gibbo9000 Posted December 2, 2021 Author Share Posted December 2, 2021 And more than a year after Roon's clamp down on uncertified devices, including the miniDSP SHD, minDSP have just advised they have at last been granted Roon Ready status. Woo Hoo!! Came in an email and will soon be in their Newsletter. Looks like just an upgrade to latest Volumio version, and Roon needing to formally flick a switch somewhere. Great outcome, long overdue. Gibbo 2 Link to comment Share on other sites More sharing options...
Grizaudio Posted December 2, 2021 Share Posted December 2, 2021 7 minutes ago, gibbo9000 said: And more than a year after Roon's clamp down on uncertified devices, including the miniDSP SHD, minDSP have just advised they have at last been granted Roon Ready status. Woo Hoo!! Came in an email and will soon be in their Newsletter. Looks like just an upgrade to latest Volumio version, and Roon needing to formally flick a switch somewhere. Great outcome, long overdue. Gibbo That's good news. The new Flex units look interesting. I need to review the max Tap's supported. https://www.minidsp.com/products/minidsp-in-a-box/flex 1 Link to comment Share on other sites More sharing options...
RoHo Posted December 3, 2021 Share Posted December 3, 2021 12 hours ago, Grizaudio said: That's good news. The new Flex units look interesting. I need to review the max Tap's supported. https://www.minidsp.com/products/minidsp-in-a-box/flex This is very interesting for me as it addresses two of the big limitations of the 2x4HD that I use: no visual display and no co-ax input. Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted December 3, 2021 Volunteer Share Posted December 3, 2021 7 minutes ago, RoHo said: This is very interesting for me as it addresses two of the big limitations of the 2x4HD that I use: no visual display and no co-ax input. It possibly makes the SHD redundant for some use-cases I think? 1 Link to comment Share on other sites More sharing options...
RoHo Posted December 3, 2021 Share Posted December 3, 2021 5 minutes ago, sir sanders zingmore said: It possibly makes the SHD redundant for some use-cases I think? Yes. The SHD bundles full-strength streaming and subwoofer integration together but a large number don't really want both of these features I would think. Or are not prepared to pay for them. Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted December 3, 2021 Volunteer Share Posted December 3, 2021 40 minutes ago, RoHo said: Yes. The SHD bundles full-strength streaming and subwoofer integration together but a large number don't really want both of these features I would think. Or are not prepared to pay for them. The “flex” can do subwoofer integration I believe Link to comment Share on other sites More sharing options...
RoHo Posted December 3, 2021 Share Posted December 3, 2021 21 minutes ago, sir sanders zingmore said: The “flex” can do subwoofer integration I believe Yes, I would consider that, with room correction, as it's primary use. A quick scan of the specs reveals it has "Bluetooth streaming" capabilities (means nothing to me!) but no other network connectivity. That's how I read it anyway. Is this sort of streaming popular? Link to comment Share on other sites More sharing options...
Lil Caesar Posted December 3, 2021 Share Posted December 3, 2021 Bluetooth streaming ? Oh it would only be the way 90% of the population consume audio these days Link to comment Share on other sites More sharing options...
RoHo Posted December 3, 2021 Share Posted December 3, 2021 16 minutes ago, Lil Caesar said: Bluetooth streaming ? Oh it would only be the way 90% of the population consume audio these days Duh! I was thinking of the hifi market. Do MiniDSP think they can grab some of that 90% with this type of product? Will JB Hifi be stocking them next to the glowing egg Bluetooth speakers? Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 3, 2021 Share Posted December 3, 2021 14 hours ago, Grizaudio said: I need to review the max Tap's supported. 4096. 2048 per channel. 1 Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 3, 2021 Share Posted December 3, 2021 6 minutes ago, RoHo said: Do MiniDSP think they can grab some of that 90% with this type of product? Will JB Hifi be stocking them next to the glowing egg Bluetooth speakers? No, audiophiles too. Better BT codecs can use the full BT bandwidth, which enough for 24bit / 96khz. 2 Link to comment Share on other sites More sharing options...
Steffen Posted December 3, 2021 Share Posted December 3, 2021 18 minutes ago, davewantsmoore said: 4096. 2048 per channel. Is that 2048 taps or 2048k taps? Link to comment Share on other sites More sharing options...
Steffen Posted December 3, 2021 Share Posted December 3, 2021 11 minutes ago, davewantsmoore said: No, audiophiles too. But they don’t admit to it At HiFi gatherings they take the Bluetooth antennas off their streamers or DACs Link to comment Share on other sites More sharing options...
Grizaudio Posted December 3, 2021 Share Posted December 3, 2021 (edited) 6 hours ago, davewantsmoore said: 4096. 2048 per channel. That's a little disappointing Most 'power' users would be better correcting using convolution in Roon. Edited December 3, 2021 by Grizaudio 1 Link to comment Share on other sites More sharing options...
