 Mijn enthousiasme voor DRAC zou al zijn gekozen, maar ik heb nog steeds een makkelijke en makkelijke solution gevonden voor een kwaliteitstereose setup zoals mijn setup 1. Ik heb nu. Voor die die mijn andere video's op DRAC niet hebben gezien, laat ik jullie mijn neus op de ruimtecorrectie systemen geven. Overigens heb ik veel ruimtecorrectie systemen gezien en meest van die hebben me niet gezien. Het is geweldig om ruimtemode's te correcten die probleemden met hoge frequenties. Maar dat koopt alle soorten filternarsies in de audioband, het is niet een prijs dat ik wil betalen. En op de prijs, vaak was de prijs me ook te stoppen. Als ik DRAC in de NADT758 versie 3 ontdekte, ging ik voor een DRAC solution op de kwaliteit van mijn reference setup 1. Mijn eerste attempt was de DRAC software solution. Ik installeerde Windows 10 en DRAC Live op de Intel NUC 7i7 B&H computer, op de 3e deel, alleen om te vinden dat er geen manier is om het op te hoeken naar de SOtM netwerkbrits in de livingroom op de grondvloor. De NUC heeft een Core i7 processor die met serieuze schoeningen nodig, dat maakt het moeilijk. Een funnelige cache voor de 7e generatie NUC, met Core i7, appears te bevinden om te vinden op dat moment, dus ik consulteerde met DRAC om een solution te kennen. Ze suggesteerden de Mini DSP SHD Studio, waar SHD stond voor streaming, hoog definitie en studio betekent dat het alleen digitale input en output heeft. Er is ook een versie die een analoge input en output heeft naast de digitale. Ik vond audiophonische Franse willen me een studio versie lopen voor een langere tijd, zodat ik het extensief mee zou beperken. Om volledig versie te geven, audiophonische heeft geen influentie op de editorie, maar ze willen ook niet. En ik krijg niet geld voor uniten gevolgd. Dit is een indipende journalistische productie. Ik moet ook zeggen dat ik nu de Acasa funnelijke cache vond en we zien hoe de software alleen de DRAC versie werkt op die tijd. De primaire functie van de SHD Studio is om de proces te doen voor de direct-live-room-correctie software. Laten we daarvoor zien hoe de hardware is opgezet. Een van de digitale outputen van de SHD Studio is verbeterd tot de input van een digitale analoge converter. Dit kan een standaard loondiveis zijn, maar kan ook geïntergteerd worden in een amplifier of receiver. Boot SPDIF en AES-ABU zijn er. Als je active speakers gebruikt met digitale inputen, connecte je de SHD direct tot de speakers. Maar sinds de meeste mensen hebben passive speakers en een amp, gebruik ik ze hier. De netwerkpoort op de SHD Studio kan verbeterd over een netwerkkabel via de router naar de internet voor streaming van services zoals Tidal, Kubus of als je wat leraar kwaliteiten, Spotify en alle soorten internetradio stations. Als je muziek in je computer of nas speelt, kan dat ook over de netwerk geplaatst worden. Maar je kunt ook een hartstikke harde muziek schrijven. In alle cases controlen je de streamingfunctie van een smartphone, tablet of computer. Alle sources zijn verbeterd tot de digitale inputen van de SHD Studio, een computer direct over USB, een digitale speler zoals een CD-speler over SPDIF of een tv over Toslink. En dan zijn de AES-ABU digitale inputen nog niet gebruikt. En als je wilt, kun je ook 1 of 2 active subwoofers gebruiken met je besproken crossoverfrequencies. De SHD Studio komt in een sterde metalhuis dat in studio termen een unit hoog en een half width maakt. Voor gebruiken in de livingroom, dit betekent 214 x 206 x 42 mm. Aan de front zien we een rotaire encoder die je door de menu's scrollt om te pushen en te turnen en selecten een optie om te pushen weer. Houding het voor 3 seconden muziek de output. Ik kon niet een power switch of standby functie vinden. De display clearly reports the status, attenuation, meaning volume, de chosen direct filter, onwhich later more, de direct logo dat indikates if direct is activated, de chosen input en de logo voor active or muted output. On the rear left we find the 12 volts DC input to connect the supplied switch mode power brick to. Then a USB-A socket to connect a storage device to, the network socket and the USB-B socket for using the mini DSP as a soundcard for the computer. Furthermore 3 digital inputs, optical, spidive en AES-EBU. On the right double outputs on spidive and AES-EBU. To measure your room you need a measurement microphone. The mini DSP you make one I use comes with a calibration file and therefore is a good and affordable choice. It needs to be ordered separately but it's a lot cheaper than other measurement microphones I own. You also need to download software for the mini DSP site amongst it