On Mon, 12 Feb 2001 04:09:43 GMT, Doug Hoy wrote:
>On Sat, 10 Feb 2001 18:00:23 -0500, William J. Ball wrote
>(in message <964gvo$t6j$1@news.TCNJ.EDU>):

>> I am getting one frame "beeps" in the audio track of DV captures. The sound
>> is exactly one frame in length and definitely not in the source tape (cannot
>> be heard when played back in the camera). It is occuring very frequently on
>> captures from different tapes. I am capturing from a Canon Optura Pi to and
>> ADS Pyro in Win98 SE using the MS capture device. I have used different
>> tapes (16 bit audio) different systems (PIII and Athlon) different capture
>> software (Media Studio Pro 6 capture and AV_IO) and get the same problem. I
>> have the current version (Directx8) of MSDV.SYS installed. The beeps can be
>> heard in the raw capture file and show up in the editor audio track. Any
>> ideas what is going on here? There are no dropped video frames in these
>> files.

>I hope you get an answer, William, because I have the same problem with a few
>tapes. They are SVHS or SVHS-ET tapes that were digitised onto a Canon ZR10,
>then imported into iMovie on a Graphite iMac.
>I don't think I've ever gotten it on a DV original.
>It's my impression that certain dropouts on the analogue tape are digitised
>wrongly into full-spectrum, full-volume noise. You don't hear it on the
>camcorder because of the built-in DSP (?) perhaps. However, the computer
>records it faithfully. I wonder if there's a post software utility to clean
>these off? Should be easy to spot in the data stream.
>Doug H

This was an occasional problem with the DPS Spark card, too.
There was a freeware DOS software solution for it called
"beepfix", as I recall. It worked well, removing the beeps
with minimal artifacts. Generally, recording back to the
camera and outputing analogue from it removed or reduced
them to an acceptable level, though...