Re: [fluid-dev] Proposal: FluidSynth tester program

[Aere Greenway]

David, and all:

Sorry about the Star Trek quote, but "You truly are a miricle-worker!"

The release-candidate fluidsynth played my two test pieces on my 455 megahertz machine without error.  

I followed your instructions, re-configuring and re-building fluidsynth (and re-installing).  

At first the build aborted, needing some jackd libraries I had removed to allow qjackctl to run.  

But I re-did the build dependencies, and the build went okay.  

I re-installed, and did the test you gave me to see that the new version was in-place (it was).  

Again, qjackctl would not run (it crashed, as before).  

I completely removed jackd, jackd2, and qjackctl.  

I then re-installed jackd, jackd1 (I asked for it specifically, since that is what fluidsynth seems to prefer), and qjackctl.  

But this time, qjackctl still failed to initialize, but with a different error symptom.  

I completely removed jackd, jackd1, and qjackctl, and re-installed jackd, jackd2, and qjackctl.  This time, it required the removal of libjack-0 and libjack-dev.  

But this time, qjackctl did succeed in initializing.  

I ran the tests, with results as follows:

Ran test 1 "Impromptu 2 - Sunlight on the Water":
Played perfectly - no under-runs.  Qjackctl RT-percentage hovering at 67%.  

Ran test 2 "Impromptu - Forest Breezes":
Played perfectly - no under-runs.  Qjackctl RT-percentage hovering at 68%.  

Re-ran test 2, but with the reverb check-box of Qsynth selected.  
Played most of the way through perfectly, but got a single under-run about 3/4 the way through. 
Qjackctl RT-percentage hovering at 83%.  

TEST CONCLUSIONS:

The testing was successful with the release-candidate fluidsynth, on a 455 megahertz machine running Xubuntu 12.04.  

Where it has been stated that there are no fluidsynth dependencies on jack, I think you should re-examine that claim, based on the problems I encountered.  

This time, I have all of my build listings, as well as a log of the many problems I had to work through to get qjackctl to work.  

Please examine the attached text file, as an aid in determining if there really is a jack dependency in fluidsynth.  


Sincerely,
Aere

On Sat, 2012-08-04 at 19:04 +0200, David Henningsson wrote:
> On 08/03/2012 03:39 PM, S. Christian Collins wrote:
> > Even on my Intel Core i7 (2.8 GHz quad-core) I am able to get Fluidsynth
> > to cause xruns when playing really fast on a stereo piano sound that I
> > have (voice polyphony at 256).
>
> After some searching I believe I found what causes the performance to drop.
>
> I've just committed a patch that sets the default build type to 
> RelWithDebInfo (if someone prefers another default, let me know).
>
> As a test, could you rerun with the -DCMAKE_BUILD_TYPE=RelWithDebInfo, 
> so that the build now looks like the below, and see if it improves 
> performance? Thanks!
>
> mkdir build
> cd build
> cmake .. -DLIB_SUFFIX= -DCMAKE_BUILD_TYPE=RelWithDebInfo
> make
> sudo make install
> sudo ldconfig
>
> // David

-- 

Sincerely,
Aere

FluidSynth-Testing-20120804.txt
Description: Text document