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

[Barry Klein]

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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