Hmm, reading back over your original problem description, I think the first question should be whether the voice is really continuing or not. It could actually be one of the effects, such as reverb, which is causing the sound to extend on for a long time. Try turning off the reverb and chorus units to see if that "fixes" the problem. Each instrument has its own reverb send calculation, so you might not notice this until an instrument has the reverb setting above a certain level.
Element On Thu, May 19, 2016 at 7:36 PM, Ien Cheng <i...@alum.mit.edu> wrote: > Thanks - > > Yeah, I'm not getting any problems with the files in MuseScore, which I > know uses FluidSynth. > > The context I'm getting the problem is in an Android app -- using this > fluidsynth-android <https://bitbucket.org/kunstmusik/fluidsynth-android> > repo. I wonder if it has something to do with the lower processing power of > the phone? > > --Ien > > On Wed, May 18, 2016 at 12:53 PM, Element Green < > elem...@elementsofsound.org> wrote: > >> Hello Ien, >> >> I got your samples you sent me, for reference: >> FluidR3 GM2-2-0-52-Ahh Choir.sf2 >> 8bitsf-0-0-PIANO 1.sf2 >> >> With the choir instrument, the default release on the global instrument >> zone is 3 seconds. The velocity of the key being pressed determines the >> release time of the volume envelope, as set by the Preset Zones. From 3 >> seconds (maximum velocity) to 1.8 seconds (lowest velocity). >> >> The 8 bit piano sound has a release of a half a second. >> >> Both of these seem to work as expected (tested in Swami and the >> fluidsynth shell with noteon/noteoff commands). In the problem scenario >> you are talking about, how are you sending notes to FluidSynth? Are you >> playing a MIDI file or pressing keys on a keyboard or something else? >> >> Cheers. >> >> Element >> >> >> On Wed, May 18, 2016 at 10:23 AM, Ien Cheng <i...@alum.mit.edu> wrote: >> >>> HI Element Green! >>> >>> Thanks for your continued help with this. Much appreciated. >>> >>> As requested, attached at two soundfonts showing this problem. >>> >>> Let me know if I can provide anything further to help figure this out! >>> >>> --Ien >>> >>> >>> ---------- Forwarded message ---------- >>> From: Element Green <elem...@elementsofsound.org> >>> Date: Wed, May 18, 2016 at 11:56 AM >>> Subject: Re: [fluid-dev] Problem with certain "loud" soundfonts not >>> stopping after note off >>> To: FluidSynth mailing list <fluid-dev@nongnu.org> >>> >>> >>> Hello Ien, >>> >>> In such a situation I would load up the SoundFont into an editor (such >>> as Swami) and have a look at the release time for the particular instrument >>> you are using. Note that the calculation of the release time is based on >>> the release value of the matching instrument zone multiplied by the release >>> multiplier in the preset. If you could personally send me the SoundFont or >>> let me know how I could obtain it, I would be happy to check this for you >>> (just let me know what which preset and note you are playing). >>> >>> Best regards, >>> >>> Element Green >>> >>> >>> On Wed, May 18, 2016 at 9:35 AM, Ien Cheng <i...@alum.mit.edu> wrote: >>> >>>> Hi Element Green - >>>> >>>> Thanks for your quick reply! >>>> >>>> It could well be something to do with release time. However, the sound >>>> is definitely continuing indefinitely. Perhaps the sounds aren't trailing >>>> off properly to go below the perceptible threshhold? Are there any settings >>>> I can play with to tune this behavior to solve this problem? >>>> >>>> --Ien >>>> >>>> On Wed, May 18, 2016 at 11:17 AM, Element Green < >>>> elem...@elementsofsound.org> wrote: >>>> >>>>> Hello Ien, >>>>> >>>>> FluidSynth does some pre-calculations on sample data to determine when >>>>> the sound becomes "imperceptible" ("reaches the noise floor"). I'm not >>>>> really familiar with this code and have often wondered how well it works. >>>>> For example, in the case of Swami, I don't believe I'm pre-calculating >>>>> these values and I've questioned whether this is working right (in the >>>>> case >>>>> of Swami's use of FluidSynth at least). At any rate, if an instrument has >>>>> a long release time, FluidSynth will try to optimize things to turn off >>>>> the >>>>> voice when it is no longer "perceptible". It will also prioritize voices >>>>> to terminate if it runs out of the allocated polyphony. It seems you are >>>>> saying that a sound continues past the note off though, which likely has >>>>> to >>>>> do with the instrument's release time. Are you certain that FluidSynth is >>>>> maintaining the voice past the end of the designated release interval? >>>>> >>>>> Best regards, >>>>> >>>>> Element Green >>>>> >>>>> On Wed, May 18, 2016 at 9:07 AM, Ien Cheng <i...@alum.mit.edu> wrote: >>>>> >>>>>> Hi everyone - >>>>>> >>>>>> I'm seeing an odd problem where the synth is not stopping the sound >>>>>> after note off with certain "loud" soundfonts. Specifically, with the >>>>>> standard GM grand piano soundfont, everything works great, notes on and >>>>>> notes off as expected. >>>>>> >>>>>> Switch to a soundfont that has a sharper or fuller sound (like a 8bit >>>>>> arcade sound or a full choral ahh sound) and the synth doesn't turn off >>>>>> the >>>>>> notes -- or it sounds like the echo or tail of the sound just continues >>>>>> indefinitely even after the note off. >>>>>> >>>>>> I notice that if I reduce the gain, the problem goes away. >>>>>> >>>>>> Is this some kind of flooding or other problem? >>>>>> >>>>>> Apologies if I'm not asking correctly or with the right terminology! >>>>>> Any help or tips appreciated. >>>>>> >>>>>> --Ien >>>>>> >>>>>> _______________________________________________ >>>>>> fluid-dev mailing list >>>>>> fluid-dev@nongnu.org >>>>>> https://lists.nongnu.org/mailman/listinfo/fluid-dev >>>>>> >>>>>> >>>>> >>>>> _______________________________________________ >>>>> fluid-dev mailing list >>>>> fluid-dev@nongnu.org >>>>> https://lists.nongnu.org/mailman/listinfo/fluid-dev >>>>> >>>>> >>>> >>>> _______________________________________________ >>>> fluid-dev mailing list >>>> fluid-dev@nongnu.org >>>> https://lists.nongnu.org/mailman/listinfo/fluid-dev >>>> >>>> >>> >>> _______________________________________________ >>> fluid-dev mailing list >>> fluid-dev@nongnu.org >>> https://lists.nongnu.org/mailman/listinfo/fluid-dev >>> >>> >>> >> >
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