Re: [Rosegarden-user] Synths: QSynth vs. Fluidsynth DSSI

[jimmy <wg...@ya...>]

--- On Wed, 4/15/09, Al Thompson <big...@sb...> wrote:

> From: Al Thompson <big...@sb...>
> Subject: Re: [Rosegarden-user] Synths: QSynth vs. Fluidsynth DSSI
> To: "jimmy" <wg...@ya...>
> Cc: ros...@li...
> Date: Wednesday, April 15, 2009, 2:25 AM
> jimmy wrote:
> > 
> > 
> > Have you tried to see how much CPU each of those
> softsynth is using
> > up for that somg?  You have a way to show CPU
> usage?  "top", "htop",
> > or "ksysguard" should give you some idea.  htop
> will show CPU usage
> > per core.
> 
> I had a little spare time, so I played with this a
> bit.  Not
> surprisingly, the most CPU usage was during fairly quick
> MIDI passages,
> but the heaviest CPU use wasn't when I unmuted the soft
> synths, it was
> 'rosegardensequencer.'  By a wide margin.
> 
> However, what dwarfed even that was when I connected (in
> the MIDI device
> manager) a MIDI output to my hardware MIDI port, then
> 'rosegardensequencer' CPU use went through the roof. 
> That's when I
> started having problems.
> 
> Any idea why sending MIDI data to an external hardware port
> would cause
> that?  It's a USB to MIDI MIDISport Uno 1x1.
> 
> 
> > 
> > I think you are over-taxing your CPUs,
> 
> Just 1.  Intel 2.6GHz P4.
> 
> 
> > or at least the soundcard
> > resources.
> 
> 
> Since all I'm using the soundcard for is the final DAC,
> shouldn't it use
> the same amount of resources whether I'm sending the
> "audio" of a single
> guitar track to it, or an entire mix?  I'm not using
> any internal
> soundcard synthesizers, and my soundcard doesn't have a
> MIDI port.  This
> is about the same numbers I get when I'm using my external
> USB sound device.
> 
>