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Re: [fluid-dev] Equalization

From: Element Green
Subject: Re: [fluid-dev] Equalization
Date: Tue, 1 Mar 2016 17:04:29 -0700

I'm not sure how you are currently obtaining FluidSynth, which would probably determine where to start.

Here is a likely semi-outdated general guide on building FluidSynth:

If you are using the autconf ./configure script, then you would pass "--enable-ladspa" switch to the configure script, like so:
./configure --enable-ladspa

The cmake build system is easier in my opinion, but again, I'm not sure how you are building for your platform, so it may or may not be easier.  With cmake, you just enable LADSPA by enabling the enable-ladspa option.  CMake has several front ends.  I use the "ccmake" interactive curses terminal interface.  Basically:
cd /path/to/fluidsynth/sources/
mkdir build
cd build
ccmake ..
c            # To configure FluidSynth - install development libraries as needed and keep pressing "c" after installing each one, until it succeeds
Find the enable-ladspa option and switch it to ON
c            # Hit 'c' again to configure after changing options
g            # g generates the build files
q            # Quit ccmake
make     # Build FluidSynth

Maybe that helps?

Best regards,


On Tue, Mar 1, 2016 at 4:52 PM, Srijan Deshpande <address@hidden> wrote:
Thank you! Could you please point me to a guide of some sort on building fluidsynth with ladspa support?


On Wednesday, March 2, 2016, Element Green <address@hidden> wrote:
Hello Srijan,

FluidSynth has LADSPA support, though I don't think it is built by default (you'll need to turn it on during the build configuration).  You should be able to find a LADSPA equalization plugin.  I would think that would be the easiest way to go if you are using it in an embedded environment.

See "help ladspa" from within the FluidSynth shell, after you've built support for it.

Best regards,

Element Green

On Tue, Mar 1, 2016 at 10:39 AM, Srijan Deshpande <address@hidden> wrote:

Does fluidsynth have some kind of EQ that I can apply to the sound output? If not, what is the best way to add EQ to the sound output by fluidsynth? I'm using it on a raspberry pi model 2 B with a hifiberry DAC+ soundcard. Would alsaequal be the best way to go, or would it introduce latency?


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