Hot lav signal to GL-1 w/ Studio 1 at

Go Back   DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders

Canon GL Series DV Camcorders
Canon GL2, GL1 and PAL versions XM2, XM1.

Thread Tools Search this Thread
Old October 7th, 2008, 11:22 AM   #1
Regular Crew
Join Date: Apr 2008
Location: Purcellville, VA
Posts: 49
Hot lav signal to GL-1 w/ Studio 1

I just purchased a used Sony ECM-55 wired lav and made a quick test with my Studio1 adapter, normal speaking voice with the mic clipped at lapel level. The Canon GL-1 camera does not have manual gain control and only the 1/8 miniplug input for external mics. The signal coming to the camera, as audited on headphones plugged into the camera, is very high with the Studio1 attenuator set at full, and I hear some distortion and LOTS of ambient, as well as some sort of regular rumble-hum, not affected by the ground/lift switch. Turning the camera's 2-position attenuator on is too drastic; it must be for rock concerts. Turning down the Studio1 attenuator seems to do the trick. Should I just trust my ears, or do I need to run some tape, upload it into my NLE program and check the wave form? What might be causing this hot signal, since the camera has AGC?
Philip Ulanowsky is offline   Reply With Quote
Old October 8th, 2008, 05:18 AM   #2
Join Date: Sep 2001
Location: Northern VA
Posts: 4,362
Run some tape in the different situations you plan to shoot and check the waveform. Anything else is trusting the accuracy of your headphones and ear, which for most folks are not well calibrated.

The Gl1 has audio AGC that is better than what is found on most low-end camcorder, but it is still AGC and will, within the limits of available gain, try to make all audio about the same average level. Thus ambient background sound level will increase during lulls in program material. There are ways to reduce the apparent pumping of background noise, but that goes beyond the scope of this post.

Using headphones to judge the sound quality can be misleading because the close coupling of the headphones will tend to increase the noticeability of any sound defects such as noise, hiss, etc. It helps your assessment to give the audio a listen in the target environment as well.

The external mic input sensitivity of the GL1 is about -55 dBV, and -35 dBV with MIC ATT enabled. This should allow a reasonable match to the ECM-55 but I do not have the specs of the ECM-55 handy. I believe that it is omnidirectional, which will tend to increase ambient sound pickup.
Don Palomaki is offline   Reply

DV Info Net refers all where-to-buy and where-to-rent questions exclusively to these trusted full line dealers and rental houses...

(800) 223-2500
New York, NY

B&H Photo Video
(866) 521-7381
New York, NY

Texas Media Systems
(512) 440-1400
Austin, TX

Precision Camera
(800) 677-1023
Austin, TX

(800) 323-2325
Mineola, NY

DV Info Net also encourages you to support local businesses and buy from an authorized dealer in your neighborhood.
  You are here: DV Info Net > Canon EOS / MXF / AVCHD / HDV / DV Camera Systems > Canon HDV and DV Camera Systems > Canon XL and GL Series DV Camcorders > Canon GL Series DV Camcorders

Thread Tools Search this Thread
Search this Thread:

Advanced Search



All times are GMT -6. The time now is 11:08 AM.

DV Info Net -- Real Names, Real People, Real Info!
1998-2018 The Digital Video Information Network