All: Just a quick note of caution on this subject.
Sequence editors give you control of the pan (left/right) position of each MIDI track. Usually it is used to initially position the instruments of the ensemble, but I have (as a matter of novelty) moved an instrument from one side to the other while it is playing (as if the player is walking away). I have also used it to have one track totally one instrument, and the other track totally the other instrument (though that doesn't sound very good in earphones). I would be dismayed to find that Fluidsynth/Qsynth had taken the pan capability over to itself, and no longer allowed the sequence editor to control it. That being said, I know there are voices (such as on my Yamaha S90-es) that use the pan (stereo harp, for example). - Aere On Tue, 2012-06-19 at 07:58 +0200, David Henningsson wrote: > On 06/18/2012 12:19 AM, Antoine Schmitt wrote: > > Hi all, > > I'm wondering about the usage of fluidsynth to pan stereo sounds. > > > > The way I integrate sounds samples in fluidXtra (pluging for Adobe > > Director) without using sfonts is by creating a ramsfont preset which > > contains the sample. That was actually the first reason to introduce the > > ramsfont in fluidsynth. > > > > I have a problem for panning stero sounds using this method. WHat I do > > for stereo sounds is creating a ramsfont preset with two samples > > attached to the preset, one fully pre-panned to the left and the other > > one fully pre-panned to the right, using generators : > > > > fluid_ramsfont_izone_set_gen(ramsf, bank, presetNum, sampleL, GEN_PAN, > > -500.); > > fluid_ramsfont_izone_set_gen(ramsf, bank, presetNum, sampleR, GEN_PAN, > > 500.); > > > > This is fine until I try to dynamically pan the preset. If I fully pan > > it to the left for exemple, it adds -500 to the pre-pan on both samples, > > and the left sample gets panned to -1000, which gets maxed to -500, and > > the right sample gets panned to 0. This gives a preset that sounds 50% > > panned to the left, and not 100% to the left as one would expect. > > > > I'm not sure, first of the right behavior for panning on stereo sounds, > > and second on the best way to do it either using fluidsynth API as it > > is, if possible, and if not how to modify fluidsynth to do the right > > thing, using for example, the FLUID_SAMPLETYPE_RIGHT and > > FLUID_SAMPLETYPE_LEFT values for the sampletype member of the > > _fluid_sample_t struct, which are not used anywhere in fluidsynth actually. > > > > Any idea ? > > Thanks > > Hmm, interesting problem. > > With the disclaimer that I have not gone to the SF2 spec to research > this, what is actually the desired behaviour here, is it > > 1) Have a mix of the left and right samples both sounding in the left > channel, or > > 2) Have only the left sample sounding in the left channel (the right > panned sample being silent/unhearable)? > > // David > > > _______________________________________________ > fluid-dev mailing list > fluid-dev@nongnu.org > https://lists.nongnu.org/mailman/listinfo/fluid-dev -- Sincerely, Aere
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