JP
Major Contributor
Yikes! 18 weeks, yikes! Almost as bad as the A16 Realiser.
Ha. My A16 was 210 weeks and a day.
Yikes! 18 weeks, yikes! Almost as bad as the A16 Realiser.
I also use Dirac Live which can necessitate lowering digital gain by as much as 10db.Do not know anything about custom voltage other than the website saying you can get custom voltages from 1V to 12V.
Not sure why you would want an output voltage above 12V as I imagine all that would do is force you to lower the volume (and reduce SINAD as a result). I am not super familiar with Purifi but I assume your plan is to bypass the pre-gain so you only have a gain of 13 dB in the amp? Seems to me like 12V would be plenty in this case as you would still be able to drive the amplifier to full power. That being said not sure how often you change gear but having a 12V output voltage is excessive for most typical power amplifiers with 25-30 dB voltage gain.
In terms of fulfillment time I ordered a DAC8 Pro in the beginning of September and have not received it (~18 weeks to date). I am told it should be completed soon.
Michael
I also use Dirac Live which can necessitate lowering digital gain by as much as 10db.
I agree with mdsimon2, you are making a mistake with the gain structure here. There is no reason to have the DAC8 FS output greater than the sensitivity of your amp regardless of Dirac.I also use Dirac Live which can necessitate lowering digital gain by as much as 10db.
For me, it was apparently exactly 19 weeks - but the courier didn't ring the doorbell but instead dropped the package off at a store down the hill, and I'll have to pick it up tomorrow.Yikes! 18 weeks, yikes! Almost as bad as the A16 Realiser.
It runs off my PC.The reason you may need to lower the gain with Dirac Live is that it can boost up to 10 dB, however the whole point of this is to make sure that your output will not exceed 0 dB. Assuming that you have Dirac Live implemented upstream of your DAC you will still be able to get 12V out of your DAC even if you cut the level in Dirac (preferably by exactly the amount of boost that Dirac has applied, so not necessarily 10 dB) but it will only occur at the frequencies you have boosted.
Which product are you using that has Dirac?
Michael
I bought mine new last January. It kept locking up so, I sent it back January 28th, and did not receive it back until after labor day. Had to send it back a second time and it came back within a month. Now I'm getting ready to do my first 24 channel PRIR using my LS 50s+ SB2000.Ha. My A16 was 210 weeks and a day.
What air freight company did that? Did you instruct them to use that as a drop off? How did they know it would get to you? WTF!For me, it was apparently exactly 19 weeks - but the courier didn't ring the doorbell but instead dropped the package off at a store down the hill, and I'll have to pick it up tomorrow.
It was those guys: https://gls-group.eu/ and no air transport was involved. I haven't communicated with them in any way whatsoever, and they just dropped a postcard with a note to pick it up on the next day in my mailbox.What air freight company did that? Did you instruct them to use that as a drop off? How did they know it would get to you? WTF!
It runs off my PC.
Do you use the PC as volume control? If so I wouldn't worry about Dirac boost at all.
If you are doing downstream volume control I would measure the actual Dirac boost you have applied with your PC using a loopback in REW and adjust the input level down by the boost amount. I am not currently using Dirac but when I was I measured an actual boost of less than 5 dB so a 10 dB cut is likely excessive.
Michael
The cheap option would be to combine a few consumer TOSLink/S/PDIF converters with e.g. Canare BPJ-XP-TR[ABC]. You can skip the BPJs for short cable runs, like 1 or 2m. Personally, I've considered buying a second hand Z Systems detangler, e.g. the Z-8.8, those are/were available with arbitrary combinations of in/outputs. http://www.z-sys.com/pp_routing.html
Hello Vasr,
OK, now I understand that you would like to have some switching/distribution mechanism in speaker level signals after the amplifiers.
In Hi-Fi level sound quality scene, you need to be very careful to avoid any degradation in speaker level.
Recently, I also intensively tried and experienced this kind of switching/distribution in speaker level signals in my multichannel project where I need to switch "single-amp system" and "multi-amp system" with one common speaker system.
