fierce_freak said:
Thanks. 🙂
Yes its been ordered and will be here soon.
I designed the board this way to it will fit end to end with the Buffalo, but space was also a factor. 🙂
Cheers!
Russ
Sorry to disturb you with a basic question.
I've received my LCDPS kit and a point is printed on the PCB for the choke orientation soldering. Can't find any sign/point on the choke itself... IMHO thinking it doesn't matter. I'm right or not ?
Thanks for the answer. 😉
I've received my LCDPS kit and a point is printed on the PCB for the choke orientation soldering. Can't find any sign/point on the choke itself... IMHO thinking it doesn't matter. I'm right or not ?
Thanks for the answer. 😉
"In fact here is a cool trick I am going to do today.
1) Setup two Opus in mono mode. When you do this one channel will be the same audio channel as the other but inverse phase.
2) Setup an IVY for each opus wiring each channel to an input on the IVY. You will get a mono balanced signal out of what is usually a stereo SE signal from the IVY. The balanced outputs of the IVYs are unused in this case. This should result in even better DNR. This is very similar to the way they do Dual mono in the data sheet, but should be even better! "
Hi Russ,
Is it possible to do this with 2 Ballsie modules? If yes, what would be the benefit of using the IVY instead of the Ballsie (no DC coupling/balancing resistors required, perhaps?)
And I thought I can finally sit down and listen to my Opus, but now I am curious to try this
How did the sound using one IVY compares with using 2 IVY's? 😀
1) Setup two Opus in mono mode. When you do this one channel will be the same audio channel as the other but inverse phase.
2) Setup an IVY for each opus wiring each channel to an input on the IVY. You will get a mono balanced signal out of what is usually a stereo SE signal from the IVY. The balanced outputs of the IVYs are unused in this case. This should result in even better DNR. This is very similar to the way they do Dual mono in the data sheet, but should be even better! "
Hi Russ,
Is it possible to do this with 2 Ballsie modules? If yes, what would be the benefit of using the IVY instead of the Ballsie (no DC coupling/balancing resistors required, perhaps?)
And I thought I can finally sit down and listen to my Opus, but now I am curious to try this
How did the sound using one IVY compares with using 2 IVY's? 😀
Yes you can do this dual mono trick with two Ballsies. 🙂 I have not tried it yet, and not sure I will have time to try it. You would not need coupling caps for the Ballsie as you would not be using the balanced output in this case. 🙂
To me it does sound slightly better than a stereo configured IVY. It just seems to add a bit of contrast.
I am thinking you would see similar improvement with the Ballsie, but I actually think the IVY is likely a better choice. But not having heard both I cannot say so with authority.
The down side is now you will have no SE output from these IVYs. 🙂 But fear not! There is a solution! Just use another IVY board but leave off the THS4131s. Just populate the components for BAL/SE conversion. Then use the balanced output terminals as inputs, and the SE output as usual. 🙂
:EDIT: One more note. To get 2VRMs out you need to setup the feedback Rs of the BAL/SE part of the IVY to be -6db gain. To do this just halve the value of R13-16 in relation to R9-12. So if R9-12 are 2K make R13-R16 1K. :EDIT:
Cheers!
Russ
To me it does sound slightly better than a stereo configured IVY. It just seems to add a bit of contrast.
I am thinking you would see similar improvement with the Ballsie, but I actually think the IVY is likely a better choice. But not having heard both I cannot say so with authority.
The down side is now you will have no SE output from these IVYs. 🙂 But fear not! There is a solution! Just use another IVY board but leave off the THS4131s. Just populate the components for BAL/SE conversion. Then use the balanced output terminals as inputs, and the SE output as usual. 🙂
:EDIT: One more note. To get 2VRMs out you need to setup the feedback Rs of the BAL/SE part of the IVY to be -6db gain. To do this just halve the value of R13-16 in relation to R9-12. So if R9-12 are 2K make R13-R16 1K. :EDIT:
Cheers!
Russ
Russ,
So if I use IVY with the Opus, I can bypass the DC blocking caps on the Opus board, correct?
So if I use IVY with the Opus, I can bypass the DC blocking caps on the Opus board, correct?
LCDPS kit works fine, voltage set to 15v at the 2 outputs.
I've connected the 2 GND and + to the Opus module.
Just wondering about connexion between USB module and Opus.
On the USB module I've set jumper in I2S mode.
I must tie DO to DI too. Is it correct ?
BCK-SCK-LRCK-G(GND) must be interconnected from Opus to USB ?
DIN pole on Opus will be connected or not ?
If yes, connected to DI from USB ?
Nice to read you.😉
I've connected the 2 GND and + to the Opus module.
Just wondering about connexion between USB module and Opus.
On the USB module I've set jumper in I2S mode.
I must tie DO to DI too. Is it correct ?
BCK-SCK-LRCK-G(GND) must be interconnected from Opus to USB ?
DIN pole on Opus will be connected or not ?
If yes, connected to DI from USB ?
Nice to read you.😉
korben69 said:
15V is a bit hot for LCDPS. I would set it to 7.5V each output.
USB -> Opus wiring is as follows
BCK, SCK, LRCK, DOUT, G from USB to BCK, SCK, LRCK, DIN, G on Opus
The DIN spot on the USB is to loop the I2S back into the USBs internal DAC so you can use its analog output and the Opus output at the same time. Its use is completely optional. To use it just run a short wire fron DOUT to DIN on the USB module and then you can use the USB analog output when the USB module is in I2S mode. Otherwise, the USB analog output is disabled in I2S mode.
Cheers!
