[pjanecke]

Hi, I currently use HQPlayer for my DSP and 4way xovers.
Can the DSPNexus USB input receive all 8 channels so that I could start out using just the DAC portion and continue doing the DSP in HQPlayer which I’ve been very happy and successful with.
What attracts me most to the DSPNexus is the upgradable DACs - there just aren’t many choices out there for multichannel DACs.

[HAL]

Hi, I currently use HQPlayer for my DSP and 4way xovers.
Can the DSPNexus USB input receive all 8 channels so that I could start out using just the DAC portion and con tune doing the DSP in HQPlayer which I’ve been very happy and successful with.
What attracts me most to the DSPNexus is the upgradable DACs - there just aren’t many choices out there for multichannel DACs.

The dspNexus 2/8 is two channel input.  It will not work with multichannel USB audio inputs.  It is designed as a stereo input digital crossover control center. 

Audio Weaver software on the PC is a very capable DSP crossover processing development system that creates the DSP program that runs the dspNexus 2/8.  I have ported users previous DSP crossover designs with Audio Weaver to run on the dspNexus 2/8.

HQ Player could be the two channel source for the system for DSP processing for the 8 channel output.

[pjanecke]

Thanks HAL,
My speakers are open baffle and I’ve been using REW measurements and Eclipse FIR designer to create FIR filters for each of the 8 channels.  The FIR filters contain mostly IIR filters and I limit the use of linear phase filters to minimize the risk of pre-ringing.   I tweak the design as my drivers and baffles have evolved.  The 8 filters do require an Intel I9 14700 Linux PC to run with HQPlayer.   I also upsample in HQplayer to 8 channels of DSD256.   
How feasible is this with the new Sharc processor in the DSPNexus?   I don’t have a feel for how its processing capability maps to the Intel.
Is there a version of Audioweaver that I could buy to get the hang of it?   I enjoy learning new stuff (retired IT) - for me it’s part of the fun.

[HAL]

Thanks HAL,
My speakers are open baffle and I’ve been using REW measurements and Eclipse FIR designer to create FIR filters for each of the 8 channels.  The FIR filters contain mostly IIR filters and I limit the use of linear phase filters to minimize the risk of pre-ringing.   I tweak the design as my drivers and baffles have evolved.  The 8 filters do require an Intel I9 14700 Linux PC to run with HQPlayer.   I also upsample in HQplayer to 8 channels of DSD256.   
How feasible is this with the new Sharc processor in the DSPNexus?   I don’t have a feel for how its processing capability maps to the Intel.
Is there a version of Audioweaver that I could buy to get the hang of it?   I enjoy learning new stuff (retired IT) - for me it’s part of the fun.

The ADSP21569 SHARC processor is running at 1GHz.  The CPU architecture is very different from Intel for math processing, so hard to directly equate.

If you are doing long FIR filters, the present software gives about 6000 taps across all channels.  There is a FIR coprocessor as well that can be used in parallel.  Both are limited by the memory available.   

If the HQ Player needs an Intel i9 processor for a very large number of FIR filter taps per channel, then the SHARC would not be a good fit.   It does not process DSD data as everything internally is processed at 32bit float/192KHz PCM and no DSD output to the internal DAC's.

You can go to the DSP Concepts website and with a corporate email account get a version of Audio Weaver for trials.  This is the two channel processing version.  Other than that process a single product license is $60K.  The dspNexus 2/8 comes with the Audio Weaver license and specific version for the hardware needed. 

Best I can say with the information.