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Re: [fluid-dev] Fluidsynth instrument attenuation

From: S. Christian Collins
Subject: Re: [fluid-dev] Fluidsynth instrument attenuation
Date: Wed, 21 Jul 2010 00:19:28 -0500
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Preset/Instrument level attenuation attenuates 0.4 dB for every 1 dB that you specify (according to the values reported by Vienna Soundfont Studio 2.xx).  The reason for this behavior is compatibility... this is how Creative/E-MU designed their synth engines, and the thousands of SoundFonts out there expect this behavior.  You can read more details about this in this PDF file, which was my proposed list of changes for FluidSynth 1.0.9.


On 07/19/2010 11:28 AM, Edenyard wrote:
I'd be grateful if someone here could kindly unravel a bit of a mystery in Fluid Synth for me regarding instrument attenuation.

I've been making a new organ soundfont using samples from the excellent new Silver Octopus romantic set and I'm now tryingto get the right balance between the various ranks by adjusting the instrument attenuation for each instrument. I've found quite a bit of conflicting information in different places about the relationship between what the attenuation setting is set at and what actual attenuation Fluid Synth (and others) actually apply to the instrument.

Also, it seems as though the relationship has changed sometime over the last few releases. I've tried googling and get presented with quite a lot of programming type stuff that unfortunately leaves me rather in the dark as a non-programmer.

So - in a nutshell, is 10dB of attenuation as set going to give me 10dB of actual attenuation for my instrument, or is it something else? Also, which version of FS should I be using to get the right answers?

In case it matters, I'm using Jorgan in conjunction with FS 1.0.6 on a Linux Slackware system running a 2.4 kernel - although this may get updated as part of the mods I'm doing.

Sorry if this question is really trivial, but it's stumping me at present! Thanks in anticipation for any help.


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