Russ
Thanks Russ. 😎
Voltage set to 7.5v.
Connected as you confirm.
BTW conecting DO (USB) to DO (Opus) give the same result with USB in I2S mode while DO is short circuited to DI on USB module.
Now I'm wiring XLR output on the Opus...
Hope it will sound quickly 🙂
Voltage set to 7.5v.
Connected as you confirm.
BTW conecting DO (USB) to DO (Opus) give the same result with USB in I2S mode while DO is short circuited to DI on USB module.
Now I'm wiring XLR output on the Opus...
Hope it will sound quickly 🙂
BrianDonegan said:
Does this mean that the WM8805 based module is shelved? Im guessing this chip is more capable, but I was hoping for more inputs 🙂 I know there is a space limitation though.
MrMajestic said:
It may come at some point.
The problem with WM8805 is that like the WM8804 its not very intuitive to support both 192khz and 176.4khz, in fact its a huge pain. It also does not support hardware mode with multiple inputs. In hardware mode you can only use a single input.
So we decided it was more practical to do the CS8416 mux first. I have always been happy with the performance of the CS8416 in any case.
Cheers!
Russ
Is this new receiver available soon ? Currently, your dpnÄt have any receievers at all avilable, I believe you said they will be sonn again...in the pld or new version ?
A question on the USB-receiver: How is the driver-support ? How do you get rid of Kmixer in XP ? Normal Asio-Cards have their drivers, but only output SPDIF, not USB. The benchmark guys (DAC-1) where talking that there are ways to get around the re-mixing of kmixer even when you use USB, bt they did not say how.
A question on the USB-receiver: How is the driver-support ? How do you get rid of Kmixer in XP ? Normal Asio-Cards have their drivers, but only output SPDIF, not USB. The benchmark guys (DAC-1) where talking that there are ways to get around the re-mixing of kmixer even when you use USB, bt they did not say how.
We are just waiting for boards for the receivers. Could be any day.
The USB board uses native USB audio drivers, so nothing to install. It works with 2000/XP/Vista and MAC OS.
You can get around the KMixer the standard ways: ASIO4ALL and a program like WinAmp or Foobar2000
The USB board uses native USB audio drivers, so nothing to install. It works with 2000/XP/Vista and MAC OS.
You can get around the KMixer the standard ways: ASIO4ALL and a program like WinAmp or Foobar2000
Maybe i'm asking for something very obvious but how wil the input selection on the new receiver board be done? Could this be done by the OPUS uber controller? Any timeframe for release of this last piece?
Regards,
Lucas
Regards,
Lucas
I have observed the sampling rate coming out of a PC and determined that kmixer will not be invoked if you don't have any other sources of sound (obviously), so if you set your iTunes in a PC to play at 44.1 KHz and turn off all system sounds, then you will get 44/1 KHz indefinitely. But if your skype would ring while your are playing music (not sure if you can turn that off), then kmixer will be invoked and "mix" the two sounds -but I have not yet observed the resulting sampling rate (in theory is 48KHz)
Lucas Unger said:
There is a four pin header on the board which will allow you to select source with something as simple as a rotary switch, or a uC such as the AC1 (aka Uber).
PC sample rate / Kmixer
This is interesting and consistent with what I've heard (but not confirmed by any other means). Can I ask about the nature of your experiment? It may help those of us who will be configuring Opus boards (at least in part) for computer input. I hope to begin by using hardware mode w/ direct I2S input.
In my observation, with all other sounds turned off, ASIO actually sounds a little more harsh than DirectSound (through the AK4355s on my old sound board). It will be interesting to see if that changes once I get the new Opus boards connected. The other reason I'm using DirectSound output is because every software crossover I've tried refuses to play nice with foo_out_ASIO. [They all work with DS while ASIO works without them - together they just won't cooperate to correctly route component signals.
In my system, btw, the best sounding XO is foo_dsp_xover rolling no more than 4 db/octave. It is IIR, but sounds much more robust than any FIR implementation I've been able to try.]
Best to you all,
Frank/Mpls.
glt said:
This is interesting and consistent with what I've heard (but not confirmed by any other means). Can I ask about the nature of your experiment? It may help those of us who will be configuring Opus boards (at least in part) for computer input. I hope to begin by using hardware mode w/ direct I2S input.
In my observation, with all other sounds turned off, ASIO actually sounds a little more harsh than DirectSound (through the AK4355s on my old sound board). It will be interesting to see if that changes once I get the new Opus boards connected. The other reason I'm using DirectSound output is because every software crossover I've tried refuses to play nice with foo_out_ASIO. [They all work with DS while ASIO works without them - together they just won't cooperate to correctly route component signals.
In my system, btw, the best sounding XO is foo_dsp_xover rolling no more than 4 db/octave. It is IIR, but sounds much more robust than any FIR implementation I've been able to try.]Best to you all,
Frank/Mpls.
After reading a ton of stuff with no clear indication when would kmixer change the sampling rate, i decided to try it out myself. I like iTunes, but I use PCs (cheaper to build). I have a low end sound card with optical out that uses the cmedia chip and downloaded a bit perfect driver from http://code.google.com/p/cmediadrivers/. I have an old DAC that shows the input sampling rate: 44.1, 48, 88, 96. Then I played content which I knew its native sampling rate and observed the incoming sampling rate. I don't remember the details but I was getting what I was expecting no mater what I was doing in the computer. Only if another sound was involved did the sample rate change. However, for my permanent set up I use itunes to airport express and then optical out to OPUS receiver (this solutions is also bit perfect, but only works with iTunes)