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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: Tue, 15 Nov 2011 06:04:25 +0100
User-agent: Mozilla/5.0 (X11; Linux x86_64; rv:7.0.1) Gecko/20110929 Thunderbird/7.0.1

On 11/15/2011 05:17 AM, Aere Greenway wrote:

I installed the version of Fluidsynth in your PPA, and found that it
definitely fixes the problem. Hooraaay!

Since Pedro also had a problem with this, it might make sense to release a 1.1.6 version with this bug fixed, to make sure it reaches 12.04.

I had some difficulty testing it because (I think) this development
version uses so much memory, that I couldn't run it on my 1 gigibyte RAM
machine without having it the only thing running, and not loading the
soundfont into the emu10k1's.

This is not expected. Did you run any further testing on this? Are you sure it was FluidSynth taking up all the memory, and nothing else? Did you run top / gnome-system-monitor to verify? What sizes are your soundfont files?

Or did you actually have some symptom (what symptom?) and just assumed it was due to lack of memory?

It was also an unpleasant surprise to find
that it took out the special configuration necessary for running JACK,
but I was able to put that back in manually, after uttering some choice

Ehh...I have a hard time believing that this could be FluidSynth's fault.

I highly recommend that this particular fix be included in the Ubuntu
11.10 release, due to the severe degradation in performance and sound
quality of Fluidsynth that is in that release, without the fix.

This fix is only relevant for low-polyphony settings, so it does not affect most people (who I assume never run into lack of polyphony). That said, I don't mind you putting effort into trying to do so - it's a good fix. The process for trying to do so is here: https://wiki.ubuntu.com/StableReleaseUpdates

// David

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