Steffen Posted December 3, 2021 Share Posted December 3, 2021 47 minutes ago, Grizaudio said: That's a little disappointing Most 'power' users would be better correcting using convolution in Roon. That’s what I thought, hence my question. Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 6, 2021 Share Posted December 6, 2021 On 03/12/2021 at 2:25 PM, Steffen said: Is that 2048 taps or 2048k taps? 2048. It's not enough for low frequency phase linearisation ... but plenty for everything else. Link to comment Share on other sites More sharing options...
Volunteer sir sanders zingmore Posted December 6, 2021 Volunteer Share Posted December 6, 2021 1 hour ago, davewantsmoore said: 2048. It's not enough for low frequency phase linearisation ... but plenty for everything else. How does that compare to the SHD? Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 6, 2021 Share Posted December 6, 2021 (edited) 55 minutes ago, sir sanders zingmore said: How does that compare to the SHD? SHD does not allow user defined FIR filters. Just reading a bit more (and reading between the lines), I suspect that if/when you enable Dirac Live on the Flex, that DL will replace the option to run user defined FIRs (like it does on the 2x4HD). Edited December 6, 2021 by davewantsmoore Link to comment Share on other sites More sharing options...
RoHo Posted December 6, 2021 Share Posted December 6, 2021 3 hours ago, davewantsmoore said: 2048. It's not enough for low frequency phase linearisation ... but plenty for everything else. So for what in particular would it be worth doing with DIY FIRs with this device? Are there great gains to be had over what you can do with IIRs with this limited number of taps? Link to comment Share on other sites More sharing options...
andyr Posted December 6, 2021 Share Posted December 6, 2021 9 minutes ago, RoHo said: So for what in particular would it be worth doing with DIY FIRs with this device? Are there great gains to be had over what you can do with IIRs with this limited number of taps? I guess you can at least use the taps for FIR filters which make the mid/tweeter XO linear phase? Andy Link to comment Share on other sites More sharing options...
RoHo Posted December 6, 2021 Share Posted December 6, 2021 4 minutes ago, andyr said: I guess you can at least use the taps for FIR filters which make the mid/tweeter XO linear phase? Andy I guess so. Just thinking about my situation with my FIR capable 2x4HD. The main speakers have quite linear, but not horizontal , phase with a bit of a bend up after the XO. I have also used conventional IIR EQ on the sub. Are there great gains to be had using FIRs to flatten the mains phase or do the sub EQing? Link to comment Share on other sites More sharing options...
andyr Posted December 7, 2021 Share Posted December 7, 2021 15 minutes ago, RoHo said: Are there great gains to be had using FIRs to flatten the mains phase or do the sub EQing? I believe so. A mate who uses Roon on his Apple PC has B&W standmounts. When another mate created FIR filters (I think in Roon?) to linearise the XOs in the 805s and the subs ... the improvement was significant. Andy 1 Link to comment Share on other sites More sharing options...
davewantsmoore Posted December 7, 2021 Share Posted December 7, 2021 47 minutes ago, RoHo said: So for what in particular would it be worth doing with DIY FIRs with this device? Are there great gains to be had over what you can do with IIRs with this limited number of taps? The number of taps just tells you how low in frequency the linear phase FIR filter can operate. Eg. down to 300Hz, or whatever. The "advantage" of FIR filters is that you can modify the phase independantly of the amplitude..... but it is very non trivial to use this correctly in a speaker, as most amplitude corrections are either a ) minimum phase (ie. don't need any different phase correction), or b ) aren't accurately represented by your data, so if you correct both the phase and amplitude based on your data, it's probbaly the wrong correction. For a "room correction" .... then there are things where you would wasnt to correct the phase.... but again, the correction you want is not well represented by a single measurement.... which is why systems like Dirac Live, want multiple measurements so it can process them. 1 Link to comment Share on other sites More sharing options...
Grizaudio Posted December 7, 2021 Share Posted December 7, 2021 Some decent reading…. For those inclined…. https://eclipseaudio.com/fir-filter-guide/ https://www.prosoundtraining.com/2016/05/20/fir-ward-thinking-part-5/ Link to comment Share on other sites More sharing options...
Grizaudio Posted December 7, 2021 Share Posted December 7, 2021 (edited) Ideally you would need somewhere around 6000+ taps (without doing maths) for full bandwidth correction at 44.1khz sampling. This will greatly depending on the number of corrections, and Q's required. however Tap demands increase with higher sampling rates. PCs can achieve much higher taps with ease, making them (PCs) much more suitable for higher sampling rate FIR correction/ FIR crossovers. Edited December 7, 2021 by Grizaudio Link to comment Share on other sites More sharing options...
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