After my intensive try-and-error on this issue, my current "physical" solution is a very primitive "SP Cabling Board";
View attachment 75324
As wrote in the above image, I once tested "Multiple-Terminal Electromagnetic Switching Relay" with remote controller and also "Multi-Terminal Snap-Toggle Switch" to switch the SP cabling connections. Both of them worked physically and functionally perfect; I found, however, audible slight degradation in sound quality was caused by these "Relay" and "Toggle Switch".
Then, I finally reached my definitive conclusion that the "physical screw-up of the cables" on terminal block is the best solution with completely no degradation of the signals in Hi-Fi system.
After reaching this conclusion, I searched and investigated a lot about the reasons for the degradation of the signals by those electromagnetic relays and toggle switches, and I found that these relays and switches have rather strong eletromagnets and/or permanent magnets in it, even toggle switches have tiny permanent magnet to "divert" possible ark spark from the contact metal plates, and these tiny but strong magnets are mal-affecting if the SP level audio signals would be switched by them.
I believe you may have, more or less, this kind of magnetic mal-affection on your SP level signals even using any of "consumer or professional audio switching gears" for SP level signals.
I am sorry that at present I cannot suggest best solution for your demands, but in Hi-Fi level audio, the switching of SP level signal should be handled very carefully, otherwise you would have audible degradation of the signal.
My present suggestion is that you should avoid any switching in SP level signals in your system, and you would be better to re-consider to have digital switching mechanism before the signals go into the DACs.
I found (and Pavel of OCTO confirmed) that you can achieve two DAC8PROs in sync manner by connecting first DAC8PRO's AES/EBU digital OUT (CH1+CH2) into second DAC8PRO's AES/EBU digital IN, and both DACs still can work as 8 channel USB DAC, and you would have 16 channel DAC port available for flexible output routing for 16 channel amplifiers. I assume this 16 channel DAC operation could be another possible solution for you.
The cheap devices that just have TOSLink in and S/PDIF out and no analog or HDMI in- or output are unlikely to mess with the data, I'd assume they just copy bit for bit from in to out. "Multichannel" with respect to the DAC8 will always mean 2 channel PCM or DSD on each AES/EBU input, i.e. no Dolby or DTS, so assuming you're talking about potential issues with multiple consumer grade converters connected to the inputs of the DAC8: I wouldn't anticipate any issues there either, since there should be little if any variation between them. I don't know about the sample rates that are supported by any of these devices, including the various models of the Detangler.The detangler is a nice solution but the additional price to pay is a little steep. The consumer converters you mentioned can keep a digital stream of multichannel audio intact?
The cheap devices that just have TOSLink in and S/PDIF out and no analog or HDMI in- or output are unlikely to mess with the data, I'd assume they just copy bit for bit from in to out. "Multichannel" with respect to the DAC8 will always mean 2 channel PCM or DSD on each AES/EBU input, i.e. no Dolby or DTS, so assuming you're talking about potential issues with multiple consumer grade converters connected to the inputs of the DAC8: I wouldn't anticipate any issues there either, since there should be little if any variation between them. I don't know about the sample rates that are supported by any of these devices, including the various models of the Detangler.
The going price for a ZSys 8.8 seems to be about $200. If you don't need any switching, that's obviously a steep increase over 4 converter boxes for $15 each. This one might be pretty close to what you want, you would just have to haggle over the price: https://www.ebay.com/itm/324265780669
And I assumed you had a device that had multiple TOSLink outputs for e.g. 7.1. You TV should be perfectly capable of downmixing anything it can reproduce to 2 Channel PCM on a single TOSLink output, there should be an option somewhere in the setup menus to switch between "bitstream" (or similar) and PCM.Oh I see. Actually my idea was to downmix 5.1/7.1 coming from TV to stereo, in addition to my main setup. Looks like it can't be done so easily on a single input. Did somebody try to do something similar?
@dualazmak, interesting. Are the 2 combined Oktos seen as one 16 CH soundcard in Windows when connected via USB?
And I assumed you had a device that had multiple TOSLink outputs for e.g. 7.1. You TV should be perfectly capable of downmixing anything it can reproduce to 2 Channel PCM on a single TOSLink output, there should be an option somewhere in the setup menus to switch between "bitstream" (or similar) and PCM.