I know this is a late reply, but I never tire of learning more about the sound system in Squeak. Maybe Stéphane could wite some swiki articles on that subject. It would be extraordinarily useful to a lot of us experimenters. 

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> On Jun 6, 2021, at 23:43, Marcel Taeumel <marcel.taeumel at hpi.de> wrote:
> 
> 
> Hi Stéphane.
> 
> > From a musical perspective, there is always some reverb. Nobody plays a
> > concerto in an anechoic chamber. So you can think of the default reverb
> > setting as the sound of the Squeak room itself - when just playing
> > sounds like, for a game, it is nicer to have one. And when we need
> > Squeak to behave like an anechoic chamber, we can just turn the reverb off.
> 
> Aha! Thanks for this explanation. :-)
> 
> Best,
> Marcel
>> Am 31.05.2021 09:36:10 schrieb Stéphane Rollandin <lecteur at zogotounga.net>:
>> 
>> > FMSound brass1 play 
>> > 
>> > And I have to tell that, both with default and without reverb, I can hear the abrupt end of the sound very clearly. 
>> Well without reverb there is a definitely non-musical harsh noise. With 
>> reverb on, the sound still does stop abruptly, but more musically. This 
>> makes all the difference to me. 
>> 
>> But I do agree that overall the FMSounds releases are not graceful :) 
>> 
>> 
>> > IMHO it does not make a large difference, except for the fact that a pure tone should not have any reverb by definition. 
>> 
>> A FMSound is not a pure tone. A pure tone is a sinusoid, which ends with 
>> a clear click (a very non-musical noise). 
>> 
>> Now anyway the reverb is used only when playing a sound, not when 
>> processing it - here it is not part of the FMSound itself: you will not 
>> see the reverb in the waveform or the spectrogram. 
>> 
>> From a musical perspective, there is always some reverb. Nobody plays a 
>> concerto in an anechoic chamber. So you can think of the default reverb 
>> setting as the sound of the Squeak room itself - when just playing 
>> sounds like, for a game, it is nicer to have one. And when we need 
>> Squeak to behave like an anechoic chamber, we can just turn the reverb off. 
>> 
>> > 
>> > I am not an expert in sounds at all, but couldn't it be a more elegant solution to adjust the envelopes of the problematic sounds instead and to extend their release phase? 
>> > 
>> > I changed #brass1 like this: 
>> > 
>> > | snd p env | 
>> > snd := FMSound new modulation: 0 ratio: 1. 
>> > p := OrderedCollection new. 
>> > - p add: 0 at 0.0; add: 30 at 0.8; add: 90 at 1.0; add: 120 at 0.9; add: 220 at 0.7; add: 320 at 0.9; add: 360 at 0.0. 
>> > + p add: 0 at 0.0; add: 30 at 0.8; add: 90 at 1.0; add: 120 at 0.9; add: 220 at 0.7; add: 320 at 0.9; add: 440 at 0.0. 
>> > snd addEnvelope: (VolumeEnvelope points: p loopStart: 4 loopEnd: 6). 
>> > 
>> > p := OrderedCollection new. 
>> > p add: 0 at 0.5; add: 60 at 1.0; add: 120 at 0.8; add: 220 at 0.65; add: 320 at 0.8; add: 360 at 0.0. 
>> > env := Envelope points: p loopStart: 3 loopEnd: 5. 
>> > env target: snd; updateSelector: #modulation:; scale: 5.0. 
>> > snd addEnvelope: env. 
>> > 
>> > (snd setPitch: 220.0 dur: 1.0 loudness: 0.5) play 
>> > 
>> > The only difference is that I moved the last envelope point 80 ms to the right. I can't hear any "plop" now any longer. 
>> 
>> Right, but the duration of the sound cannot be considered to be one 
>> second anymore - it is much closer to 0.9 seconds (where it was around 
>> 0.95 before, so already too short). 
>> 
>> See the attached pictures: SoundElementEditor1.png is the current 
>> waveform, SoundElementEditor2.png the one you propose. See how it ends 
>> prematurely? 
>> 
>> I would say 390 at 0.0 for the last point is better. It still sounds good, 
>> but does not shorten the sound as much. 
>> 
>> For composition, it is important that a sound lasts as long as it claims 
>> to last. Else, the phrasing articulations cannot be right - you would 
>> hear a staccato when a legato is asked for. 
>> 
>> So a sound release should happen after the sound nominal duration (which 
>> is not the case at the moment) 
>> 
>> 
>> > My proposal is to turn off reverb in the SoundPlayer by default and to adjust the most problematic FMSounds manually instead. What do you think? :-) 
>> 
>> My counter-proposal would be to keep the default reverb and give it the 
>> settings it has in muO :) 
>> 
>> And then, if you want to tweak some sounds, have their nominal duration 
>> respected. So I would vote for having releases after nominal duration, 
>> but this means a mechanism would then be needed to differentiate the 
>> nominal duration from the duration you get from the raw number of samples. 
>> 
>> This mechanism exists in muO. 
>> 
>> In fact it is rather difficult for me to give any specific piece of 
>> advice about how music should be handled in Squeak proper, because my 
>> own way to do this has been to implement a much vaster and deeper 
>> framework where many different perspectives work together. Not to say it 
>> is perfect, but it is thorough - one thing lead to another and I could 
>> talk for hours... 
>> 
>> 
>> Best, 
>> 
>> Stef 
>> 
> 
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