Raspberry : power supply with LT3045 regulator (low noise)

[magicwolf]

Would be nice to compare RMAA of audio output with unmodified and modified supply.

Well, I'll take the measurements again, there was no difference last time, when I made similar measurements.

Most will absolutely believe you hear those differences. Most (here at least) will also understand that without controls people hear all kinds of things.

Since these differences relate to visualization, alas, I do not know what measurements should be taken to quantify them. J-test is possible, but I do not know how to do it ;((

 

[antcollinet]

Well, I'll take the measurements again, there was no difference last time, when I made similar measurements.

Since these differences relate to visualization, alas, I do not know what measurements should be taken to quantify them. J-test is possible, but I do not know how to do it ;((

I think @BDWoody was pointing out that without controls, the differences you hear between DAC's, most here will just assume they are not in the audio signal but a result of expectation bias (or similar). Since (unless one of the devices you are comparing is effectively broken) the measurements tell us any differences in the audio signal are - inaudible.

 

[BDWoody]

Since these differences relate to visualization, alas, I do not know what measurements should be taken to quantify them. J-test is possible, but I do not know how to do it ;((

Alas, you demand the impossible from me.

No, just a controlled listening test.

I do not like swapping from one source to another using small fragments, you can convince yourself of anything this way IME.

Controlled tests are definitely a pain to set up properly, but unfortunately our brains are too tricky to outsmart without isolating just the ears to be sure we are hearing what we think we are hearing.

People also sometimes abandon controlled testing when they try it, and it doesn't support their pre-drawn conclusions.

 

[magicwolf]

but a result of expectation bias (or similar)

My expectations were that one power supply unit would be enough. I really don't want to make two power supplies and it's strange to pick up voltage for them.

 

[magicwolf]

No, just a controlled listening test.

Really?! You're asking too much of me.

but unfortunately our brains are too tricky

When I read this, I think that it is necessary to treat life easier. I think don't have to be very cunning and mislead people. Otherwise, people will never listen to music, because they will think that their brain is too cunning, and everything they hear is wrong.

 

[magicwolf]

Would be nice to compare RMAA of audio output with unmodified and modified supply.

IMHO there are no differences

 

[antcollinet]

My expectations were that one power supply unit would be enough. I really don't want to make two power supplies and it's strange to pick up voltage for them.

That is not how expectation (and other) bias (es) works. Being a subconscious process, It has nothing to do with your conscious expectations.

 

[magicwolf]

That is not how expectation (and other) bias (es) works. Being a subconscious process, It has nothing to do with your conscious expectations.

Are you a professional psychologist? Why are you trying to explain to me I can't think straight?! It's disrespectful, I can't communicate with you, as your remarks are essentially offensive and not useful to me.

 

[popej]

IMHO there are no differences

Then I wouldn't look for audible differences.

 

[popej]

Are you a professional psychologist?

In audio business psychology is mandatory. We all learn it
Actually it is fun too, for example watch McGurk effect:

 

[Barrelhouse Solly]

IIRC, in his test of the Allo Boss2, Amir tried it with Allo's high end power supply and a generic one. The measurements were about the same.

 

[BDWoody]

Really?! You're asking too much of me.

Asking for anecdotal claims to be taken seriously is what gets to be too much.

When I read this, I think that it is necessary to treat life easier.

In terms of going through day to day life, I agree.

I think don't have to be very cunning and mislead people. Otherwise, people will never listen to music, because they will think that their brain is too cunning, and everything they hear is wrong.

I'm not sure exactly what that means, but understanding how easily we are fooled into hearing 'things' can make it a lot easier to just ignore all the silly claims, particularly when a little bit of understanding about how it all works can go a long way.

Are you a professional psychologist? Why are you trying to explain to me I can't think straight?! It's disrespectful, I can't communicate with you, as your remarks are essentially offensive and not useful to me.

No one is intending disrespect. Are you open at all to the idea that what is being said here might have some validity? This industry capitalizes on ignorance. We try to be a place where evidence is king, and unsupported unlikely claims like those repeated ad-nauseum throughout the hi-end propaganda machine can be addressed based on actual evidence.

I hope you do more reading before you continue dismissing people who are trying to help.

 

[antcollinet]

Are you a professional psychologist? Why are you trying to explain to me I can't think straight?! It's disrespectful, I can't communicate with you, as your remarks are essentially offensive and not useful to me.

Bad faith discussion - heading perilously close to the ignore list.

 

[fpitas]

Bad faith discussion - heading perilously close to the ignore list.

You have farrrr more patience than I would.

 

[LTig]

That is not how expectation (and other) bias (es) works. Being a subconscious process, It has nothing to do with your conscious expectations.

Are you a professional psychologist? Why are you trying to explain to me I can't think straight?! It's disrespectful, I can't communicate with you, as your remarks are essentially offensive and not useful to me.

He tells the truth, and before I read his posting I planned to post the same. Try to open up for things even (or especially) if they go against your current state of knowledge.