Audio to Hard Disk at DVinfo.net

Kent Dammand · September 29th, 2004, 02:46 PM

Im going to record thru a mixer and into Pro Tools LE on my powerbook. This is because we have feeds from the computer and mics also.

Any tips on the session settings I should use on the Pro Tools LE Powerbook session?

Im shooting in 30p with a DVX and the mixer is delivering 48k audio to the camera and the powerbook.

Any other issues I should be aware of ...like to avoid drift etc?

Douglas Spotted Eagle · September 29th, 2004, 04:04 PM

Keep your hard disk defragged.
You'll be lucky if you get lengthy records, simply because of the fact that you're using a laptop harddrive that is also the host of the OS. If possible, i'd recommend using external.

Kent Dammand · September 29th, 2004, 04:11 PM

Thanks Douglas

I am using external

just wondering about drift issues and settings etc

Douglas Spotted Eagle · September 29th, 2004, 04:15 PM

As long as you are 48k, 16 bit, you shouldn't see any real drift. You'll see some, simply because of the different clocks. If it's lengthy program, 20 mins or so...it might be enough to cause you to be off by a few frames.

Kent Dammand · September 29th, 2004, 04:29 PM

The thing I dont get is, does the risk of capture drift between devices start over everytime we stop and then start another take, even if it in the same timeline/track??

Aslo, are you saying if I use 24 bit there will be more drift?

Douglas Spotted Eagle · September 29th, 2004, 05:24 PM

If you use 24 bit, there likely will be more drift.shorter stops/starts are good things for sync.

Kent Dammand · October 26th, 2004, 12:35 AM

Unique? Workflow.

This is about workflow on location using only PT LE on Powerbook.
Need to capture audio from PT to PT LE and VO to DVX camera at same time. then edit entire project in vegas video.

Situation:
Narrator is on camera talking.
PT audio must be captured simultaneously and separately so pristine audio soundtrack can be used in post along with camera Voice track.

Two shotguns.
One mic runs to camera with Y splitter sending same signal to L and R at different levels.
Second mic runs to PT LE as cue track.
ADAT from PT HD system to 002 and into Powerbook running LE.

Problem= using this method I still don’t have time code in PT LE session that will make post audio easier in vegas.

Ricardo Renaldi · October 28th, 2004, 04:38 PM

Hi, not to sound unrespectfull here, but I can not understand the reason why recording to 24 bits is going to exibit more drift that 16 bits.

As far as I understand the reason for the drif are the two different clocks (camcorder or VTR and 002) and that is unchanged either in 16 or 24 bits, they are still two unrelated 48000 clock circles.(if you record n 48K of course).

cheers

Ric

September 29th, 2004, 02:46 PM	#1
Kent Dammand Regular Crew Join Date: May 2004 Posts: 80	Audio to Hard Disk Im going to record thru a mixer and into Pro Tools LE on my powerbook. This is because we have feeds from the computer and mics also. Any tips on the session settings I should use on the Pro Tools LE Powerbook session? Im shooting in 30p with a DVX and the mixer is delivering 48k audio to the camera and the powerbook. Any other issues I should be aware of ...like to avoid drift etc?

September 29th, 2004, 04:04 PM	#2
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	Keep your hard disk defragged. You'll be lucky if you get lengthy records, simply because of the fact that you're using a laptop harddrive that is also the host of the OS. If possible, i'd recommend using external. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

September 29th, 2004, 04:15 PM	#4
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	As long as you are 48k, 16 bit, you shouldn't see any real drift. You'll see some, simply because of the different clocks. If it's lengthy program, 20 mins or so...it might be enough to cause you to be off by a few frames. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

September 29th, 2004, 05:24 PM	#6
Douglas Spotted Eagle VASST Join Date: Jan 2004 Location: Stockton, UT Posts: 5,648	If you use 24 bit, there likely will be more drift.shorter stops/starts are good things for sync. __________________ Douglas Spotted Eagle/Spot Author, producer, composer Certified Sony Vegas Trainer http://www.vasst.com

October 26th, 2004, 12:35 AM	#7
Kent Dammand Regular Crew Join Date: May 2004 Posts: 80	Unique? Workflow. Unique? Workflow. This is about workflow on location using only PT LE on Powerbook. Need to capture audio from PT to PT LE and VO to DVX camera at same time. then edit entire project in vegas video. Situation: Narrator is on camera talking. PT audio must be captured simultaneously and separately so pristine audio soundtrack can be used in post along with camera Voice track. Two shotguns. One mic runs to camera with Y splitter sending same signal to L and R at different levels. Second mic runs to PT LE as cue track. ADAT from PT HD system to 002 and into Powerbook running LE. Problem= using this method I still don’t have time code in PT LE session that will make post audio easier in vegas.

September 29th, 2004, 04:11 PM	#3
Kent Dammand Regular Crew Join Date: May 2004 Posts: 80	Thanks Douglas I am using external just wondering about drift issues and settings etc

September 29th, 2004, 04:29 PM	#5
Kent Dammand Regular Crew Join Date: May 2004 Posts: 80	The thing I dont get is, does the risk of capture drift between devices start over everytime we stop and then start another take, even if it in the same timeline/track?? Aslo, are you saying if I use 24 bit there will be more drift?

October 28th, 2004, 04:38 PM	#8
Ricardo Renaldi Regular Crew Join Date: Sep 2004 Location: Buenos Aires, Argentina Posts: 40	24 bits more drift? Hi, not to sound unrespectfull here, but I can not understand the reason why recording to 24 bits is going to exibit more drift that 16 bits. As far as I understand the reason for the drif are the two different clocks (camcorder or VTR and 002) and that is unchanged either in 16 or 24 bits, they are still two unrelated 48000 clock circles.(if you record n 48K of course). cheers Ric