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TOPIC: Upgrade path for OpenDRC owners

Upgrade path for OpenDRC owners 5 years 6 months ago #14270

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@ mrichard,

A very good answer from "Master Doug" so we gave only a minor comment.. :-) Acourate doesn't work @ 96k so the answer is no, it wouldn't work to keep acourateDRC + upgraded DDRC. The DDRC upgrade mentioned in this thread is ONLY for people intending to use Dirac. AcourateDRC and Dirac being substantially different software obviously..

If you want to do a test @ 96khz (without AcourateDRC though), you could do a test with the miniSHARC plug-in as already suggested by Doug. But once again, a warning that this plug-in is NOT compatible with AcourateDRC (48k only).

Hoping this clarifies

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Upgrade path for OpenDRC owners 5 years 5 months ago #14597

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Dear Devteam, dear Doug, many many thanks for your reply.
During these days I tried the suggested plug in and first of all I did some considerations about.
Apparently, but only because I do not have a deep knowledge of the firmware on OpenDRC, acourate works al 48 khz using 6144 taps in a simmetric way.
So considering 48 khz and 12288 weights for the FIR elaboracion (or 6144 taps and 24 khz) the frequency resolution is 3.9 hz. Is it correct? (it seams so looking at the impulse response drawing of the the taps in the time domain and the related picture of the FIR filter in the plug-in in the frequency domain)
Now, Dirac kit works at 96 khz: how many are the taps (or the weights of the FIR elaboration)? Or in other words: which is the used resolution ?

My trials during last days were to have a interpolation curve of the original FIR pulse response (48khz) of Acourate then to sample this elaboration at 96 khz and obtain the right number of weights for the minisharc_96 plug in.
Unfortunately this plug in has been designed for a multichanne application and for a stereo purpose the number of allowed taps is very poor, only 2024 for each channel. The resolution is a disaster and the related correction is poor.
Many thanks in advance again
Ciao
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Upgrade path for OpenDRC owners 5 years 5 months ago #14607

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@ mrichards

Sorry but we're going to have to ask to move this thread to the miniSHARC section. This section of the forum is "ONLY" for the DDRC Dirac series so out of topic in what you're asking here (custom FIR). We'll move your topic there once done. Thanks for starting a new thread and for your understanding.

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Upgrade path for OpenDRC owners 5 years 5 months ago #14612

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Many thanks for your reply, Devteam.
But my question is about Dirac series, I have only done some considerations starting from miniSHARC. I'm not interested in a custom FIR. Anyway I'll open the tread in the right section.

Let me repeat the questions related at DDRC Dirac series.

Dirac kit works at 96 khz: how many are the taps (or the weights of the FIR elaboration) in the DDRC Dirac? Or in other words: which is the used resolution in the DDRC Dirac?

Many thanks in advance
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Upgrade path for OpenDRC owners 5 years 4 months ago #14624

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@ mrichard,
Ok, I see. I got confused as to the question you were asking which are related to a FIR configuration + acourate + FIR filter dev. We didn't see any link with Dirac Stereo configuration which is for room correction only and a ready made solution (i.e. doesn't requiring you to perform this level of investigation).

Dirac has a proprietary structure which we can't clarify publicly being under NDA. We can just say that the thinking of how large the FIR bank is just doesn't apply under DDRC series thanks to the innovative (and proprietary) structure of the Dirac algorithm. Sorry, that's about how much we can say. There is a very good paper on Dirac website (see DDRC page downloads at bottom). That's a good start.

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Upgrade path for OpenDRC owners 5 years 4 months ago #14630

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:)
Many thanks

Ciao
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