You're probably referring to Canare BCJ-XP-TR[ABC], those are working beautifully for me. Have you tried connecting your TV to input 1? Are you sure that your TV is sending a PCM signal? Is there any signal on input 1 while you have the TV connected to input 2 (if so, they need to be synchronized - not sure what to expect if they aren't)
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Review and Measurements of Okto DAC8 8Ch DAC & Amp
- Thread starter amirm
- Start date
Anyone using multi-channel input via AES? I have a strange issue with intermittent pops even w/o a change in sample rate. The frequency is much higher with 96kHz content than with 48/44.1 kHz content. Interestingly enough, I don't think this happens on output channels 1 & 2. My DAC8 is connected to a Trinnov processor. I am wondering if anyone else has experienced this.
mdsimon2
Major Contributor
Yes, with some sources I have experienced this, others work perfectly, it was discussed in the owners thread, see link below.
Okto 8 Owner’s Thread
ASIO4ALL is a very unique ASIO software which act as one virtual audio device, and it also sits in front of all of the other ASIO drivers to redirect ASIO routing very much flexibly. You need to install, therefore, all of these to establish the extremely flexible I/O in 192 kHz 24 bit; VB-Audio...
www.audiosciencereview.com
It seems that a firmware change at some point caused these issues, I hypothesized it has something do with the DPLL bandwidth but I am not sure.
Michael
mdsimon2
Major Contributor
x2
The Okto has no ASRC and expects all inputs to be synced to channels 1/2.
Probably best to have some sort of source selector upstream of the Okto.
Michael
phoenixdogfan
Major Contributor
Which means I can't have two different sources plugged into two different inputs. Disappointing, but I do a an RCA Switcher, so maybe I can figure something out. I suppose I would be ok plugging a spdif cable into say, the left input on the switcher and as long as the spdif going out the the Octo is also plugged into the left output of the switcher?
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Or ask Pavel to make a single input (or source routing presets) selectable via remote control. I've been looking for an AES/EBU switch, and given the price of these things, I'm tempted to just buy the BM option for my DDRC-88D and use that just to switch inputs.
I think you can have them plugged in, but you'd probably have to make sure only one is active (i.e. not just muted, there must not even be a clock signal)
mdsimon2
Major Contributor
I use an OpenDRC-DI as a source selector, definitely overkill as I use no DSP functionality but I already had it on hand.
I haven’t done it but it seems like you could also use an U-DIO8 as an ASRC to sync different sources.
Michael
Hi! Could need some help with my new Okto DAC8 streaming version:
Streaming works fine with Volumio software, also USB input from PC, but I don't get any sound using the digital inputs (coax and optical), the pause icon doesn't jump to play. I've tried to connect different devices (CD Player, Bluetooth adapter,...). The input is set correctly and it's not muted. Any ideas?
No answer from Okto so far...
Streaming works fine with Volumio software, also USB input from PC, but I don't get any sound using the digital inputs (coax and optical), the pause icon doesn't jump to play. I've tried to connect different devices (CD Player, Bluetooth adapter,...). The input is set correctly and it's not muted. Any ideas?
No answer from Okto so far...
dartinbout
Active Member
- Joined
- Jan 15, 2020
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Hi, Okto,
Do you have any suggestions as to how to route a subwoofer, with only an RCA input? It is part of a suite of Paradigm Studio 7.1 speakers and I want to keep the synergy of a matched set for playing multichannel DSD files.
I just purchased a used DAC8 Pro from Ebay. After decades, this is exactly the piece of kit for which I've been searching.
The headphone out is CH1+CH2 analog RCA TRS OUT under the preamp control including gain/volume. You may use TRS-RCA adaptor to RCA connection to your sub-woofers; please refer to this post. I use this route in RCA connection to L&R sub-woofers in my 5-way 10-channel setup; please refer to this post and also this post #636.
Another option is to use AES/EBU digital out (CH1+CH2 digital through) into AES/EBU IN capable second DAC (in sync by AES/EBU clock signal) with RCA analog out. Please refer to this post. This option, however, is out of the DAC8PRO's preamp functionalities; you cannot control the gain/volume by DAC8PRO.
The third option, even though not fully recommended, is to use XLR-RCA adaptor/cable of No. 3 floating (not connected) like this one; you will lose 6 dB gain in this case and possibly a little bit higher distortion/noise/on-off-pop level but should be almost OK for sub-woofer with its own gain/volume. Please refer to this post and this post. Pavel of OKTO commented this issue here.
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Pick a Neutrik adapter to taste:
NA2FPMF or NA2FPMM
We should be careful enough about some of the XLR-RCA adaptors have No.3 connected to ground (No.1) which may cause problem and/or damage to DAC8PRO.
We have so many XLR-RCA adaptors/cables with all pin connected (I mean No. 3 to ground=RCA's outer shell); in this case we can just cut the No.3 line at the XLR side to make it floating.
Some of the transformer type XLR-RCA adaptor may work, but we always have "possible" sound quality (and/or phase) deterioration issues with these transformer type adaptors; again I assume this would not be a major issue in case of sub-woofer operation.
