Audio glitches at the start of video

Hello, have a few audio glitches at the start of the video. This happens only at
the start of the video, at the first 30-40 sec, where there is a music
soundtrack.
I am using encore 2.0 and a portable HP Pavilion dv4000.
The video was coming from a dv tape that was captured with windows movie maker
as avi and imported as avi to encore.
But the sound was changed to 48 khz, at the edit (Avid).

giannispass.

Please define "Glitches".
If you are referring to anything in the first 2 seconds being missed out, or
garbled, odds are high it is one of 2 things:
1 - Artifact from the original audio. You say that it was "changed to 48KHz
at the edit". Does this mean it was originally a different sample rate?

Neil,

For my edification, please define "Audioblack." I've done searches,
here and on Goolge, and only find pertinent references to it, usually from you,
but cannot find a definition. I have not noticed these "glitches,"
that others have had, and nearly all of my audio is DD 5.1 Surround/AC3
(SureCode), but I worry. By "Audioblack," do you mean to leave 2 sec.
of blank Audio (in my case in PP2), by placing Black Video (2 sec.) on the
Timeline, before any other Video and Audio, or is this something I need to
create in, say Audition? If so, no problem, but I'd like to know if making a WAV
file of 2 sec. duration with the gain set to -∞ will be adequate.
You've piqued my interest, and, as I'm in the middle of an 18 DVD project, all
with the same audio specs., I'd like to make sure that I do not build in any
problems.

Thanks for the education,

Bill.

You have it right - "Audioblack" is an expression I read in the DOlby
Digital 5.1 Encoding Guidelines manual - it's available on their technical
library.
Failing that, please just mail me for a copy. I will also - when I have the time
- get around to writing a quick & dirty "SurCode Premiere Pro Dolby
Digital Encoding" guide and stick it in the FAQ section.
Dolby say this is to give even the slowest consumer DD Decoders sufficient time
to lock down on the stream properly and the effect with a slow decoder is
missing audio - I have an old Cambridge Audio 540R MkI amplifier here that has
this issue, even with DTS as well as DPL II.
It's just slow to lock down, and the result is awful.
Some players also do this if outputting as LPCM from the player, or even more
likely if the RF output is used.

Easiest way is to add this in Premiere Pro, before encoding the file.
Just add the 2 seconds of silence or even a 2 second slow fade-in (I always use
a default 10ms fade-in on all files, in addition to the silence, to avoid any
chance of a pop).

Neil,

Thanks for the response. I started looking for Audioblack in the New Asset list,
the Transitions and Effects, all through Audition, manuals, Internet,
everything, and about all that I found was reference to an indie band -
"Audioblack," or comments attributed to you. I have a lot of material
from Dolby, from when I first began using 5.1 Surround in DVDs, but did not see
this term there. It was probably in some of their more technical papers, and not
the "primer" course ones, that I already had. You very clearly pointed
out *what* the problem was likely to be, but I wanted clarification as to the
exact solution. You cleared that up beautifully.

Based on one of your earlier replies along these lines, I instituted a 2 sec.
gap in my Audio Tracks at the beginning of all Timelines, as part of my workflow
- 2 sec. Black Video, Dip to Black to 1st Title, and silence on my Audio Track,
but was becoming worried, that I needed to create an actual Audio Clip with
certain properties. I see that my interpretation of Audioblack works.

I had not encountered the problems, that some others had, but then my test DVD
players are all higher-end Marantz units, and who knows what a client is likely
to try and play the DVDs on? I wanted to establish a workflow, that would give
me the greatest chance of success, regardless of the hardware. Thanks to you,
and to others, I am honing my workflow, as well as I can.

I think, based on some other responses, that involve hardware, that I will dig
up a very old, and cheap Panasonic DVD from my gym, to use as a test machine -
doesn't get much older, or cheaper, than that.

Greatly appreciated,
Hunt