But increasing -B will make the controls sluggish. I can't see why
Csound should perform worse on Linux than Windows and OSX.

At 18:19 13/01/2006, you wrote:
>Perhaps as Istvan suggested, it's the burping of the bigger pvoc buffers. 
>Maybe you can write a host app with a separate thread to enqueue audio 
>from Csound in Csound-sized blocks, and dequeue it in driver-sized blocks 
>and send it to the driver. If you let 5 or 10 Csound buffers build up in 
>the queue the dropouts should go away, but of course at a cost in latency. 
>Maybe increasing -B would do something similar.
>
>-----Original Message-----
> >From: Victor Lazzarini 
> >Sent: Jan 13, 2006 11:32 AM
> >To: csound-devel@lists.sourceforge.net
> >Subject: Re: [Cs-dev] Linux performance
> >
> >That's not actually a problem, as I can use plughw:0,0. The issue
> >was the train of dropouts I was getting even if the CPU was reasonably
> >at ease.
> >
> >I have been running other less heavy orchestras and the performance
> >seems OK, I was able to go down to -b8 -B80 running a phase vocoder
> >harmoniser with a GUI (I would get the occasional underrun if I start
> >clicking too much on other desktop items). There is no generally noticeable
> >latency.
> >
> >I'm surprised with the demix, I thought I'd be able to run it in that 
> machine.
> >
> >Victor
> >
> >At 16:20 13/01/2006, you wrote:
> >>If it's the sample format, it could be the low-level driver
> >>(manufacturer's driver, sound card). Try a different format. Are you
> >>trying float? Then try 16 bit int. Some cards only do certain sample rates
> >>also.
> >>
> >>Regards,
> >>Mike
> >>
> >>-----Original Message-----
> >> >From: Victor Lazzarini 
> >> >Sent: Jan 13, 2006 11:02 AM
> >> >To: csound-devel@lists.sourceforge.net
> >> >Subject: Re: [Cs-dev] Linux performance
> >> >
> >> >I tried -o dac:hw:0 and I could not run it, as csound
> >> >says "unable to set sample format requested",
> >> >whereas with -o dac:plughw:0 it runs as before.
> >> >
> >> >The same orc runs on my Windows machine OK (with
> >> >-b1024).
> >> >
> >> >What kernel are you running? Do you have a low-latency patch?
> >> >
> >> >Victor
> >> >
> >> >At 15:50 13/01/2006, you wrote:
> >> >>On Friday 13 January 2006 16:40, Victor Lazzarini wrote:
> >> >>
> >> >> > I used the default outdevice (-odac) and anything from
> >> >> > -b64 -B512 up to -b2048 -B4096
> >> >>
> >> >>Try using -o dac:hw:0 with -+rtaudio=alsa (-o dac:hw:1 for
> >> >>the second card, etc.). Also, PVOC with a large FFT size may
> >> >>not be friendly to low latency real time audio, due to the
> >> >>uneven CPU usage.
> >> >>
> >> >>
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> >> >Victor Lazzarini
> >> >Music Technology Laboratory
> >> >Music Department
> >> >National University of Ireland, Maynooth
> >> >
> >> >
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> >Victor Lazzarini
> >Music Technology Laboratory
> >Music Department
> >National University of Ireland, Maynooth
> >
> >
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Victor Lazzarini
Music Technology Laboratory
Music Department
National University of Ireland, Maynooth 



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