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GNX3 Thread :: noise during record 

Author

Message

tc52

(unregistered)
 

Subject:

noise during record

10/19/2002


I have audiophile 24/96 card and Acid Pro 4.0 and I an getting alot of noise (cracks,hiss,static)when i record. What are the best settings as far as digi out and target system for recording to pc.
Thanks in advance, Terry

Iacobus

(unregistered)
 

Subject:

Re: noise during record

10/20/2002


Cool. A fellow Audiophile, GNX and ACID Pro 4.0 user. :)

I have my target system set to, "Direct." The digital level is about 14 to 15 if I remember right.

Things I can think of:

-Be sure to set the Master Clock under the Hardware Settings tab in the Audiophile's Delta Control Panel to S/PDIF In. The Audiophile has to slave itself to the GNX when using a S/PDIF stream.

Consequently, you'll want to set the S/PDIF Sample Rate (also under the same tab) to 44,100, as this is the sample rate the GNX produces. Be sure to also set your ACID Pro projects to this same sample rate. You can always change it to 96 kHz later after you're done recording.

-Be sure to use a 75 Ohm RCA coaxial cable only. This is the standard for S/PDIF. If you can't tell if the cable is 75 Ohms, use an RCA video cable that has the color-coded yellow plugs; they use this resistance.

-Ensure that your Audiophile is using an IRQ all by itself; it's usually OK if it's sharing an IRQ (especially under Windows XP), but you can be on the safe side and get the Audiophile its own IRQ. There are a couple ways of doing this, including reserving a certain IRQ for a certain PCI slot in your system's BIOS. Consult your motherboard's manual for more details.

-A motherboard with the VIA chipset is usually not recommended for audio production use but I've seen users with the chipset not have any problems. Be sure to get the latest 4-in-1 drivers at VIA's site if this be the case. (I can give the address if needed.)

-Be sure that ACID Pro is basically the only thing running when recording. No instant messengers, software firewalls, antivirus programs, etc., should be running in the background. You can run other audio-related apps like the GenEdit software or Sonic Foundry's Sound Forge. You just don't want anything to interrupt your recording.

-Pick up the latest version of ACID Pro 4.0 here. The latest version is 4.0a Build 237. Sonic Foundry is releasing 4.0b very soon.

Whew. That's all I can think of right now. Good luck. Email and/or post if you need more help. I also lurk in SoFo's ACID and Sound Forge forums a lot. You can find me under the user ID, "mD."

HTH,
Iacobus

Iacobus

(unregistered)
 

Subject:

Re: noise during record

10/20/2002


Forgot to add:

-Be sure to select the Audiophile's output specifically under Options>Preferences on the menu bar and then the Audio tab in ACID Pro 4.0. You should then be able to select a specific input when recording under the recording dialog window.

-If you're using ASIO and Windows 2000 or Windows XP, you might want to consider picking up M-Audio's beta drivers at their site. M-Audio fairly recently posted drivers that fixed an issue with ACID Pro 4.0, as users (including myself) were experiencing crashing when using ASIO with ACID Pro 4.0. The WDM drivers (which are in the same set) do not have this problem.

Iacobus

tc52

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


Thanks for the thorough response. About changing the sample rate to 96, must this always be done before burning the project to cd. I have heard some of yor recordings from links that you have provided on hear and the sound quality is very good which is why i have been dissapointed with the sound quality I have been getting so far. I think I have my digi level down to 6 to keep from clipping. Is this something that acid will cure on its own when it does its "finding peaks" thing. Thanks for the help, Terry

tc52

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


One more thing:

I assumed (silly me) that plugging my mic into the GNX3 would output vocals to the pc via the spdif out. I am still surprised it doesnt work that way. Is the mic input only for recording vocals onto the GNX3 recorder?

Thanks again, Terry

Iacobus

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


Hi again, Terry!

Since you're burning straight to CD from within ACID Pro itself, set (or leave) the sample rate to 44.1 kHz and the resolution to 16-bit, as this is the standard for CD audio. ACID Pro will basically downsample and convert the audio on the fly if the project is set at 24-bit/96 kHz when burning to CD.

