Audio output issue at DVinfo.net

Gary Griner · February 27th, 2004, 12:13 PM

Hello.

I have a tape I am playing back on an XL1 and the audio out of the headphone jack and out of the RCA jacks is fine ... but the audio out of the Firewire port is horrible. Sounds like an impedance issue but if that were true why would it be fine from in the headphone jack?

BTW: The display on the XL1 indicates that this is 12bit audio.

Anyone have an idea?

Thanks.
Gary

UPDATE 2-28-04:
OK. Can anyone tell me, If the audio was recorded on 4channels ... do all 4 channels pass through the Firewire or just 2?
I am trying to make a dub from the XL1 to a Sony DSR-20 DVCam deck utilizing the Firewire and this is where the audio problem is making itself evident. The "good audio" that I am hearing from the XL1's headphone jack is coming from ST-1 monitor setting.
Does this monitor setting also control what passes through the firewire?

Rob Lohman · February 29th, 2004, 05:58 PM

Yes, all 4 channels should pass over the firewire channel. Whether
or not the device on the other end can handle it correctly is
another matter.

When you say sound over the firewire port is horrible, on what
are you listening to it?

Gary Griner · February 29th, 2004, 07:04 PM

<<<-- Originally posted by Rob Lohman :
When you say sound over the firewire port is horrible, on what
are you listening to it? -->>>
The headphone output on the front of the Sony DSR-20.
The audio meters on the DSR-20 show little if any signal.

Gary

Mark Solleveld · March 4th, 2004, 12:52 PM

Same here..
I shot an interview, on 12-bit, because I wanted to use a handheld mic and the camera mic.

Loading it the pc with firewire.. now I only hear a major hummmm-noise going on, plus soft cameramic.

I'm using Vegas for capturing.. no problems with that besides this.. Listening on headphones won the XL1 I can switch between channels, but it will only capture the cameramic (channel 1)..

Anyone have a solution please?
THX

regards
Mark

Don Palomaki · March 5th, 2004, 05:25 AM

A number of NLE systemd do not default to capture 4-chanel audio, they get only the nominal 2 channels; i.e., ST-1 on the XL1. The better NLEs will capture 4-channel sound, but you have to search the setup parameteres for the NLE to make that setting.

Note that if you are using default Windows or low cost NLE drivers, you may not have access to that parameter in setup. If that is the case, capture the ST-2 output via an analog sound card, or get a product like Scanalyzer (sp?) that support 4-channel capture. There are other past threads here on the topic.

February 27th, 2004, 12:13 PM	#1
Gary Griner Tourist Join Date: Feb 2004 Location: Huntsville, Al Posts: 2	Audio output issue Hello. I have a tape I am playing back on an XL1 and the audio out of the headphone jack and out of the RCA jacks is fine ... but the audio out of the Firewire port is horrible. Sounds like an impedance issue but if that were true why would it be fine from in the headphone jack? BTW: The display on the XL1 indicates that this is 12bit audio. Anyone have an idea? Thanks. Gary UPDATE 2-28-04: OK. Can anyone tell me, If the audio was recorded on 4channels ... do all 4 channels pass through the Firewire or just 2? I am trying to make a dub from the XL1 to a Sony DSR-20 DVCam deck utilizing the Firewire and this is where the audio problem is making itself evident. The "good audio" that I am hearing from the XL1's headphone jack is coming from ST-1 monitor setting. Does this monitor setting also control what passes through the firewire?

February 29th, 2004, 05:58 PM	#2
Rob Lohman RED Code Chef Join Date: Oct 2001 Location: Holland Posts: 12,514	Yes, all 4 channels should pass over the firewire channel. Whether or not the device on the other end can handle it correctly is another matter. When you say sound over the firewire port is horrible, on what are you listening to it? __________________ Rob Lohman, visuar@iname.com DV Info Wrangler & RED Code Chef Join the DV Challenge \| Lady X Search DVinfo.net for quick answers \| Buy from the best: DVinfo.net sponsors

March 5th, 2004, 05:25 AM	#5
Don Palomaki Wrangler Join Date: Sep 2001 Location: Northern VA Posts: 4,488	A number of NLE systemd do not default to capture 4-chanel audio, they get only the nominal 2 channels; i.e., ST-1 on the XL1. The better NLEs will capture 4-channel sound, but you have to search the setup parameteres for the NLE to make that setting. Note that if you are using default Windows or low cost NLE drivers, you may not have access to that parameter in setup. If that is the case, capture the ST-2 output via an analog sound card, or get a product like Scanalyzer (sp?) that support 4-channel capture. There are other past threads here on the topic. __________________ dpalomaki@dspalomaki.com

February 29th, 2004, 07:04 PM	#3
Gary Griner Tourist Join Date: Feb 2004 Location: Huntsville, Al Posts: 2	<<<-- Originally posted by Rob Lohman : When you say sound over the firewire port is horrible, on what are you listening to it? -->>> The headphone output on the front of the Sony DSR-20. The audio meters on the DSR-20 show little if any signal. Gary

March 4th, 2004, 12:52 PM	#4
Mark Solleveld New Boot Join Date: Nov 2003 Location: Soest, Netherlands Posts: 10	Same here.. I shot an interview, on 12-bit, because I wanted to use a handheld mic and the camera mic. Loading it the pc with firewire.. now I only hear a major hummmm-noise going on, plus soft cameramic. I'm using Vegas for capturing.. no problems with that besides this.. Listening on headphones won the XL1 I can switch between channels, but it will only capture the cameramic (channel 1).. Anyone have a solution please? THX regards Mark