LP 64 EQ & Compressor

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Widetrack
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2008/07/31 19:05:50 (permalink)

LP 64 EQ & Compressor

I'm trying to use the LP 64 EQ and compressor to master a project.

I have all my tracks routed to Master and I put the EQ and compressor on the Master bus. Each one works fine alone, but when I enable both, the project won't play. I have a Core 2 duo and 1GB RAM and neither get anywhere close to maxed out during playback. CPU usage never gets above 18%.

what am I doing wrong here?
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    CJaysMusic
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    RE: LP 64 EQ & Compressor 2008/07/31 19:08:26 (permalink)
    Raise your latency. There CPU intensive. With Mixing and mastering, a higher latecy will do a project good. Track or record at low latencies and mix and master at higher ones.
    Cj


    www.audio-mastering-mixing.com - A Professional Worldwide Audio Mixing & Mastering Studio, Providing Online And Attended Sessions. Rated # 1 on Top20Sites For Audio Mastering.
     
     
    #2
    John
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    RE: LP 64 EQ & Compressor 2008/07/31 19:17:48 (permalink)
    I don't know about your latency setting is the cause of the problem as such what I wonder is what is causing the non play. Could it be crappy audio drivers? You say that the CPU is only at 18 % so I don't see how the CPU is a being over tasked. What are your system specs?

    CJ as said in another post I never change my latency. Everything works just fine.
    post edited by John - 2008/07/31 19:41:34

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    John
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    dantarbill
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    RE: LP 64 EQ & Compressor 2008/07/31 19:24:02 (permalink)
    ORIGINAL: John

    I don't know about your latency setting is the cause of the problem as such what I wonder is what is causing the non play. Could it be crappy audio drivers? You say that the CPU is only at 18 % so I don't see how the CPU is a being over tasked. What are your system specs?

    CJ as said in another post I never change my latency. Everything works just fine.

    I'll have to side with CJ on this one. Both of the LP64 plugs run with PDC enabled. If you're trying to run your latency lower than the sum of your plug's PDC offsets, you're likely to run into problems...no matter how much CPU power you've got. It isn't clock cycles you are lacking...it's just time time you're short on.
    post edited by dantarbill - 2008/07/31 19:50:05

    Dan Tarbill
    #4
    John
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    RE: LP 64 EQ & Compressor 2008/07/31 19:30:12 (permalink)
    Do you mean Pre Delay Compensation? Sonar has had that for years. And why do you hate to side with CJ.. In this he isn't wrong just not addressing the underlying issue. At least thats the way I see it.

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    John
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    dantarbill
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    RE: LP 64 EQ & Compressor 2008/07/31 19:48:14 (permalink)

    ORIGINAL: John

    Do you mean Pre Delay Compensation? Sonar has had that for years. And why do you hate to side with CJ.. In this he isn't wrong just not addressing the underlying issue. At least thats the way I see it.

    I think that's "Plugin Delay Compensation". Some plugins require a certain amount of time in order to get their work done. As such, they report to the host how much PDC they need (at least I think that's how it works). This typically is handled under the covers and you don't have to do anything specific about it.

    The original version of the SIR convolution reverb had a fixed latency of 8960 samples, which works out to more than 200 ms at 44.1 kHz.

    I was thinking that your mixing latency had to be greater than your PDC's, but I'm not really sure that's the case. I do know that CPU hungry plugs need to be given some room to move in though. The underlying issue is that some plugs are just plain "expensive".

    Dan Tarbill
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    John
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    RE: LP 64 EQ & Compressor 2008/07/31 20:03:10 (permalink)
    The original version of the SIR convolution reverb had a fixed latency of 8960 samples, which works out to more than 200 ms at 44.1 kHz.

    Yep I remember and it was not an issue for me either with a really slow machine.. Here we are talking about only using 18 % of CPU power if our OP is to be believed. So I don't see how changing the latency is the real issue. I am not saying it wont work just it shouldn't be necessary. CW has also said to change latency on occasion. I'm of the school that one shouldn't have to do that if the system is working right. Also it can be a real chore if you are using ASIO.

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    John
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    Widetrack
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    RE: LP 64 EQ & Compressor 2008/07/31 20:22:34 (permalink)
    Thanks for all the suggestions.

    I', running XP pro, all updated, on the core 2 Duo, 1GB RAM and lots of fast disks. Audio interface is the RME Fireface 400 with the latest drivers which usually works pretty nice.

    I checked Sonar's latency settings and it says I'm using ASIO drivers and, interestingly, has the Latency slider hard-panned to the left (which I guess is high; it just says "fast") and I can't move it.

    what is the PDC, and where do I set it?
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    John
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    RE: LP 64 EQ & Compressor 2008/07/31 20:28:38 (permalink)
    I checked Sonar's latency settings and it says I'm using ASIO drivers and, interestingly, has the Latency slider hard-panned to the left (which I guess is high; it just says "fast") and I can't move it.

    Thats normal for ASIO. WDM in Sonar gives the app control over latency. You may need to change your buffer settings on your card. Not the ones in Sonar. RME Fireface 400 is a firewire device I think. It may be due to the firewire chip set on your motherboard. Most often TIs chips are recommended. Others may be problematic.

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    John
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    Widetrack
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    RE: LP 64 EQ & Compressor 2008/07/31 20:59:17 (permalink)
    Just tried a few different settings on the Fireface control called "Buffer Size (latency)" . The default is 256 Samples, and I tried 512, 768 and 1024 with no success.

    Everything works fine except putting both LP effects on the Master Bus.

    OK, this is strange: I have all the tracks go through one of two buses: Horns and rhythm section. Both buses output to the Master. Leaving the LP EQ on the Master, I put the one instance of the LP compressor on each of the buses, and the project plays perfectly. Even though there is now one more compressor involved.

    Thoughts?
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    John
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    RE: LP 64 EQ & Compressor 2008/07/31 21:15:59 (permalink)
    OK, this is strange: I have all the tracks go through one of two buses: Horns and rhythm section. Both buses output to the Master. Leaving the LP EQ on the Master, I put the one instance of the LP compressor on each of the buses, and the project plays perfectly. Even though there is now one more compressor involved.

    Even though I didn't know this at the time of my first post it does point to a system problem and not a latency issue. How is your DPC latency? You may need to download the DPC tool to check.

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    John
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    Widetrack
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    RE: LP 64 EQ & Compressor 2008/07/31 22:06:28 (permalink)
    how do I download DPC?
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    John
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    RE: LP 64 EQ & Compressor 2008/07/31 22:33:21 (permalink)
    Here is a good thread about this. There is a post down a bit where you can get the tool. Post 8. The thread may be useful too.

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    John
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    dantarbill
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    RE: LP 64 EQ & Compressor 2008/08/01 11:12:36 (permalink)
    .
    post edited by dantarbill - 2008/08/01 11:38:08

    Dan Tarbill
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