HAPI in Standalone D/A operation

[DJS]

I want to try to run 4 AES pairs into HAPI and get the analog outputs from the D/A card, all in standalone mode. This is to power my active speakers from a digital only miniDSP Xover. Is this possible? I have set HAPi up and in the routing menu chosen the source of the D/A card as AES. But I can't get any audio routing through, it remains silent.

[Julian Gough]

This is possible, but I've only ever done routing via the advanced browser accessed via MT Discovery and it's not a very user friendly area. I have Horus only so don't know what the Hapi routing menu consists of, but since it doesn't appear to work for you, you might like to try this way.

Even though the audio is not leaving the box, this methods effectively places the AES sources onto the Ravenna network, then lift those sources off the network and send them to the analogue O/Ps. The process was described in this topic

viewtopic.php?f=4&t=11134

Like in the previous topic above, I'm not in front of a working system but before Christmas, using this method I managed to route 32 mic inputs on one Horus to a MADI O/P on another Horus. As long as you shutdown properly, the boxes remember the routes, everything remains the same when you switch on next time.

Let me know if you have a problem getting this to work, in which case I will try and describe the process in more detail.

Cheers,

Julian

[mpdonahue]

I want to try to run 4 AES pairs into HAPI and get the analog outputs from the D/A card, all in standalone mode. This is to power my active speakers from a digital only miniDSP Xover. Is this possible? I have set HAPi up and in the routing menu chosen the source of the D/A card as AES. But I can't get any audio routing through, it remains silent.

I can verify that this function works fine. I would check your clocking to make sure the Hapi is locked to the AES input and not Internal/Ravenna/PTP.
All the best,
-mark

[Julian Gough]

I can verify that this function works fine. I would check your clocking to make sure the Hapi is locked to the AES input and not Internal/Ravenna/PTP.

Interesting, but would it be mute if the problem is un locked audio?

If you've made this work Mark, I would suggest my method of routing via Ravenna is a workaround, not a solution.

I know I'm stating the bleeding obvious here, are you absolutely sure the audio is getting to the Hapi on the AES inputs?

Julian

[DJS]

Many thanks Julian and Mark. Good to know it is possible, I certainly was confident it was. Now you mention it Julian, I am not absolutely sure the audio is coming out of the nanoDigi, it certainly was for the miniDSP_4x10 DAC I had in there before and I loaded the same config into the nanoDigi. But this is likely to be where the problem is.

[DJS]

Wow!!! I managed to get it all working and it is the most stunning sound I have ever heard from a set of loudspeakers (LX521 dipoles). The problem was the nanoDigi needs a different plugin to the miniDSP4x10. Once I downloaded that and loaded the xover curves and hooked it up, clocked from the AES pairs, it all works perfectly. Absolutely amazing.

Note that the multichannel NADAC does not have multichannel digital inputs, so it seems that it cannot be used for active speakers and DSP xovers whereas HAPI with a premium D/A card with its AES inputs can, due to that direct routing from AES to D/A and the stand alone operation.

A stunning solution for LX521 speakers with nanoDigi for the xover.

[odis84]

Can you please clarify your connections and confirm what I'm reading as correct?
You have successfully used the SPDIF output from the MiniDSP nanodigi into the AES input on the HAPI? Without any other intermediate converters?

My understanding was that spdif and aes are of different impedance and voltage and were not directly compatible.

I am currently using a 4x10 unit for my active setup and have been looking for an upgrade path. My curves require biquads and I have yet to find an Apple compatible program to generate my crossover filters. Pure music is used for playback but it's crossover functions are lacking.

The solution you have would be great if I can migrate my config files from one Minidsp plugin to another.

[DJS]

Correct. I have SPDIF out of PC into nanoDigi, then the four SPDIF outputs are converted to AES using some canare inline transformers, then into HAPI AES input. In HAPI setup, I have the AES inputs routed directly to the D/A and it operates beautifully in stand alone mode, no ethernet connection is required. I just turn it on each time and it works flawlessly. The D/A in Hapi is a significant step up from miniDSP 4x10 DAC.

[odis84]

That's good news to hear you implement a passive solution.
Could you please tell me the specific part number of the Canare adapter? I found a 110-75 xlr to bnc but they make reference to aes to spdif and not the reverse. Is it as simple as just using them in the opposite direction?

[DJS]

That's good news to hear you implement a passive solution.
Could you please tell me the specific part number of the Canare adapter? I found a 110-75 xlr to bnc but they make reference to aes to spdif and not the reverse. Is it as simple as just using them in the opposite direction?

http://www.bhphotovideo.com/c/product/3 ... hm_to.html