the direct live version for mini DSP. You need to use the voucher code that comes with the unit. It still is the old 1.2 direct version and I couldn't get an answer on if and when version 2 will become available and if it will be compatible with the SHD studio. I wouldn't lose any sleep over it, although version 2 looks nicer and slightly easier to use, version 1.2 does get the job done and you only need to use it once. See my video direct live on the NAD T758 version 3 on how the measurements are done. For the mini DSP it works the same, with the exception of the number of measurements. Since the NAD was set up as a 7.1 channel system, it needed 9 measurements per microphone channel, 2 for the left and right, 1 for center, 4 for surround and back and 1 for the sub. An external measurement is done to gather time information by using a slightly different sampling rate. The mini DSP is a two channel device so only 3 measurements per microphone position are done and there is another difference with the NAD. The direct live software can't connect to the mini DSP over the network. You need to connect a computer that runs direct live to the mini DSP over USB 2. Optionally, there is an accessory named YGD Wi-Fi station that will enable connection over Wi-Fi, but again, measurements only need to be done once. Wanneer de measurements are done, you might end up with a picture like this. You might now think that direct needs to form that to a straight line at 0 dB, but that's not the case. A curve like the red line is generally preferred. Don't forget that after applying direct to the signal, room modes are compensated for and thus the energy built up they cause. A slight boost at the low end will prevent a thin sound. On the high end of the spectrum, a mild compensation for the loss through the air is needed. When the software optimise the filtering for your room, a frequency response that follows the target is shown. Please note that this is not the corrected real world frequency response by the calculated result. What you see here is the result of my living room using setup 1. You can alter the target response by clicking on the line, a dot will show up and can be moved by mouse to build any curve you like. For texting purposes I made a curve that has the lows boosted by about 60 b's below 200 Hz and one that boosts the lows with 90 b's. Our report on the resulting sound further on. Once a filter has been optimised, it can easily be copied to the Mini DSP in the same way it works with the NAD receiver. The Mini DSP also has four slots so you can use four different optimisations, for instance optimised for one single position, one single position with low boost, large area optimisation and large area optimisation with low boost. For serious headphone users Mini DSP sells a headphone calibration kit for selling money to them. Next to the direct filtering, the SHD studio can apply other filtering. The manual spends about 20 pages to all kinds of filtering. User programmable IAR filters, high pass and low pass crossover filters up to 48dbs per octave per output channel, 10 b-quad filters, parametric EQ per output channel, peaking low shelf and high shelf types. There even is a compressor for those that find current music not compressed enough. I restrict myself to two applications. Since the SHD studio has two digital stereo outputs and a built-in matrix, it is possible to use it as a crossover where the output 1 and 2 feeds the main speakers and output 3 the subwoofer, both filtered according to the settings you made. Even two subwoofers can be used this way. It of course means that you do need an extra DAC for the sub channel unless you use the SHD full version with analog in and outputs. A second application might be to use it with B-amping, so with a stereo amp for the highs and a stereo amp for the lows. The active crossover can be done by the Mini DSP while at the same time providing direct room correction. All processing is done and outputted at 96 kHz 32 bit but the SHD studio accepts PCM signals up to 192 kHz 32 bit. Wants the filters are uploaded, operating the SHD studio is really simple. Choose an input and a filter setting. That can be done on the front of the unit using the supplied infrared remote, a free iOS or Android app on a smartphone or tablet, a Logitech Harmony remote entry is available and even Alexa voice control aka Amazon Echo is supported. En if that's not enough, you can learn it infrared codes from your own remote control. But if you go to use the built-in streamer, which by the way is the ever so popular Volumio, you need to use another app or a browser. The