Well maybe something else is running on your mac that is degrading sound quality, can you run other audio applications like Live or those commercial apps without sound quality issues? I'm running my own compositions from the command line, but I also write them for realtime use, so I think if you lower the number of instances to 4 from 40 I bet you will also get better performance, that might just be a composition that's too huge to pump out in realtime.

On Fri, Sep 19, 2008 at 9:38 AM, peiman khosravi <peimankhosravi@gmail.com> wrote:

Thanks for the reply,

Actually my mistake sorry, I left out the x 2 after 1! so 2 GB ram :-)

So if doubling the memory makes the big difference then I'll do that. It would be nice to be able to run osx in unix mode without the desktop though!!!

Linux seems like the way to go... Maybe I'll have a csound only machine that runs on linux, when I can afford to put together a desktop computer.

Thanks
Peiman

2008/9/19 Brian Redfern <brianwredfern@gmail.com>

That's a lot of heavy lifting, I would try maxing out your ram though, 1 gig is pretty small if you're running the latest version of osx, if you're running a macbook pro you should be able to upgrade to at least 2 gigs if not 4 gigs of ram. I'm running the intel mac book pro with 4 gigs of ram and csound is working in realtime for me. I do tend to use Linux for realtime csound since I can use a really lightweight desktop like gnustep and then have 95% of system resources dedicated directly to csound.

On Fri, Sep 19, 2008 at 5:18 AM, peiman <peimankhosravi@gmail.com> wrote:

I have been thinking, in your experience what is the most reliable
platform/set-up to run csound (with blue). I'm not using csound for live
performance but I would like to have the ability to audition instruments
live as I'm composing, without getting glitches or freezes. Right now after
about 40-50 instances of an instrument that uses oscil3 x 2 (also used for
envelope control) and pretty large tables for good resolution (on csound64,
osx, powerbook pro) I get nasty glitches and have to increase buffer size up
to 4096 or more. There is no way of decreasing the number of notes as I'm
using the score for additive synthesis. Of course I understand that I'm
being demanding and again I'm not looking for realtime stability on stage,
but is there a better set-up/platform that can handle this? What is a good
buffer size setting on an osx intel laptop (I have 1GB RAM)?

Has someone done a test as to how much RAM and what set-up is needed for x
number of high precision oscillators to run smoothly on different platforms?

Thanks
Peiman

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