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Neutrik adapter:
"Wired according to IEC 268-12:
Pin 2: signal
Pin 1 and 3: connected to ground"
So that's the standard way to connect this.
How could that damage the DAC ?
If that's the case, there is a design issue, IMO.
EDIT: Ok, I see in the post you linked that the fear is increased distortion.
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Yes, you would please carefully read Pavel's comment (#557 there) on this issue.
DAC8PRO is actually designed for professional (i.e. fully balanced XLR out) use, I believe.
This issue has been repeatedly discussed in this thread and other places.
phoenixdogfan
Major Contributor
I'm using this:
Between the natural room gain I have and using Dirac Live, losing 6db of gain is not an issue. Whatever added distortion this creates in the sub's output is likely inaudible as well.
Benchmark XLRF to RCA Adapter Cable for Analog Audio - pin 3 floating
Benchmark Studio&Stage™ Analog XLR Cables CABLES ARE SOLD INDIVIDUALLY Price is for one cable, order 2 for a stereo pair. Hand assembled in the USA with true silver solder Benchmark Studio&Stage™ Analog XLR Cables combine the best cable, connectors, and construction techniques in order to offer...
benchmarkmedia.com
I am intrigued by the idea of using a TRS to RCA converter and running the subs from the headphone out. My question is will this provide sufficient gain, and is volume controllable to both the XLR outs and the headphone outs simultaneously, In other words, is this solution seamless?
And how do you even route that, so the low passed signal to the sub and only the low passed signal to the sub goes to the headphone output, especially when the source is an 8 channel USB signal?
Ah, I see you are using input channels 1-2 which route to the headphone output. Of course most USB software like JRiver defaults L-R to the input channels which means you have to have a way to control the routing of your digital source which Ekio does with its matrix, but other software options may lack that capability.
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I'm using this:
Between the natural room gain I have and using Dirac Live, losing 6db of gain is not an issue. Whatever added distortion this creates in the sub's output is likely inaudible as well.
Benchmark XLRF to RCA Adapter Cable for Analog Audio - pin 3 floating
Benchmark Studio&Stage™ Analog XLR Cables CABLES ARE SOLD INDIVIDUALLY Price is for one cable, order 2 for a stereo pair. Hand assembled in the USA with true silver solder Benchmark Studio&Stage™ Analog XLR Cables combine the best cable, connectors, and construction techniques in order to offer...
I am intrigued by the idea of using a TRS to RCA converter and running the subs from the headphone out. My question is will this provide sufficient gain, and is volume controllable to both the XLR outs and the headphone outs simultaneously, In other words, is this solution seamless?
And how do you even route that, so the low passed signal to the sub and only the low passed signal to the sub goes to the headphone output, especially when the source is an 8 channel USB signal?
Ah, I see you are using input channels 1-2 which route to the headphone output. Of course most USB software like JRiver defaults L-R to the input channels which means you have to have a way to control the routing of your digital source which Ekio does with its matrix, but other software options may lack that capability.
Hello again, phoenixdogfan,
Yes, you are right. The Benchmark's pin-3-floating XLR-RCA cable is identical to the Emotiva's short adaptor cable.
Headphone out of DAC8PRO is always active together with CH1+CH2 XLR out; yes, this is seamless solution to feed sub-woofers with line-level signal with RCA cable.
As you pointed, I use very much flexible software XO/EQ "EKIO" which can configure the crossed-over sub-woofer Fq range (15 Hz - ca. 60 Hz, in my case) into CH1+CH2 analog XLR out simultaneously together with into the headphone out, as I shared here.
You would please carefully look at my latest setup with EKIO using headphone out (CH1+CH2) TRS-RCA into L&R active sub-woofers, Yamaha YST-SW-1000; seamlessly and under the volume/gain controller of DAC8PRO.
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Hello again, @sq22597,
I believe not always so...
This issue is also related to the complexities of the possible "ground loop" problems, e.g. as intensively discussed here in ASR Forum.
"Pin 3 to ground" may cause unexpected problems not only in the DACs but also in the amplifiers, and the issue is related to the handling of the "ground" in the DAC and amplifier; in some cases the "ground" is floating (I mean not connected to the chassis), in some cases the "ground" is connected to the chassis in "DAC and amp"; it is possible that the "ground" is connected to the chassis in the DAC but not in the amp, and so on.
Even though I am not an expert in audio signal processing, I can understand the complexity of this issue which depending on "ground" handling in DACs as well as in amplifiers, and there is no consistency (or standard rules/regulations) in "ground" handling in audio gears.
Consequently, I still assume/believe "pin 3 floating/not-connected" should be the best and safe solution for our current discussion on XLR-RCA adaptors with DAC8PRO, even though not highly recommended.
I really would like to recommend the use of headphone-out with a TRS-RCA adaptor into sub-woofers, if one can configure XO/EQ Fq range for DAC8PRO's CH1+CH2 into sub-woofers.
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