On Sat, 18 Jan 2003 17:39:50 -0000, "Luis Ortega" <lortega@ntlworld.com> wrote:

[...]

>I started checking the menu settings on the TRV900 and noticed that the

>audio mix had been set to st1 during these operations and the manuals

>recommend setting this between st1 and st2. The other audio related settings

>seemed set ok (hifi sound set to stereo, audio mode set to 16 bit).

>Today I did a quickie edit experiment using the Avid xpress dv and this time

>I exported the timeline to the TRV900, making sure that the audio mix was

>set between st1 and st2 and hifi was set to stereo and audio mode set to 16

>bit. Then I played the exported tape in the GVD300 and this time all of the

>sound is fine when played. It also sounds fine when the TRV900 is used for

>playback.

This should not matter, if you always record in 16-bit mode.

Sony, for reasons unknown, ships all cameras set in 12-bit

mode, and if this is "standard", and if the other track is used,

the camera mixer would normally be set somewhere

between the tracks. But this is not the case...

>Now I have to try re-exporting my students' projects again next Monday at

>school and see if this time the tape will play back OK on the GVD300s.

>Thanks for your advice. Do you think that having the audio mix setting to

>one extreme while doing the export to tape would also be able to cause these

>peoblems?

It would not be what I woyuld have thought...

I would first have guessed that the TRV900 head alignment

was slightly off (Are you using LP-mode? This can show

alignment problems earlier than SP-mode...). The others'

guess can be correct if the sound is VERY hard-clipped

(silence results at the clip-point on playback), but

moderate clipping (a couple of cycles, maybe 20% into

clipping) should not cause this problem (or hand-clapping

would be disasterous...).

>Is there a correct way to set audio mix, audio mode and hifi sound if a

>project has been filmed in 16 bit and then edited with some added sound

>tracks in an editor?

On the camera, you should be able to set 16-bit and ST 1

(and SP-mode...), add sound later, and export it at

16-bit, *48KHz*, checking for hard-clipping before

exporting it (I export the WAV from the editor, import

it into Cool Edit [www.syntrillium.com], and look for

visual clipping [if any is found, I go back and correct

it with manual level adjustments of the clipping areas,

and check it again...]).

>Is 16 bit the correct setting to use on a DV camera if

>the material will be edited later and other sound tracks added in the

>editor? I just assumed that everything should always be shot using 16 bit,

>but I am confused as to what that means in relation to later editing and

>further sound mixing. I read the manuals for the GVD300 and the TRV900 but I

>am still unclear as to what to do.

>Thanks again.

>Luis

"16-bit" will result in the best quality, used at all

stages. Be sure you also use "48KHz" rather than 44KHz...

>"Dean" <dean_usenet@ripperd2.dhs.org> wrote in message

>news:3cah2v8elrsgth3pih7o9ukd35hta93gaj@4ax.com...

>> It shouldn't be a problem, but is the audio track clipping in your

>> edits, IE, is your audio normalized, or hopefully never hits 0dB?

>>

>> -Dean

>>

>> On Fri, 17 Jan 2003 23:34:16 -0000, "Luis ORTEGA"

>> <lortega@ntlworld.com> wrote:

>>

>> >I edited a 10 minute project on my Avid Xpress DV 3.5 desktop system that

>> >used 2 video tracks and 8 audio tracks in a few places, then I did a

>digital

>> >cut (export to tape) to the Sony GVD300 vcr that is connected to my

>system.

>> >I then digitized the edited tape into my laptop that has Premiere 6.5

>using

>> >my Sony TRV900 camcorder to do some further work adding titles, some

>music

>> >sound and some sound effects.

>> >Then I exported the final edited project to tape from the laptop to the

>> >TRV900.

>> >When I play the final edit from the Premiere timeline it sounds fine, and

>> >when I play the tape using the TRV900 to a TV set it also sounds fine.

>But

>> >if I play the tape using the GVD300 I hear sound defects in many places.

>> >Some of the dialogue cuts in and out and sounds corrupted. The defects

>> >always appear in the same places throughout the tape.

>> >The tape always sounds fine when played from the TRV900 and always has

>the

>> >same sound problems when played from the GVD300.

>> >I have another GVD300 at work and the tape also has exactly the same

>sound

>> >problems on that GVD300 as on the one I use at home.

>> >I have re-exported the final edit several times from Premiere to the

>TRV900,

>> >always blanking the tapes, recording to different parts of the tape, and

>> >even using different tapes, and every time the same sound problems appear

>in

>> >the same parts of the project when I play the tape in either GVD300 but

>> >never when I play the project using the TRV900. And the project always

>> >sounds fine when played from the Premiere timeline. The visuals are

>always

>> >fine in all situations.

>> >I am baffled. Sony is baffled, and the Premiere and Avid people don't

>have a

>> >clue.

>> >Needless to say, both the GVD300 and the TRV900 seem to work fine in

>other

>> >situations and when playing other tapes, and Premiere and Xpress DV also

>> >seem to work fine.

>> >Can anyone figure out what I did wrong or what is happening?

>> >Thanks a lot for any advice.

>> >Luis

>> http://ripperd2.dhs.org