Hello Christian, On Fri, Jun 24, 2016 at 1:24 AM, S. Christian Collins < s_chriscoll...@hotmail.com> wrote:
> On 06/23/2016 08:28 PM, Element Green wrote: > > There are a bunch of default modulators which cause SoundFont instruments > to respond to some of the defined MIDI controllers as expected (volume > control, pitch bender, etc). When attempting to modify one of these, you > have to first define a modulator which reverses the effect of the default > modulator (adds a value with the opposite sign). Then you can define a new > modulator which has the desired effect, otherwise both modulators will be > active (the default one and the user defined one). > > > Actually, the way to disable a default modulator is to recreate the > modulator but set its value to 0 (not a negative, canceling value). If you > want to modify the default modulator do use a different amount (while > keeping the same curves), simply recreate the default modulator and then > give it a different amount value. No need to cancel the modulator and then > re-add it in this case. However, if you wanted to, for example, change the > default velocity-to-attenuation modulator curve to be linear instead of > concave, you would have to first cancel the modulator (create it and set > its value to 0) and then create a new modulator with the different curve. > > So in short, to disable a default modulator: create it with an amount of 0. > To modify a default modulator: create it with the desired amount. > > Its been a while since I was looking at this. After reading over the spec, it sounds like you are correct. This seems contrary to some of the behavior I have observed in Swami in particular. So it may be that there are some implementation issues (either in Swami and/or FluidSynth). Needs some testing. Perhaps my recollection of previous testing is not so good and it could be that it is just fine. > Swami really needs to show these default modulators and allow for easily > negating them. This is on my TODO list. Otherwise its rather complicated > figuring out what the default modulators are and adding one which negates > it's effect (see section 8.4 on page 41 of the SoundFont 2.4 spec > http://freepats.zenvoid.org/sf2/sfspec24.pdf). > > > Swami <http://synthfont.com/index.html> now has support for modulators. > You might want to check out the way that they are handling this, although > the way that Vienna SoundFont Studio does it is a more elegant solution (I > sent you a video about this somewhat recently). Kenneth Rundt, the author > of Swami has also created an info page on modulators > <http://synthfont.com/modulators.html> that is a good reference. > > I guess you meant SynthFont, since I'm the author of Swami ;-) Ha ha. > -~Chris > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev > > Cheers! Element
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