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I think electrical engineers having done some RF designs generally regard audiophiles as flat-earthers explaining what is wrong with a flat map; they might get

by acje 4y ago

I think electrical engineers having done some RF designs generally regard audiophiles as flat-earthers explaining what is wrong with a flat map; they might get it right now and then, but always for the wrong reasons. Remember how in the 90ties you could hear an SMS coming to a phone near an audio device? Right! No physical connection and sure you can’t hear the 900mhz ish gsm signal, but the rectified and smoothed signal had an audible time division multiplexing (envelope). And the carrier wave often resonated with paths in the signaling path of the audio device.

eru 4y ago
The common term is 'GSM buzz', you'll find a lot about it online. I've also heard it in the 2000s.
- ed_elliott_asc 4y ago
  On a Sunday morning I used to lie in with the radio on, sleeping on and off. There was one song around 1999 that included the sound and also had my ring tone. It was a very confusing time. Found it: https://youtu.be/y8ClVMzt9Dw https://youtu.be/y8ClVMzt9Dw [edit: added link]
- yakubin 4y ago
  I heard it just a couple years ago, when I used a 2G phone. 3G and 4G don’t have that fault.
  - ed_elliott_asc 4y ago
    Fault or feature? Was nice to get some warning your phone was about to ring
pbazarnik 4y ago
The keywords are: EMI (electromagnetic interference), signal integrity, power integrity. Memcpy can have second order effects due to EMI radiated by CPU, motherboard or coupled via power fluctuations. There are audible and measurable effects of audio system clock jitter which in turn depends on oscillator power quality. Someone mentioned that ethernet has isolation transformers. But isolation transformers have parasitic common mode coupling which can inject the noise to ground plane if interference is strong and device is susceptible enough Watch the EEVBLOG on company which designed scope capable of measuring 1kV common mode signals. (present in EV electronics) https://youtu.be/I7ppDNLlEL4 https://youtu.be/I7ppDNLlEL4 Audiophile stuff is a weird mix of real effects and snake oil.
- eurasiantiger 4y ago
  This, so much this. Many people ignore most of the things affecting sound quality in their setup. Audiophiles don’t, and they often go the extra mile to satisfy their compulsion for better sound—up to and including psychoacoustics. If a $10,000 power cable makes your amp sound better to you, who’s to say it doesn’t?
  - stefs 4y ago
    the aunt of a friend promised sick people to talk to angels about their issues for only a modest sum. i'm sure those people felt at least a bit better afterwards, because they were of options otherwise. on the other hand, they spent hundreds of dollars for nothing and if they eventually recovered they'd tell other sufferers about it, dragging them down too. does the victims glimmer of hope justify her scam? background: she herself suffered from an "incurable" illness for months, where she paid other angel conjurers (that's where she got the idea from). turns out it was just iron deficiency and easily cured with iron supplements. at that point she'd already paid several hundred dollars to those charlatans.
    - eurasiantiger 4y ago
      That is called ”caveat emptor” and it is the founding principle of America.
  - dtech 4y ago
    Just because the placebo effect is real, it's bad to advocate people spending $10k on a placebo.
    - eurasiantiger 4y ago
      Hey, some people buy ads on social media.
- scoutt 4y ago
  Yeah.... but somehow changing the memcpy method improved the audio also of the commenters. Unless the commenters have all the same PC, it all smell like "bias".
dusted 4y ago
What do you mean the 90s? I can still hear my phone pining the tower when it's too close to my speakers ? (Eris E5 on balanced XLR into a Scarlett 2i4)
jcelerier 4y ago
... in the 90s? It still happens today with my phone
IYasha 4y ago
No, we don't. And with having enough budget and skills we try our best to shield stuff we make. As for radio noises: just remember that every freakin physical body is an antenna. Not just wires. All we can do generally is tune things in such ways that they resonte in a range we need and be as silent as possible in all other frequencies.

by acje 4y ago

eru 4y ago

The common term is 'GSM buzz', you'll find a lot about it online. I've also heard it in the 2000s.

ed_elliott_asc 4y ago
On a Sunday morning I used to lie in with the radio on, sleeping on and off. There was one song around 1999 that included the sound and also had my ring tone. It was a very confusing time. Found it: https://youtu.be/y8ClVMzt9Dw https://youtu.be/y8ClVMzt9Dw [edit: added link]
yakubin 4y ago
I heard it just a couple years ago, when I used a 2G phone. 3G and 4G don’t have that fault.
- ed_elliott_asc 4y ago
  Fault or feature? Was nice to get some warning your phone was about to ring

pbazarnik 4y ago

The keywords are: EMI (electromagnetic interference), signal integrity, power integrity. Memcpy can have second order effects due to EMI radiated by CPU, motherboard or coupled via power fluctuations. There are audible and measurable effects of audio system clock jitter which in turn depends on oscillator power quality. Someone mentioned that ethernet has isolation transformers. But isolation transformers have parasitic common mode coupling which can inject the noise to ground plane if interference is strong and device is susceptible enough Watch the EEVBLOG on company which designed scope capable of measuring 1kV common mode signals. (present in EV electronics) https://youtu.be/I7ppDNLlEL4 https://youtu.be/I7ppDNLlEL4 Audiophile stuff is a weird mix of real effects and snake oil.

eurasiantiger 4y ago
This, so much this. Many people ignore most of the things affecting sound quality in their setup. Audiophiles don’t, and they often go the extra mile to satisfy their compulsion for better sound—up to and including psychoacoustics. If a $10,000 power cable makes your amp sound better to you, who’s to say it doesn’t?
- stefs 4y ago
  the aunt of a friend promised sick people to talk to angels about their issues for only a modest sum. i'm sure those people felt at least a bit better afterwards, because they were of options otherwise. on the other hand, they spent hundreds of dollars for nothing and if they eventually recovered they'd tell other sufferers about it, dragging them down too. does the victims glimmer of hope justify her scam? background: she herself suffered from an "incurable" illness for months, where she paid other angel conjurers (that's where she got the idea from). turns out it was just iron deficiency and easily cured with iron supplements. at that point she'd already paid several hundred dollars to those charlatans.
  - eurasiantiger 4y ago
    That is called ”caveat emptor” and it is the founding principle of America.
- dtech 4y ago
  Just because the placebo effect is real, it's bad to advocate people spending $10k on a placebo.
  - eurasiantiger 4y ago
    Hey, some people buy ads on social media.
scoutt 4y ago
Yeah.... but somehow changing the memcpy method improved the audio also of the commenters. Unless the commenters have all the same PC, it all smell like "bias".

dusted 4y ago

What do you mean the 90s? I can still hear my phone pining the tower when it's too close to my speakers ? (Eris E5 on balanced XLR into a Scarlett 2i4)

jcelerier 4y ago

... in the 90s? It still happens today with my phone

IYasha 4y ago

No, we don't. And with having enough budget and skills we try our best to shield stuff we make. As for radio noises: just remember that every freakin physical body is an antenna. Not just wires. All we can do generally is tune things in such ways that they resonte in a range we need and be as silent as possible in all other frequencies.