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Re: [fluid-dev] Major degradation in sound quality & cpu usage going fro

From: David Henningsson
Subject: Re: [fluid-dev] Major degradation in sound quality & cpu usage going from Ubuntu 11.04 to 11.10
Date: Mon, 07 Nov 2011 11:43:23 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1

On 11/05/2011 09:12 PM, Aere Greenway wrote:
David, et al:

I have not heard back since I reported on performing the test you asked
me to run.

I noticed on the website that there are "0 new bugs".

What process do I need to go through to have this problem evaluated as
to whether it is officially a 'bug' or not?

To me, this problem kills my future prospects. The music education
package I am poised to put out depends on FluidSynth (actually Qsynth,
which uses it).

I could distribute my package, and people could get all excited about
it, but when they installed it themselves (instead of using what comes
with the package), they would find that the installed version won't even
play the demo-music, even on a fast machine.

What I had to go through to compile the older version on the current
level is not something I could expect a new user of Linux to do.

There is no path forward if this cannot be fixed. But of course, those
are the chances I take when I attempt to develop something.

It would be very helpful if I had some indication of whether or not this
problem will be addressed, or even looked at.

I am willing to supply MIDI and audio files you could test it with, and
verify any fixes.

Please consider the idea that what I have been doing in the past to
avoid under-runs, by configuring fewer simultaneous voices (setting the
polyphony parameter to 64, or even 48 on a slower machine), may be a
more elegant solution than what has apparently been done in the latest
release (probably to address that same problem of under-runs).

I think my planned product could make a big difference in the way people
learn to play (and compose) music, and I am really hoping FluidSynth can
be a part of it. It certainly has been a rock-solid, dependable
component up to now.


Aere Greenway

Hi Aere,

I've been on travel with limited time/possibility to help you. In addition, the rebuild I asked you to do was harder than I expected.

But now I'm home again, and here's what I've done now:

I've taken the 1.1.5 package, and added the patch I committed as r435. This is because you said something earlier about sound working up to the polyphony limit. I then uploaded the source package to a ppa: https://launchpad.net/~diwic/+archive/fluidsynth-test

The ppa probably has finished building when you read this, so can you download/install the packages from there and see if it resolves your problem? Thanks!

// David

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