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  • Altiverb

    S
    S
    Hi

    I just got altiverb and so I opened DP instantiated a trumpet from VI and put a aux channel in with atliverb. AMAZING!!!!!

    But here is my question, problem. I read Kaufmans article about using 4 different altiverbs set to different depths to give the overall stage sound. I noticed that with just a trumpet and one altiverb it was using 15% CPU and I am on a MAC PRO 8 core!

    I decided to test how much 4 altiverbs would take, so I added 3 extra aux tracks and put altiverb on them, with kjust a VI trumpet and 4 aux channels with altiverb my CPU was now at 70% and I have 9GB RAM installe4d and it said there was only 1GB free!!!

    Is this typical of other users findings? How do you cope with 4 altiverbs and more than one VI instrument. Say I wanted to have a small orchestra and 4 altiverbs, this prob would be possible?

    ANy help would be great!!!
  • H
    H
    You can use many instances of AV if you want. Be it probably complicates things more than it makes easy.

    Besides which there are a couple of different ways you can run AV.

    1. Is an instance on every channel. With this you are using the Speaker placement and early reflections part of AV .. but not the Tail. And a master reverb on the master channel provides the tail.

    2. As a Send / Return effect. Allowing you to send as much of the signal as you like to a signal reverb .. thus saving much CPU resources. Doing this way you set the reverb IR to 100%, but frankly this is fiddly .. and really hard to correct if it goes wrong.

    3. Depth Instances. You set 4 depth layers to assign your orchestra to to generate the feeling of 3D depth. In this case you are also using 100% IR .. but you are moving the Speakers around to simulate the required depth. This was is the easiest .. but you have to use the right kind of IR or it will sound horrid.

    So this then is why 4 AV's are the good middle ground. Gives you control over the overall room and doesn't kill your PC / Mac to do it.

    But as with all these things .. their are few rules regarding what you must do. Just what feels right to you.
  • K
    K
    As far as the CPU usage goes, that does seem excessive on an 8-core Mac. My dual quad-core G5 can handle at least 15 individual instances of Altiverb, with pre-delay and tail turned "on" on each instance.

    Something helpful: under presets, there's "orchestral" -- these are Maarten Spruijt's custom-created orchestral presets -- you should give them a try. They're very good for instrument positioning on stage, to give you that effect of a 3D orch.

    kerry
  • S
    S
    last edited
    last edited

    @hetoreyn said:

    You can use many instances of AV if you want. Be it probably complicates things more than it makes easy.

    Besides which there are a couple of different ways you can run AV.

    1. Is an instance on every channel. With this you are using the Speaker placement and early reflections part of AV .. but not the Tail. And a master reverb on the master channel provides the tail.

    2. As a Send / Return effect. Allowing you to send as much of the signal as you like to a signal reverb .. thus saving much CPU resources. Doing this way you set the reverb IR to 100%, but frankly this is fiddly .. and really hard to correct if it goes wrong.

    3. Depth Instances. You set 4 depth layers to assign your orchestra to to generate the feeling of 3D depth. In this case you are also using 100% IR .. but you are moving the Speakers around to simulate the required depth. This was is the easiest .. but you have to use the right kind of IR or it will sound horrid.

    So this then is why 4 AV's are the good middle ground. Gives you control over the overall room and doesn't kill your PC / Mac to do it.

    But as with all these things .. their are few rules regarding what you must do. Just what feels right to you.



    Hi

    I had read kaufmans article about using 4 instances to create the depth and it sounded great!!! When I used one altiverb it used 15% CPU which I thought was very high. Just as a test I decided to add 4 atliverbs so if i did the depth thing, I could see just how much CPU I would use. It jumped to 70%!!!

    I was just wondering what other users, such as yourself experienced when they use 4 altiverbs? Is your CPU as high as this?

    Thanks,
    Simon
  • B
    B
    You could always do offline processing, but nobody seems to want to do that these days...
  • J
    J
    A very low audio hardware buffer setting can make the CPU work a lot harder.

    Try raising your buffer setting.
  • S
    S
    last edited
    last edited

    @JWL said:

    A very low audio hardware buffer setting can make the CPU work a lot harder.

    Try raising your buffer setting.


    Hi

    Yes, I noticed that my buffer was at 256, so I set it to 512 and it did lower one altiverb to 12% CPU. Is this what other people experience?
  • A
    A
    Anyone run Altiverb on a slave with FX-Teleport with success? I've trier FX-T and it works pretty well but I'm wondering about the dungle etc..