"NOISE" ON REC MONITOR -Sound Forge - PC - MAGIX Community Forums Archive

Subject:"NOISE" ON REC MONITOR Posted by: happs01 Date:5/18/2005 12:48:19 PM I have Audio Studio. When clicking record and monitoring the signal meter, there appears to be a "phantom" signal to about -92db when there is NO HOT SIGNAL active from spidf in. This kills my headroom. Clipping occurs frequently. I cannot set my gain to optimum level or apply effects without clipping. I have been told by SF tech support that this is "noise from your system". What is it picking up? the PC fans? Harddrive noise? Remember, this is BEFORE I apply a hot signal or do any rendering. This did not occur in my previous version of SF.
Subject:RE: "NOISE" ON REC MONITOR Reply by: Geoff_Wood Date:5/18/2005 3:23:32 PM What you are seeing is the noise from your soundcard input circuitry. Maybe your meter scale previously didn't go down to -92. But how a noise level of -92dB could be somehow "killing your headroom" baffles me. Are you setting your inoput level correctly ? geoff Message last edited on5/18/2005 3:24:02 PM byGeoff_Wood.
Subject:RE: "NOISE" ON REC MONITOR Reply by: rraud Date:5/18/2005 3:26:43 PM A noise floor of -92dB is more than acceptable and has absolutly nothing to do with your clipping issues. As Geoff said, maybe our meter resolution changed. Should you wish to adjust it, "right-click" the meter and select a different scale. This will not change levels or anything else. Does the clipping happen on S/PDIF in or analog in? If it happens on the analog in, you will need to lower the source volume before the soundcard or with the soundcard's input gain adj. Message last edited on5/18/2005 3:47:34 PM byrraud.
Subject:RE: "NOISE" ON REC MONITOR Reply by: Iacobus Date:5/19/2005 11:16:03 AM Odd that you're getting noise on your S/PDIF input; mine always reads "-Inf." before it detects an incoming signal. Sounds like you have interference of some sort. Bad cable? What's your sound card? Iacobus ------- RodelWorks - Original Music for the Unafraid Buy Instant ACID by JohnnyRoy and mD! mD at ACIDplanet
Subject:RE: "NOISE" ON REC MONITOR Reply by: happs01 Date:5/27/2005 12:17:52 PM Thanks for the reply, people. I found an email from M-Audio. It has something to do with muting inputs that are not in use. I use a FIREWIRE AUDIOPHILE. I will also, change out my spidif cable and see if that helps. The symptoms are such that when I set my channel gains on my mixer to 12 oclock, if effects are added to the mix, clipping occurs frequently. I could nudge down the gain, I suppose, but this was not necessary previously. Thanks for the suggestions.

Subject:"NOISE" ON REC MONITOR

Posted by: happs01

Date:5/18/2005 12:48:19 PM

I have Audio Studio. When clicking record and monitoring the signal meter, there appears to be a "phantom" signal to about -92db when there is NO HOT SIGNAL active from spidf in. This kills my headroom. Clipping occurs frequently. I cannot set my gain to optimum level or apply effects without clipping. I have been told by SF tech support that this is "noise from your system". What is it picking up? the PC fans? Harddrive noise? Remember, this is BEFORE I apply a hot signal or do any rendering. This did not occur in my previous version of SF.

Subject:RE: "NOISE" ON REC MONITOR

Reply by: Geoff_Wood

Date:5/18/2005 3:23:32 PM

What you are seeing is the noise from your soundcard input circuitry. Maybe your meter scale previously didn't go down to -92.

But how a noise level of -92dB could be somehow "killing your headroom" baffles me. Are you setting your inoput level correctly ?

geoff

Message last edited on5/18/2005 3:24:02 PM byGeoff_Wood.

Subject:RE: "NOISE" ON REC MONITOR

Reply by: rraud

Date:5/18/2005 3:26:43 PM

A noise floor of -92dB is more than acceptable and has absolutly nothing to do with your clipping issues. As Geoff said, maybe our meter resolution changed. Should you wish to adjust it, "right-click" the meter and select a different scale. This will not change levels or anything else.
Does the clipping happen on S/PDIF in or analog in? If it happens on the analog in, you will need to lower the source volume before the soundcard or with the soundcard's input gain adj.

Message last edited on5/18/2005 3:47:34 PM byrraud.

Subject:RE: "NOISE" ON REC MONITOR

Reply by: Iacobus

Date:5/19/2005 11:16:03 AM

Odd that you're getting noise on your S/PDIF input; mine always reads "-Inf." before it detects an incoming signal. Sounds like you have interference of some sort. Bad cable? What's your sound card?

Iacobus
-------
RodelWorks - Original Music for the Unafraid
Buy Instant ACID by JohnnyRoy and mD!
mD at ACIDplanet

Subject:RE: "NOISE" ON REC MONITOR

Reply by: happs01

Date:5/27/2005 12:17:52 PM

Thanks for the reply, people. I found an email from M-Audio. It has something to do with muting inputs that are not in use. I use a FIREWIRE AUDIOPHILE. I will also, change out my spidif cable and see if that helps. The symptoms are such that when I set my channel gains on my mixer to 12 oclock, if effects are added to the mix, clipping occurs frequently. I could nudge down the gain, I suppose, but this was not necessary previously. Thanks for the suggestions.