John Curl's Blowtorch preamplifier part III

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Roon has a streaming source service ?

Yes, they stream.

Downloads for various OS can be found at: Roon Labs: Download

As you can see Windows is not a requirement.

IIUC, The 'Server' part does the heavy computing and builds a library of your own music files on it.
'Control' is the user interface to run it (works nicely on iPad, it is said).
'Bridge' is the (optional ?) part that gets files from the Server and sends them to the DAC.
Again IIUC, you can have one central server and then a Bridge in each zone of your house where you want to run a separate DAC. A common Bridge device is Raspberry Pi, for example.
Its also possible to run everything on one computer, just depends on what one wants to do.
 
Yes, Bill that’s what I thought.

I already have tidal integrated with Roon ‘essentials’ which is basically the same format as full Roon (minus most of the dsp) but run entirely from an app.

Mark, I may get into the full Roon thing sooner or later, I think they now integrate Qobuz also so it would be a good way to do a direct comparison with tidal/Qobuz.......maybe keep them both.
I have looked at the little green computer stuff as a server which (like you say) I believe eliminates the need for pc interaction. But......that’s all a big step $$.
 
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I could understand using the straight dsd format (as in sacd or dsd files)

But converting a supposedly lower quality format (flac/pcm) to dsd and expecting it to be better is kindly confusing?

Sounds just like MQA but different.

Actually, when I have tried it straight DSD (DSD64) doesn't sound that good on the multibit SD dacs available. Doesn't start to sound really good up until about DSD256.

In the case of newly made hi res masters, if they were digitized to DXD then don't know if that is such a good thing. Things may have changed, but at one point there was only one manufacturer of DXD ADCs. Didn't much like the sound of it myself, too bright, not that musical.

On the other hand, a good CD upsampled to DSD256 or DSD512 using very best HQ Player quality sounds close to really good vinyl (played on AK4499 properly powered), IMHO.
 
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Huh.....something else to try I suppose.

Have you ever really listened to anything MQA on a good system? I never have so its hard to dismiss without trying it.

Especially knowing tidal intimately on the hifi level.

Edit.....well when you put your new dac into production make sure it upsamples to dsd512.....standalone, none of the pc stuff! :p
 
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Well mark, looks like I can kill two birds with one stone!
There’s a thread on another forum I was just reading that says, hq player upsampling to 512 into the project Pre box s2 works great. (Also ifi black)
So ability to test MQA, and try upsampling, with a preamp to try bypassing the pre on my Hint to see if that’s one of its issues.......All for under $400.
Tests come back decent on the project prebox and there’s even some pretty easy mods for it out there.

Anybody have any listening experience with a project prebox s2?
 
Joe

Have you heard about Peter Walkers equation?
An online description can be found in https://home.kpn.nl/verwa255/esl/ESL_English_2011.pdf on page 26.

/örjan

"The cone moves because it is driven by the equivalent of an electric motor, consisting of a coil (the speech coil or voice coil), which is suspended in the magnetic field of a strong magnet. The force that such a coil feels when we send a current through it is known as the Lorentz force [electromagnetic force]."

[] Added.

It then makes certain assumptions about mass and thus the dynamic driver being inferior to electrostatic drive. Since it promotes the latter, then some of the conclusions re the weaknesses of dynamic coil drive are not entirely accurate. But that is forgivable.

"The driving force in an ESL is not the Lorentz force but the attractive or repulsive force between electric charges, known as the Coulomb force [electrostatic force]."

[] Added.

There it is.

PS: Over the years I have had a number of friends who have designed and built electrostatic speakers. In Auckland Brian Gurr who rebuilds with membranes that are 30% thickness compared to commercial (more robust) models. But he also has a pair of my Elsinore speakers and they do in fact compete because they suppress the "back-EMF impedance" of the drivers and hence start to now compete, something that will surprise... I have no real commercial interest in DIY Elsinore Project speakers (just massive out-of-pocket expenses).

PPS: It was one of your countrymen from Goteborg (Gothenburg to others) that confirmed that notion of Danish humour. So there you are.
 
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