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Gieseler Audio

Raspberry Pi Klein combo interest

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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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Yes I agree the double process does not seem logical but it has the advantage of retaining DSD compatibility which a lot of people want. Using the Sparky/USB bridge the USB signal is reclocked & has very low noise so it should work really well with the huge amount of USB DAC’s that are out there.

I have tried Kali with good results but no DSD unfortunately.

 

 

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Thanks Gieseler, Im a bit of a 44.1/16 guy so DSD wasnt part of my thoughts :/

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There are reports from the Roon and Computeraudiophile forum that the Allo USBridge is on par with the Sonore microRendu even when the mR has a better PS.

It is the best to power the Sparky and USBridge separately.

The Gieseler PSs are certainly very good, for lovers of SMPS Allo will launch in two months a 5V Super SMPS, named Nirvana.

 

Matt

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The feedback on the USBridge is excellent.

I have just ordered one with  DietPi as OS.

Now I have this radical idea about a bigger case for the Gross DAC & installing the USBridge inside. 

Then I could add two more low noise PSU’s - one for the Sparky & one for the USBridge board.

Anyway one thing at a time so as soon as the USBridge arrives I will give it a thorough workout with the Gross DAC & post the results.

Thanks Matt for alerting me about this. 

:popcorn:

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34 minutes ago, Gieseler Audio said:

Now I have this radical idea about a bigger case for the Gross DAC & installing the USBridge inside. 

Clay,

sorry, but I see no gain to put the USBridge inside.

You would have USB out/in inside the case, it does not make sense.

And you would need something like an OEM contract with Allo to do this.

Anyway, I like to get your feedback about the USBridge.

Thanks

 

Matt

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17 minutes ago, matth said:

And you would need something like an OEM contract with Allo to do this

I cant imagine Allo have much say in what anyone does to the device after it has been sold

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1 hour ago, Gieseler Audio said:

The feedback on the USBridge is excellent.

I have just ordered one with  DietPi as OS.

Now I have this radical idea about a bigger case for the Gross DAC & installing the USBridge inside. 

Then I could add two more low noise PSU’s - one for the Sparky & one for the USBridge board.

Anyway one thing at a time so as soon as the USBridge arrives I will give it a thorough workout with the Gross DAC & post the results.

Thanks Matt for alerting me about this. 

:popcorn:

 

On 04/03/2018 at 9:26 AM, scumbag said:

Allo usb bridge might be a good candidate? https://www.allo.com/sparky-eu/usbridge.html

No problem ;)

 

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On 09/04/2018 at 8:30 AM, scumbag said:

 

No problem ;)

 

So what's the dirty on the USBridge?  Lookig at it as a (relatively low cost) option over sms-200 for Roon (streaming Tidal) endpoint.....

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I've been sitting with my cursor hovering over the buy button on an allo pi based streamer for quite a few months.  I'm not in a position to give any sort of ranking unfortunately . What I can do is join the dots between the different reviews. John darko very handily has a section on streaming devices in his dac rankings. According to that, the allo devices seem to sit in sound quality around the microrendu. He has never reviewed the sotm200 so there is no way to get a feel for where he thinks the usb bridge or the DIGIone sit with regards to it. Hans beekhuyzeen has reviewed the mr, the sotm200, the allo usbridge and the DIGIone. His videos are quite long and exhaustive but the feeling I get is that the allo solutions are going toe to toe with the sotm200. 

Anyway, what is now grabbing my attention and is more relevant to clay's interests is the Kali reclocker. I've been itching to grab one of these to listen to as it has i2s output so no conversion to usb or spdif and 

possibly less interaction with cables as i2s. I'd like to hear this feeding my directstream junior! https://www.audiophonics.fr/en/raspdac/raspdigi-lte-lvds-reclocker-kali-streamer-i2s-lvds-hdmi-audio-gd-compatible-p-12031.html

Not cheap but very interesting. 

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Hi Mark,

the Allo Kali sounds very good. Works well with picore player too.

You just need a DAC with I2S in.

I have not done a comparison to the USBridge yet.

I ordered it (USBridge)with the Allo dietPi OS - unfortunately it is a very basic gui with not a lot of options. I'm wanting to use it as a standalone unit so you need to go in via ssh & install LMS, mount drives ect. I will let you know how it sounds when I get it up & running. Allo support is good which is a big help.

 

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