usually be applied at the beginning of a take. Later, when a tape was fast-wound, with the tape held somewhat closer to the heads as it spun, the 60Hz tone would be audible, but vastly sped up so it sounded like a much higher pitch, which was easily heard. I believe the reason 60Hz was used was that it was the lowest frequency that could be generally counted on to be audible from the generator originally, so you'd be certain when you were applying it.
Pretty much gone these days...
Thanks to you all for the help and interesting history. It turns out that the 1k tone was really what they used in that video clip. I just had to get the timing right. Thank you Luis for those beeps you made. I really liked the ones with the echo. Now I have to decide whether to use that one or the 1k tone.
Actually no. The MixPre and Sure portables and Nagra recorders have a slate tone switch that inserts a 1K tone. It goes as long as you hold the switch.
Thanks to you all for the help and interesting history. It turns out that the 1k tone was really what they used in that video clip. I just had to get the timing right. Thank you Luis for those beeps you made. I really liked the ones with the echo. Now I have to decide whether to use that one or the 1k tone.
Actually no. The MixPre and Sure portables and Nagra recorders have a slate tone switch that inserts a 1K tone. It goes as long as you hold the switch. I'm not sure what production practices were since I deal mostly with FX but when recording FX on the Nagra (and old school folks no mater what they are recording on) use the beeps to separate takes. It's not all that useful most of the time now but on a Nagra roll that might have tons of recorded FX it was indispensable for finding things. You fast forward and you hear the beeps and know your into a new recording.
The only 60Hz tone I know of in film production is pilot tone, and I may be off on the freq., but I believe pilot tone was a 60Hz sine-wave used with crystal sync Nagra recorders.
Well..."slate tone" as I've always known it (and used it many times) pretty much *has* to be a very low frequency because it gets "read" (meaning heard) at accelerated speed, which multiplies the apparent frequency. So a 60 Hz slate tone zipping by at ~15x fast-wind speed would certainly *sound like* ~1K, but isn't. If it was 1k initially, it would sound like 15K under those circumstances, which is most decidedly *not* what one would want. So - yeah - I will respectfully reiterate - slate tone, at least the kind that is used to audibly scan for takes at high speed, is in fact ~60Hz.
Well according to this site, and it jives with my memory, there were a number of crystal feq. but 60Hz was for 24 frame film. If you think about it 14K is pretty high to record reliably on the thin center stripe on 1/4" tape and 24 doesn't fold into 14k evenly.I've used Nagras for exactly zero hours, but Nagra "Pilot Tone" is (was) at least *carried on* a 14KHz signal as I understand it. It may be 60Hz as modulated within the carrier, but the actual tone itself, as heard by the operator, is 14KHz. 99% certain on this...