XL-1 audio at DVinfo.net

Steve Siegel · November 21st, 2001, 04:50 PM

Can anyone explain the practical difference between the three audio modes on the XL-1. I know that the 16-bit setting gives the "best" audio, and the 12-bit settings allow dubbing into the tape. If you're taping outdoors, and adding sound on the computer, those options don't really make a lot of difference, do they? Is it true that it is difficult to edit together footage shot in 12-bit (32Khz) and that shot in 16-bit (48Khz)?

Thanks,

Steve Siegel

Don Palomaki · November 21st, 2001, 06:26 PM

16-bit allows wider frequency response (on the order of 22kHz compared to 15kHz for the 12-bit mode - if your mics/source are that good. Also, the 12-bit mode invlves some compression, so 16-bit should have a bit less distortion.

As for editing, 16-bit/48 kHz is more convenient if your sound card supports it (some cheap cards do not). In anycase upsampling/conversion will add minimal effort. Some capture software will upsample for you.

Chris Hurd · November 21st, 2001, 08:39 PM

Be sure to read "Introduction to XL1 Audio" -- With basic explanations, XL1 shooters Jon Burkhart and Don Palomaki describe some introductory aspects of this camera's complex audio handling capabilities and their practical applications.

Go the XL1 Watchdog and choose Articles Menu > Microphones & Audio. See also an XL1 FAQ at http://www.dvinfo.net/xl1faq.htm Hope this helps,

November 22nd, 2001, 07:28 AM

I second the advice about reading the info on Chris' website about the audio. Good article.

Practically speaking you will use the 16 bit setting most of the time on single source recordings. If you want to record more sources at once (i.e. different microphones on different subjects) you will use the 12 stereo 1 & 2 mode. If you are confused with that email me and I will give you a quick rundown on how to set it up and use it.

Stefano Archetti · June 22nd, 2004, 07:40 PM

Maybe a stupid question but I red the watchdog article and searched the forum and I'm not sure yet:

I have to record outdoors and later I will add music and a comment, with Final Cut Pro.

Can I set the audio to 16 bit, for best quality?
Or I have to stay at 12 bit because later I will add two further audio channels (music + comment).

I think the 12 bit is useful only if you want to record more than one source AT ONCE, isn't it?

And, if I set audio to 16 bit, and then add a music channel and another audio channel, the final footage can be transferred to tape?

Don Palomaki · June 23rd, 2004, 04:22 AM

If you will be editing on a PC or other non-linear editing system rather than just adding the additional audio to the tape later without other editing, you can use 16-bit mode and add the audio in post production on you NLE.

With the XL1 family, 12-bit mode is best used whey you have more than 2 audio channel. I suspect that it is present in other camcorders mainly as a hold over before NLE became widely affordable and provided a way to add additional audio to previously recorded material..

A. J. deLange · June 30th, 2004, 09:30 AM

I believe it's part of the DV spec.

A.J.

Jimmy McKenzie · July 4th, 2004, 04:31 AM

The technical aspects mentioned previously are all certainly with merit. The underlying theme that emerges is repeated and I will do the same again. NLE is where the composition begins.
12 bit audio is like digital zoom. Avoid. If you really need a syncronous second audio track, take along a second camera and treat it like camera unit 2. Sync it later in post. The pitfalls of unbalanced audio in 12 bit mode does allow for a monitor track, but not a clean result.

November 21st, 2001, 04:50 PM	#1
Steve Siegel Major Player Join Date: Nov 2001 Location: Albuquerque, New Mexico, USA Posts: 839	XL-1 audio Can anyone explain the practical difference between the three audio modes on the XL-1. I know that the 16-bit setting gives the "best" audio, and the 12-bit settings allow dubbing into the tape. If you're taping outdoors, and adding sound on the computer, those options don't really make a lot of difference, do they? Is it true that it is difficult to edit together footage shot in 12-bit (32Khz) and that shot in 16-bit (48Khz)? Thanks, Steve Siegel

November 21st, 2001, 08:39 PM	#3
Chris Hurd Obstreperous Rex Join Date: Jan 2001 Location: San Marcos, TX Posts: 27,366 Images: 513	Be sure to read "Introduction to XL1 Audio" -- With basic explanations, XL1 shooters Jon Burkhart and Don Palomaki describe some introductory aspects of this camera's complex audio handling capabilities and their practical applications. Go the XL1 Watchdog and choose Articles Menu > Microphones & Audio. See also an XL1 FAQ at http://www.dvinfo.net/xl1faq.htm Hope this helps, __________________ CH Search DV Info Net \| 20 years of DVi \| ...Tuesday is Soylent Green Day!

June 23rd, 2004, 04:22 AM	#6
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,487	If you will be editing on a PC or other non-linear editing system rather than just adding the additional audio to the tape later without other editing, you can use 16-bit mode and add the audio in post production on you NLE. With the XL1 family, 12-bit mode is best used whey you have more than 2 audio channel. I suspect that it is present in other camcorders mainly as a hold over before NLE became widely affordable and provided a way to add additional audio to previously recorded material.. __________________ dpalomaki@dspalomaki.com

November 21st, 2001, 06:26 PM	#2
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,487	16-bit allows wider frequency response (on the order of 22kHz compared to 15kHz for the 12-bit mode - if your mics/source are that good. Also, the 12-bit mode invlves some compression, so 16-bit should have a bit less distortion. As for editing, 16-bit/48 kHz is more convenient if your sound card supports it (some cheap cards do not). In anycase upsampling/conversion will add minimal effort. Some capture software will upsample for you.

November 22nd, 2001, 07:28 AM	#4
pjssssss Posts: n/a	I second the advice about reading the info on Chris' website about the audio. Good article. Practically speaking you will use the 16 bit setting most of the time on single source recordings. If you want to record more sources at once (i.e. different microphones on different subjects) you will use the 12 stereo 1 & 2 mode. If you are confused with that email me and I will give you a quick rundown on how to set it up and use it.

June 22nd, 2004, 07:40 PM	#5
Stefano Archetti New Boot Join Date: Feb 2004 Location: italy Posts: 6	Maybe a stupid question but I red the watchdog article and searched the forum and I'm not sure yet: I have to record outdoors and later I will add music and a comment, with Final Cut Pro. Can I set the audio to 16 bit, for best quality? Or I have to stay at 12 bit because later I will add two further audio channels (music + comment). I think the 12 bit is useful only if you want to record more than one source AT ONCE, isn't it? And, if I set audio to 16 bit, and then add a music channel and another audio channel, the final footage can be transferred to tape?

June 30th, 2004, 09:30 AM	#7
A. J. deLange Major Player Join Date: Jun 2004 Location: McLean, VA United States Posts: 749	I believe it's part of the DV spec. A.J.

July 4th, 2004, 04:31 AM	#8
Jimmy McKenzie Major Player Join Date: Jan 2004 Location: Waterloo Ontario Posts: 721	The technical aspects mentioned previously are all certainly with merit. The underlying theme that emerges is repeated and I will do the same again. NLE is where the composition begins. 12 bit audio is like digital zoom. Avoid. If you really need a syncronous second audio track, take along a second camera and treat it like camera unit 2. Sync it later in post. The pitfalls of unbalanced audio in 12 bit mode does allow for a monitor track, but not a clean result.