More Pi / Computer Based Audio Questions

[Weeman1973]

So I think I now have the Pi up and running as it should on Roon (see my other thread...) and really starting to enjoy what Roon can do.

As I have a Tidal HiFi subscription, I'm keen to trial the MQA facility and have gotten my hands on a Pro-Ject S2 Digital Pre-Amp DAC which unfolds Masters quality files.

The bad news is that I've learnt this facility is only available via the USB inout of the DAC and not Coax / SPDIF or Optical.

Question is how do I get audio output via USB on my Pi (Hifiberry Digi +) as I can only see SPDIF / Optical outputs on this or can't I?

If not, are there Pi sound cards with USB audio out that I can sue or do I need to use a PC / Mac?

Thanks.

[Shovel_Knight]

You have to connect the Pro-Ject to one of the USB ports on the Pi.

[Alp]

You need to take the USB directly from the RPI. The Digi+ only provides a coax interface for the RPI. It's worth spending a bit on a decent USB cable because, as I discovered, they do make a difference, and eventually a reclocker if your budget will stretch that far. There are several threads on TAS on USB cables and reclockers.

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[Weeman1973]

Thanks, that's what I thought but I can't get any audio signal out of my Pi's 4 USB sockets at all, hence the question?

I don't have the Pro-Ject DAC yet but it won't work with my Chord Mojo anyway.

Do I need to adjust any settings in my Pi?

[Weeman1973]

This is a screenshot of the signal path on Roon.

It’s showing as still going through the HiFiBerry Digi + even though no cables are coming from the Digi + to any DAC

https://uploads.tapatalk-cdn.com/20200311/c621b40fa4e32c70dc0bf1fa0ac94617.jpg


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[Alp]

You will only get sound out of it if it is connected to a USB capable DAC. I don't know Roon, but you might have to change settings to do so.

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[struth]

did you tell the pi os that you no longer use the digi board and switch off the is2 switch

[Weeman1973]

A reboot of Volumio on the Pi seems to have worked. Roon is now finding my Mojo through USB - hope it does the same when the Pro_ject arrives....

No doubt will have more questions about how to get the Pro-Ject working with MQA material - watch this space....

[Weeman1973]

So the Pro-Ject DAC arrived and I installed it into the system.

Initial findings are positive with the added benefit of playing MQA files to boot.

Looking forward to playing more at the weekend.....

https://uploads.tapatalk-cdn.com/20200311/2fffb0a6a531b0b6076165765209f31c.jpg
https://uploads.tapatalk-cdn.com/20200311/3511afbf7065e00e569c2f8b55feee74.jpg

[struth]

good stuff

[Alp]

Looks very neat.

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[Made in 1968]

I refuse to entertain a format that cannot be generally used with anything other than a dedicated processor..