My workflow involves rendering the whole project in ACID Pro at 24-bit/96 kHz into a lossless format like WAV. I then take this file into Sound Forge 6 and do some tweaking, including converting to 16-bit and resampling down to 44.1 kHz for CD burning or streaming purposes. The general concensus is that a project that was originally 24-bit dithered down to 16-bit sounds better than if the project was done in 16-bit straight through.

(Note that the full version of Sound Forge 6 supports up to 32-bit/192 kHz audio. Sound Forge Studio 6 only does up to 16-bit/48 kHz audio.)

On top of all this, I make sure that I get my mixes as close to 0.0 dB as possible without clipping in ACID Pro. This involves futzing around with the individual tracks' volume faders. (Usually, you'd leave the Master volume fader alone and adjust individual volumes instead.)

I also typically leave about a decibel or two for headroom, as post-processing in Sound Forge typically will result in a louder file. Some gentle EQ'ing and compression in Sound Forge helps out quite a bit as well.

I believe the only time a mic signal gets passed through to the S/PDIF or 1/4" outs is when the Talker is used. Other than that, the mic signal passes cleanly through the mic output. You could use a mixer that has both XLR input and S/PDIF input/output for this reason.

HTH,
Iacobus

tc52

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


Thanks again Iacobus. I will play around with it for a while and see if I can get some satisfactory results. All the input is greatly appreciated. Terry

tc52

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


OK im down to about my last hair to pull out. I am getting horrible record quality (crackling noise that increases as the recorded sound level increases. The guitar sounds great thru the pc speakers as i am recording but when i play back the recording i get this terrible crackling and hissing noise. I have tryed many different combinations of settings and nothing seems to work so far.
What should digi out be set to
Terry

tc52

(unregistered)
 

Subject:

Re: noise during record

10/22/2002


Here is one more thing i have noticed. I have the same settings for record and playback in asid pro 4.0 and sound forge but the things i record in acid sound like crap and the things i record in sound forge sound fine.
Also if I record at 24 bit in acid I cant open the file in sound forge (can only open 16 bit files in sound forge)

Iacobus

(unregistered)
 

Subject:

Re: noise during record

10/23/2002


Hey again Terry,

I have my digital level set to around 14 or 15, which makes the monitoring meter in the record window in ACID Pro 4.0 reach about -3.0 dB depending upon the preset and tones used.

Things to check:

-If you're using Windows 2000 or Windows XP and you're using ASIO drivers in ACID Pro 4.0, consider picking up the beta drivers available at M-Audio if you haven't done so already. (Email me if you need help here.)

-If using ASIO, try WDM drivers instead. Go to Options>Preferences on the menu bar and then the Audio tab. Select Windows Classic Wave Driver and then a specific output (like S/PDIF) under Default Stereo and Front playback device.

-Also, if you're using ASIO, it could be a case of latency. Go to Options>Preferences on the menu bar and then the Audio tab and click the Advanced button. Next, click the Configure button to launch the Delta Control Panel. Click the Hardware Settings tab. Under DMA Buffer Size in the lower left, choose a higher number of samples. Click Done, OK and then OK again.

-If the meter in ACID Pro 4.0 doesn't clip, ensure that the GNX3 itself isn't clipping. (There should be a clip light next to the Data Wheel on the GNX3.) I seriously doubt it though, as recording in Sound Forge Studio doesn't give you the noise.

-If you want, you can email me a sample project containing a recorded take. (Use the email link in my username to the left.) Save the project in ACD-ZIP format by going to File>Save As on the menu bar in ACID and under Save as type, choose ACID Project With Embedded Media. Attach this ACD-ZIP to an email and zip it off to me. I'm curious to how this recording sounds.

The reason why you can't open 24-bit in Sound Forge is because there are two versions of Sound Forge: Sound Forge 6.0 and Sound Forge Studio 6.0. You have Sound Forge Studio 6.0, which only works with audio up to 16-bit/48 kHz. The full version of Sound Forge 6.0 works with audio up to 32-bit/192 kHz.

Definitely let me know how things work out.

HTH,
Iacobus

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