Canon 7D Audio Test

Coffey Sound · External Since: Nov 05, 2009 Posts: 1

http://www.coffeyinteractive.com/phpbb3/viewtopic.php?f=2&t=1776&sid=a...c08cee8

fudged · External Since: Sep 29, 2009 Posts: 5

On Nov 5, 8:51 pm, Coffey Sound <ste....DeleteThis@coffeysound.com> wrote:
> http://www.coffeyinteractive.com/phpbb3/viewtopic.php?f=2&t=1776&sid=...

Thats great, thanks for the post!

As expected, the SD 702 is incomparable to the rest. Very Clean
sounding. Like I said, no surprise there.

Thanks,

-Dave

beretta · External Since: Jan 31, 2009 Posts: 4

Great Test! Do you think Timecode (TOD) is a constant enough sound
(like beachteks 20khz tone,) to run to 5d/7d's Left channel to keep it
from AutoGaining and put Scratch track on Right Channel?

Eric Toline · External Since: Jun 13, 2009 Posts: 11

On Nov 5, 11:52 pm, beretta <bryanba....DeleteThis@gmail.com> wrote:
> Great Test! Do you think Timecode (TOD) is a constant enough sound
> (like beachteks 20khz tone,) to run to 5d/7d's Left channel to keep it
> from AutoGaining and put Scratch track on Right Channel?

It might but what difference would it make if it's only a scratch
track? There is also the potential problem of tc bleed into the audio
scratch track.

Eric

Eric Toline · External Since: Jun 13, 2009 Posts: 11

On Nov 5, 8:51 pm, Coffey Sound <ste... RemoveThis @coffeysound.com> wrote:
> http://www.coffeyinteractive.com/phpbb3/viewtopic.php?f=2&t=1776&sid=...

Mr. Kennedy should learn the difference between self noise and ambient
noise.

Eric

Charles Tomaras · External Since: May 24, 2004 Posts: 1780

More importantly, what's different between the 5D and the 7D in regards to
more professional audio? Did Canon improve anything with setting levels,
metering, monitoring etc? I don't know as I have little experience with
these cameras. What we really need are tutorials about feeding sound to
these cameras and not just listening tests of a few different front ends
that are for sale. Give us the practical tutorials while showing us these
front ends and you're gonna sell them all the same..

And is it just me or did I hear very little evidence of self noise
differences? I certainly could hear the ambient noise in the room vary with
changes in volume of the microphones but at least on the web presentation it
all sounded about the same to me in regards to self/system noise.

"Coffey Sound" <steven.TakeThisOut@coffeysound.com> wrote in message
news:aa8a6b60-4d17-4063-8fb5-ec438cb26991@13g2000prl.googlegroups.com...
> http://www.coffeyinteractive.com/phpbb3/viewtopic.php?f=2&t=1776&sid=a...c08cee8

Philip Perkins · External Since: Apr 18, 2007 Posts: 42

It may be just me, but I see real sync differences in the web videos.
The first segment (on cam mic) was fine, but the pieces done w/ the
Senn. mic and the PSU seemed very noticeably out of sync here. The
Juiced Link was ok sync wise, the Azden off again, and then ok after.
Strange. All of the cam audio was noisy enough that I could easily
hear the self-noise in the BG on laptop speakers. The JuicedLink
(again) sounded thin and brittle, the BeachTek doesn't seem like it
has much headroom, and something very weird started happening with
transients after the AGC control mojo was turned on. Will the
webvidsters care? Not at all. Sound wise the 7D seems identical to
the 5D.

Philip Perkins

Jon Tatooles · External Since: Apr 10, 2006 Posts: 5

I did a test with a point-and-shoot a while ago. Dual-system is alive
and well with these cameras. Loved the Coffey test and was impressed
with the Beachtek box's ability to spoof the camera's AGC.

http://vimeo.com/3944157

Jon Tatooles
Sound Devices, LLC

Coffey Sound wrote:
> http://www.coffeyinteractive.com/phpbb3/viewtopic.php?f=2&t=1776&sid=a...c08cee8

Eric Toline · External Since: Jun 13, 2009 Posts: 11

On Nov 6, 12:32 pm, Philip Perkins <spami....DeleteThis@yahoo.com> wrote:
> It may be just me, but I see real sync differences in the web videos.
> The first segment (on cam mic) was fine, but the pieces done w/ the
> Senn. mic and the PSU seemed very noticeably out of sync here. The
> Juiced Link was ok sync wise, the Azden off again, and then ok after.
> Strange. All of the cam audio was noisy enough that I could easily
> hear the self-noise in the BG on laptop speakers. The JuicedLink
> (again) sounded thin and brittle, the BeachTek doesn't seem like it
> has much headroom, and something very weird started happening with
> transients after the AGC control mojo was turned on. Will the
> webvidsters care? Not at all. Sound wise the 7D seems identical to
> the 5D.
>
> Philip Perkins

What you hear in the background is not self noise, it's ambience. Self
noise is what the record circuts generate when shorted out.

Eric

¤R¼..-¦°€•*¦*b€rt°• · External Since: Feb 19, 2007 Posts: 324

[[This message is not archived, and is only displayed for one month past post date.]]

On Fri, 06 Nov 2009 11:33:38 -0600, Jon Tatooles
<jon.RemoveThis@nospam.sounddevices.com> schreef:

>I did a test with a point-and-shoot a while ago. Dual-system is alive
>and well with these cameras. Loved the Coffey test and was impressed
>with the Beachtek box's ability to spoof the camera's AGC.
>
>http://vimeo.com/3944157
>
>Jon Tatooles
>Sound Devices, LLC

the day i start spoofing a camera's AGC to record sound, i think i
need to find some other job.

R

Philip Perkins · External Since: Apr 18, 2007 Posts: 42

On Nov 6, 2:05 pm, Eric Toline <audio... RemoveThis @bellsouth.net> wrote:
> On Nov 6, 12:32 pm, Philip Perkins <spami... RemoveThis @yahoo.com> wrote:
>
> > It may be just me, but I see real sync differences in the web videos.
> > The first segment (on cam mic) was fine, but the pieces done w/ the
> > Senn. mic and the PSU seemed very noticeably out of sync here. The
> > Juiced Link was ok sync wise, the Azden off again, and then ok after.
> > Strange. All of the cam audio was noisy enough that I could easily
> > hear the self-noise in the BG on laptop speakers. The JuicedLink
> > (again) sounded thin and brittle, the BeachTek doesn't seem like it
> > has much headroom, and something very weird started happening with
> > transients after the AGC control mojo was turned on. Will the
> > webvidsters care? Not at all. Sound wise the 7D seems identical to
> > the 5D.
>
> > Philip Perkins
>
> What you hear in the background is not self noise, it's ambience. Self
> noise is what the record circuts generate when shorted out.
>
> Eric

When the tester cranks the volume down on the interfaces the ambiance
goes down with it.
I still hear considerable hiss--not ambiance but self-noise.

Philip Perkins