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
>>>>
>>>> _______________________________________________
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>>>> fluid-dev@nongnu.org
>>>> https://lists.nongnu.org/mailman/listinfo/fluid-dev
>>>>
>>>>
>>>
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>>>
>>
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