Surround Low Pass Filter -ACID Product Family - MAGIX Community Forums Archive

Subject:Surround Low Pass Filter Posted by: danika Date:12/31/2004 6:14:08 PM I cannot get the Low Pass Filter to work in a 5.1 Surround mix in Acid 5. I'm using an Audigy 2 ZS card and routing Acid to the Microsoft Sound Mapper. The project options are set to 5.1 Surround for the Master Bus Mode and Enable Low Pass Filter on LFE is checked. I have tried all of the cutoff settings. As an experiment I tried a track with a low string tone (120 hz is the predominant frequency). When I play the track I never see anything on the LFE meter on the Master Bus. If I switch the Surround Panner for that track to LFE only, I do get output on the LFE channel on the Master Bus which tells me it's working. However, I should be getting output on the LFE master bus when Surround Panner is in normal surround mode. Am I misinterpreting something or is this a bug?
Subject:RE: Surround Low Pass Filter Reply by: MarkWWW Date:1/1/2005 4:04:12 AM I think you are misunderstanding the operation of the LFE channel. Nothing will appear on the LFE channel unless you explicitly place it there. You have verified that when you do this (by selecting LFE instead of the surround panner) you do get output on the LFE channel so your setup would appear to be configured correctly. The Low Pass Filter merely acts to ensure that there is no mid- or high-frequency content left in the LFE channel - it does not place anything in the LFE channel that you have not explicitly placed there yourself. Mark
Subject:RE: Surround Low Pass Filter Reply by: danika Date:1/1/2005 10:21:29 AM Well, I'll take your word for it. Seems kind of a strange way to implement an LFE filter. I've done surround mixing with both Cubase and Sonar and they both allow you to route to all 6 channels and filter out the LFE frequencies for the LFE channel only. Sounds like the only way to do that with Acid is to duplicate the track and route one to the LFE channel and the other to the other 5 speaker channels.
Subject:RE: Surround Low Pass Filter Reply by: pwppch Date:1/1/2005 8:09:14 PM Try this: Add a sub bus to the ACID mixer. Route it to the Master bus - which is done by default Set the Surround panner on the sub bus to LFE only For all tracks that you want to contribute to the LFE, set the track's aux send to the sub bus. Peter

Subject:Surround Low Pass Filter

Posted by: danika

Date:12/31/2004 6:14:08 PM

I cannot get the Low Pass Filter to work in a 5.1 Surround mix in Acid 5. I'm using an Audigy 2 ZS card and routing Acid to the Microsoft Sound Mapper. The project options are set to 5.1 Surround for the Master Bus Mode and Enable Low Pass Filter on LFE is checked. I have tried all of the cutoff settings.

As an experiment I tried a track with a low string tone (120 hz is the predominant frequency). When I play the track I never see anything on the LFE meter on the Master Bus. If I switch the Surround Panner for that track to LFE only, I do get output on the LFE channel on the Master Bus which tells me it's working. However, I should be getting output on the LFE master bus when Surround Panner is in normal surround mode.

Am I misinterpreting something or is this a bug?

Subject:RE: Surround Low Pass Filter

Reply by: MarkWWW

Date:1/1/2005 4:04:12 AM

I think you are misunderstanding the operation of the LFE channel.

Nothing will appear on the LFE channel unless you explicitly place it there. You have verified that when you do this (by selecting LFE instead of the surround panner) you do get output on the LFE channel so your setup would appear to be configured correctly.

The Low Pass Filter merely acts to ensure that there is no mid- or high-frequency content left in the LFE channel - it does not place anything in the LFE channel that you have not explicitly placed there yourself.

Mark

Subject:RE: Surround Low Pass Filter

Reply by: danika

Date:1/1/2005 10:21:29 AM

Well, I'll take your word for it. Seems kind of a strange way to implement an LFE filter. I've done surround mixing with both Cubase and Sonar and they both allow you to route to all 6 channels and filter out the LFE frequencies for the LFE channel only. Sounds like the only way to do that with Acid is to duplicate the track and route one to the LFE channel and the other to the other 5 speaker channels.

Subject:RE: Surround Low Pass Filter

Reply by: pwppch

Date:1/1/2005 8:09:14 PM

Try this:

Add a sub bus to the ACID mixer.
Route it to the Master bus - which is done by default
Set the Surround panner on the sub bus to LFE only

For all tracks that you want to contribute to the LFE, set the track's aux send to the sub bus.

Peter