Lately, I've been reading Csound lit about how, in circumstances
like this, setting the k-rate to be the same as the sample (or audio)
rate is being used as a solution. 

Where:   sr = 44100
         kr = 44100
         ksmps = 1

Make sure of the ability of your buffers to deal with that 
rate for both audio and MIDI simultaneously. 
Also, find a happy medium for idur = p3, a slight adjust may be 
nedded. I've been seeing more of this sort of solution lately.

Also, 'filter' or mask the MIDI data. Turn-off any MIDI functions
in your receiver device that you're not using. This will cut down 
on data neede to be processed and the processing required. Keep 
MIDI cables short to minimum length and don't daisy chain
devices, use a star hook-up configuration.

-- Partev   







--- mpm@alumni.caltech.edu wrote:

From: Michael Mossey 
To:  csound@lists.bath.ac.uk
Subject: [Csnd] real time midi optimization
Date: Sat, 01 Sep 2007 11:53:23 -0700

Hello, I'm trying to use real-time midi. I have it working, but I have 
to set the buffer sizes to -b512 -B2048 which is a bit more latency than 
I would like. My orc is

---------------------------
sr=44100
kr=4410
ksmps=10
nchnls=2

;i1  time  dur  amp
instr 1
idur = p3
icps cpsmidi
print icps
aout   oscili 1, icps, 1
   outs aout * 1000, aout * 1000

endin
--------------------------------

and my sco is

f1 0 4096 10 1
i1 0 120 1 1

---------------

My system is a Core 2 Duo 1.8 GHz, sound card is M-audio Audiophile 
24/96. 1GB ram. Running Windows XP. Using Csound version 5.

How can I improve latency?

-Mike
-- 
Send bugs reports to this list.
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_____________________________________________________________
Netscape.  Just the Net You Need.

I'm not sure what you're suggesting?

If ksmps = 1 it wouldn't matter what the buffer size would.  The  
overhead of using ksmps = 1 is certainly not ideal for realtime  
performance.  I would set ksmps to at least 10 or 20 .. if not much  
larger (100 ...  400)

Also - what do you mean by ... idur = p3, slight adjust?

greg

On Sep 1, 2007, at 3:53 PM, Partev Barr Sarkissian wrote:

> Lately, I've been reading Csound lit about how, in circumstances
> like this, setting the k-rate to be the same as the sample (or audio)
> rate is being used as a solution.
>
> Where:   sr = 44100
>          kr = 44100
>          ksmps = 1
>
> Make sure of the ability of your buffers to deal with that
> rate for both audio and MIDI simultaneously.
> Also, find a happy medium for idur = p3, a slight adjust may be
> nedded. I've been seeing more of this sort of solution lately.
>
> Also, 'filter' or mask the MIDI data. Turn-off any MIDI functions
> in your receiver device that you're not using. This will cut down
> on data neede to be processed and the processing required. Keep
> MIDI cables short to minimum length and don't daisy chain
> devices, use a star hook-up configuration.
>
> -- Partev   
>
>
>
>
>
>
>
> --- mpm@alumni.caltech.edu wrote:
>
> From: Michael Mossey 
> To:  csound@lists.bath.ac.uk
> Subject: [Csnd] real time midi optimization
> Date: Sat, 01 Sep 2007 11:53:23 -0700
>
> Hello, I'm trying to use real-time midi. I have it working, but I have
> to set the buffer sizes to -b512 -B2048 which is a bit more latency  
> than
> I would like. My orc is
>
> ---------------------------
> sr=44100
> kr=4410
> ksmps=10
> nchnls=2
>
> ;i1  time  dur  amp
> instr 1
> idur = p3
> icps cpsmidi
> print icps
> aout   oscili 1, icps, 1
>    outs aout * 1000, aout * 1000
>
> endin
> --------------------------------
>
> and my sco is
>
> f1 0 4096 10 1
> i1 0 120 1 1
>
> ---------------
>
> My system is a Core 2 Duo 1.8 GHz, sound card is M-audio Audiophile
> 24/96. 1GB ram. Running Windows XP. Using Csound version 5.
>
> How can I improve latency?
>
> -Mike
> -- 
> Send bugs reports to this list.
> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
>
>
>
>
> _____________________________________________________________
> Netscape.  Just the Net You Need.
> -- 
> Send bugs reports to this list.
> To unsubscribe, send email to csound-unsubscribe@lists.bath.ac.uk
>