[sdiy] How does your sound perception change while you're falling asleep?

[ColinMuirDorward]

My experience of sound when falling asleep is that the brain stops
extracting/decoding sounds out of the space you are in, so you can actually
perceive the room or space (reverb) with profound clarity.
When sleeping in a forest, you are blessed with the absolute lushest
reverbs!
(I'm not sure why reverb developers don't often attempt to simulate forest
reverb)
Also, I find in general that listening to music in this state is not
dissimilar to listening on psychedelics.
Colin

On Thu, Aug 18, 2022 at 10:28 AM cheater cheater via Synth-diy <
synth-diy at synth-diy.org> wrote:

> Ah, yes, auditory fatigue is a thing that I've experienced as well.
> You just need to listen to a saw oscillator for an extended period of
> time.
>
> The flashing thing - did you know that the visual cortex has a
> resonant frequency, and there are projects that trigger it to create
> hallucinations?
>
> I've just remembered another auditory phenomenon. Sometimes, rarely,
> but this has happened on a handful of occasions including recently,
> when I'm really tired, I'll be dozing off, and if I decide I don't
> want to fall asleep, sometimes I'll have a period of increasing
> weakness washing over me (normal when tired), but then I'll snap out
> of it. Sometimes this "snapping out of it" is accompanied with the
> sound of a spark going off. Like in a spark gap, like say a gas range
> starter. Really bizarre. It's like that gate effect I described
> previously has some sort of crazy transient overshoot when it's being
> opened again.
>
> On Thu, Aug 18, 2022 at 7:15 PM Barry Klein <barryklein at cox.net> wrote:
> >
> > I’ve noticed a couple things that may relate.
> > 1. Metal detecting with a PI detector that has a warbling tone, after
> several hours detecting, take off the headset and the ambient sounds are
> modulated by that same warble rate.
> > 2. Using a light and sound meditation unit, My brain/sight “circuits”
> would retain the flashing. Bizarre to think something in me is doing that.
> Why?  Probably does this somehow with the audio depending on what form it
> is. I had an alpha wave detector that would warble when alpha was present.
> But then I’d recognize this and break out of the alpha often.
> >
> > Barry
> >
> >
> > > On Aug 18, 2022, at 9:44 AM, cheater cheater via Synth-diy <
> synth-diy at synth-diy.org> wrote:
> > >
> > > Hi all,
> > > I'm sure many have noticed that your sound perception changes in the
> > > moment immediately before falling asleep. I was wondering if anyone
> > > would like to describe what effect they hear. Since we all know
> > > synthesizers, synth and audio engineering related terms are going to
> > > be very useful here.
> > >
> > > I suggest writing down whatever you can remember before reading the
> > > rest of the thread, so you don't get influenced. Then read the thread
> > > to see if anything seems familiar.
> > >
> > > If you make any observations in the future, come back to the thread
> > > and add to it.
> > >
> > > My description follows below.
> > >
> > > ------------------------------------------------------------------
> > >
> > > I've been dozing off just now with the AC on (wide band noise, biased
> > > towards LF). The sound suddenly changed to something like a very deep,
> > > quickly animated chorus effect applied to the sound. By quickly
> > > animated I mean it sounded like multiple parallel stages (3-5?) with
> > > separate LFOs where you could hear LFO peaks of the various LFOs maybe
> > > 5 times per second.
> > >
> > > Other times, in a room without wideband noise - eg watching a podcast
> > > on youtube - sound seems to cut off fairly cleanly with a short decay,
> > > like maybe 0.2-0.5s decay. If I'm coming out of it sound will show up
> > > again. If this keeps on cycling I can perceive those holes in sound.
> > > It sounds like the cleanest ducking gate, no click, no coloration.
> > >
> > > I remember back in high school I wasn't getting a lot of quality sleep
> > > so once or twice before falling asleep i'd hear auditory
> > > hallucinations. Usually what amounts to children's voices laughing or
> > > saying something I can make out but not understand. Not exactly
> > > related, but one time I was so tired at school that I dozed off
> > > between classes. A classmate tried waking me up and I started talking
> > > to him, still in a dazed state, but no real words came out, just
> > > gibberish. That's never happened before or since, and it was odd
> > > enough that I took note of it.
> > >
> > > Best regards
> > > _______________________________________________
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> >
>
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