full filters can be loaded by a simple press of a button, after which the sound is muted until the new filter is loaded from the internal memory. Switching direct on and off is something you only do the first day. Even when friends visit you, of course. After that, direct will probably never be switched off again. I mentioned earlier that despite only direct live version 1.2 comes with the unit and not a new version 2, that is available for the NAD receiver, I still did a review. The reason is that, at least in my set of 1 and 2, the impact on the sound was shockingly good. I love MQA and the sound improvement it gives, but this was so much more. It really kills all room modes if you like, even beyond the point that I find comfortable. Choose for one single listening hotspot and move the mic during measurements only in small distances say 20 cm 8 inches and you really get a very dry sound. By trial and error I got the most pleasing sound result in my situation and to my ears when moving the mic about 50 cm or 20 inches between measurements. That make the lows very rich while tone texture was extremely good and the lightness was preserved. The deep lows were far more impressive while the mid lows opened up completely. And the best thing is that the mids and highs were free of even the slightest filter nasties. It's direct live as I know it from the NAD, only at a higher audiophile level. I initially tested it connected between the SOtM SMS-200 Ultra Neon Network Bridge and the MiTech Brooklyn DAC, but when I tested the Volumio Streamer in the Mini DSP I heard no difference in sound quality. Although I was sure that the mids and highs were as good as when connecting the SOtM directly to the Brooklyn DAC, I compared the SOtM Brooklyn combo against the Volumio over the Mini DSP to the Brooklyn. Only to find them equal apart from the low end of course. This means that the Mini DSP Volumio combination sounds as good as the SOtM Roon combination. In the past Volumio did support Roon on the project streamer for instance, so I contacted Volumio to hear that Roon Ready is on the roadmap but didn't get any release date. Then about the two other curves I had made. Quality wiser didn't make any difference. De low end was just boosted. For most classical music, rock and pop of the last 20 years, the first version is my preferred choice. The one with about 5 to B low boost sounded more agreeable on all the pop and rock records, especially those that stem from the analog studio era and that were not remastered. It is also pleasant for when I play at low level as a kind of loudness compensation. De plus 9 dB version was just too much in all cases. A short remark on MQA. Since the audiophile is changed, MQA files will not be rendered by an MQA DAC like the Brooklyn. Using Roon, I could have the MQA files decoded so they play in the original sampling rate up to 96 kHz. Volumio can't do that. As the improvement in sound quality direct brings is so much higher, I am happy to sacrifice MQA for direct. But if there is a chance to have both, I'll be on pole position to review that. The SHD studio cost about a grand including sales tanks. The analog version cost 40% more. If you don't need Roon ready functionality and like Volumio, you buy an extremely good sounding streamer or rather a streamer that doesn't deteriorate the sound and feeds the DAC with a very high quality digital signal. Two improvements would be great. Next to the Roon compatibility a menu option to fix the volume at 100%. Volumio is relatively basic software compared to Roon but it's quick, it's very easy to operate and doesn't do the sound any harm. And then the hardware. It obviously does a shockingly good job, especially if you consider the functionality and the price. It's these kind of gems that makes me very happy in my work. And I really want to thank Audiophonics for allowing me to experiment with it for a long time. No strings attached. I'll put a link to them in the show notes. As always I challenge other manufacturers to lend me equipment they think is equal or better. Last week I will try to get another review online and if you don't want to miss that, subscribe to this channel or follow me on the social media so you know when new videos are out. If you like this video, give it a thumbs up. Many thanks to all that support the channel financially. It keeps me independent and thus trustworthy. If you also feel like supporting my work, links are in the comments below this video on YouTube. I'm Hans Beekhuyzen, thank you for watching and see you in the next show or on the DHBproject.com. En whatever you do, enjoy the music.