Re: [fluid-dev] Re: lost connection to Jack server (svn Rev 243, over the weekend)

[David Henningsson]

jimmy wrote:
> --- On Mon, 10/19/09, address@hidden <address@hidden> wrote:

First - thanks for helping out with the much needed testing!

> I tried again, same midi file at "http://mmacdonald.com/midi/XG/Conquistador 3K 
> MM.MID".  Note that this is a fairly busy, quick tempo/pace.

Out of curiosity, you mentioned aplaymidi before. Do you play the song 
via aplaymidi and alsa-seq drivers, or do you supply the midi file to 
fluidsynth on the command line?

> As I type this, I use the mouse to drag the scroll bar in a GUI text editor, 
> with the midi song playing in the background, I definitely hear the jitters 
> during the mouse drag.  Not surprising, just mention it here anyway.

Are XRUNs reported from Jackd? In that case, it is probably not 
FluidSynth's fault. Is jackd and fluidsynth running under rtprio?

> Unison.sf2 seems to give the least noise/jitters for me.  It is also the 
> smaller soundfont compare to the ones listed below.

Interesting. I've heard that before, that smaller soundfonts are less 
CPU intensive, my only theory is that this has to do with the CPU cache, 
with more samples, there'll be more cache misses. This seems a little 
bit far-fetched though (not only for the CPU, ha ha). Would be 
interesting to know if prefetch instructions could improve the situation.

// David