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Gieseler Audio

Raspberry Pi Klein combo interest

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Hi Guys,

thanks for the input & yes Snoopy you are spot on - my expertise’s are hardware with some basic firmware control.

I’m certainly in no position to do the required software development needed for those other features. 

In light of that I think it is best to purchase separately the front end streaming device that ticks all your boxes & connect it to a good DAC - like my Gross haha

 

Matt - yes a second hand Aries is a great idea. The Lightning DS app now has a Spotify option as well which is a big bonus.

A recent Gross DAC buyer just went through all this & ended up with a s/h full Aries & is absolutely delighted with the resulting combination. He is a SNA member so maybe he may comment. 

Edited by Gieseler Audio

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So I've just setup two Audiophonics RaspTouch I-Sabre ES9028Q2M network and DAC drives with volume / source controllers and touch displays. See https://www.audiophonics.fr/en/rasptouch/rasptouch-i-sabre-es9028-streamer-touch-with-volume-control-p-12181.html

 

They use a Raspberry Pi 3B with Audiophonics I-Sabre ES9028Q2M DAC, 7" OLED Touch Screen, Volume control, Steel case, and 8 GB memory card running RoPieee OS to create a RoonBridge.

 

If Clay ever produces an audiophile quality unit with this sort of functionality, I'd love one for my main listening system. The extra functionality and guest friendliness of the touch screen and display is awesome.

 

In the meantime, I'll wait and see what Clay has in the works for his next product before deciding what to put on my main listening system.

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Hi Loyd,

hey the Audiophonics RaspTouch unit looks very nice - how do they sound?

It looks like an excellent concept that they have put together too. 

I particually like the way they extended the Pi’s micro SD port to a external rear socket.

Now I wonder where I can find one of those leads?

Hopefully in the not too distant future I can incorporate a Pi style renderer into my Gross DAC.

 

Edited by Gieseler Audio

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59 minutes ago, Gieseler Audio said:

hey the Audiophonics RaspTouch unit looks very nice - how do they sound?

 

I haven't had a chance to do any critical listening yet. Hopefully that will happen tonight.

 

Plus, right now to get it working with RoPieee, I have to use the Raspberry Pi DAC drivers, not the Audiophonics ES9028Q2M ones.

 

And of course, if I wanted the best sound the unit could make, I'd be needing one of your linear low noise DC power supplies. Even better a solution where your power supply could feed the RPi and the DAC separately, rather than just via the RPi.

 

Clay, make that a Pi style renderer with touch screen in a Gross DAC, and you'll have another customer. :-)

And no doubt your unit would power the RPi and Gross DAC in a more appropriate way.

Edited by lloyd_borrett

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Hi Matt,

I checked that out & it looks really good so I might give one a whirl.

Extreamly low noise levels which is great.

For OS they are suggesting Volumio & DietPi.

I’ve tried Volumino - very basic app control say compared to iPeng so I’d give that a miss.

Have not tried DietPi - have you?

I love the iPeng app for control so I think I will go with Picoreplayer.

I think it has good DSD compatibility  & a Tidal plug-in as well.

At the end of the day as a source it will probably sound similar to a microRendu or SMS-200 at about one third the price!

Edited by Gieseler Audio

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G'day Clay,

 

I'm using Ropieee for the software on my RPi based DAC solutions as I'm only using Roon. I have no idea as to what the differences between the other software setups you mention would be.

 

I'd been considering the use of an Allo USBridge instead of an ultraRendu for use with one of your Giesler DACs.

 

The only concern I have is the quality of the power supply. Most of these RaspberryPi based solutions just come with a standard wall wart. Some people use a linear power supply instead, which is supposed to make a difference. But as the power is going via the RPi to the add-on board, it tends to get noisy again. So some of the add-on boards can take power direct and then supply the RPi. Some even make it possible for the RPi and the add-on board to be powered separately by suitable linear power supplies. But I've not seen any off-the-shelf power supply solutions doing this for the likes of myself. These optimal power supply solutions tend to be done by those prepared to make mods to cases and boards.

 

Thus if an Allo USBridge based solution were to be used with say a Giesler Groß DAC, you may want to consider providing an option for an optimal power supply solution able to be implemented by those of us who don't want to start making mods to cases and firing up a soldering iron.

 

My reading of what you've been trying with your own RPi combined with Giesler DAC solution suggests you fully understand the importance of achieving the right power supply solution. Which is why someone like me, looking for an off the shelf solution, would be interested in a unit along the lines of the direction you were heading. I suspect using a wall wart powered Allo USBridge with a Giesler DAC would be a SQ compromise.

 

(I hope some of the above makes sense.)

 

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Hi Loyd,

 

absolutely spot on!

I agree the best way to do it would be to provide the Sparky & the USB bridge both with independent ultra low noise power supplies. Rather than try & build it all into the Gross chassis I think it would be better if I came up with a dual output (5v + 5v)

external low noise PSU. That way anyone could use the Sparky/USB bridge combo with their own USB DAC. I think the Sparky & USB bridge can be powered seperately if you leave a jumper open on the USB bridge.

 

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I'm confused by why you would convert from to I2S to USB only to go back to I2S i to the DAC chip ?

I thought the strength of the rPi is the short circuit length that isnt molestered on its trip to the dac.

Wouldn't the better solution be to engineer a solution somewhat like the kali reclocker feeding your best dac implementation ?

 

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