I see new boards are being developed, but wonder how the beta testers like it. How does it sound?
Russ
I plan to build a preamp for my mini Aleph's incorporating the Opus, I am struggling with locating a balanced volume control (I will use your Joshua Tree on my Twisted XBOSOZ for my Aleph 30), but for this I would like something different. Have you considered a digital volume control similar to the Meridian 518? I have a friend I loaned one of my Mini Aleph's to and that is what he is using and he refuses to return it , he prefers it to his Sonic Frontiers amps.
A Twisted Pear Audio fan
Bill
I plan to build a preamp for my mini Aleph's incorporating the Opus, I am struggling with locating a balanced volume control (I will use your Joshua Tree on my Twisted XBOSOZ for my Aleph 30), but for this I would like something different. Have you considered a digital volume control similar to the Meridian 518? I have a friend I loaned one of my Mini Aleph's to and that is what he is using and he refuses to return it , he prefers it to his Sonic Frontiers amps.
A Twisted Pear Audio fan
Bill
Does anybody find the WM8740 hang when power on sometimes?
Hi, Russ
I had build your project, it sounds great! But there is a little problem in my DIY,
the WM8740 does not work somtimes! The chip will work only if I power down and up the board one or more times. then, I can get the output from the chip.
Notes, the CS8416's LED's status is alway good, and I had build two borads, both of them are the same.
Did anybody find the problem?
Thanks
James.shang
Hi, Russ
I had build your project, it sounds great! But there is a little problem in my DIY,
the WM8740 does not work somtimes! The chip will work only if I power down and up the board one or more times. then, I can get the output from the chip.
Notes, the CS8416's LED's status is alway good, and I had build two borads, both of them are the same.
Did anybody find the problem?
Thanks
James.shang
Re: Does anybody find the WM8740 hang when power on sometimes?
Did you use my PCB?
I have never seen this happen.
Cheers!
Russ
james.shang said:
Did you use my PCB?
I have never seen this happen.
Cheers!
Russ
Re: Does anybody find the WM8740 hang when power on sometimes?
When it does not work, what is the state of the reset pin (pin 22 RSTB) of the WM8740 ?
james.shang said:
When it does not work, what is the state of the reset pin (pin 22 RSTB) of the WM8740 ?
The Opus I embedded in my CD player is actually powered all the time (that the unit is plugged in). It has never given me problems.
Hi! Russ, Rfbrw and Brian
I chose Russ's Schematic but build the PCB by myself. The CS8416's RESET(pin 9) and WM8740's RESET(pin 22) are connected together to my Reset circuit which is two NOT gates buffer.
The SPDIF input is a CDROM. I power on my DIY, only the Yellow LED(cs8416 PIN16 / 96kh is High) turn on. When I press the play button, only the Red LED turn on (CS8416's PIN14 / ERROR is LOW). And here is the problem, I can get the music from the WM8740's output sometimes or get Nothing with the White LED turn on soon. So, I must turn off and on my DIY more times.
It seams that WM8740 does not synchronize with the cs8416, I am curious why the RED (ERROR ) LED is on ?
Is't my Rest circuit fault? or WM8740's bug? or CDROM does not match the cs8416 ?
Thank you very much!
James.Shang
Here is my schematic pdf file, please take a look!
I chose Russ's Schematic but build the PCB by myself. The CS8416's RESET(pin 9) and WM8740's RESET(pin 22) are connected together to my Reset circuit which is two NOT gates buffer.
The SPDIF input is a CDROM. I power on my DIY, only the Yellow LED(cs8416 PIN16 / 96kh is High) turn on. When I press the play button, only the Red LED turn on (CS8416's PIN14 / ERROR is LOW). And here is the problem, I can get the music from the WM8740's output sometimes or get Nothing with the White LED turn on soon. So, I must turn off and on my DIY more times.
It seams that WM8740 does not synchronize with the cs8416, I am curious why the RED (ERROR ) LED is on ?
Is't my Rest circuit fault? or WM8740's bug? or CDROM does not match the cs8416 ?
Thank you very much!
James.Shang
Here is my schematic pdf file, please take a look!
Ok, I see some notable changes in your schematic.
Your reset scheme is a bit different.
What are the states(measured) of the reset and mute pin of the WM8740 and the receiver when you are not getting music.
Still looking at your circuit...
Your reset scheme is a bit different.
What are the states(measured) of the reset and mute pin of the WM8740 and the receiver when you are not getting music.
Still looking at your circuit...
boards went together pretty well, though I'm getting to really hate the process... 😉
Just waiting on some other parts (trafo, case, etc.)
I assume U4 is not needed (since mine came without)?
Just waiting on some other parts (trafo, case, etc.)
I assume U4 is not needed (since mine came without)?
Hi, Russ
My problem had been resolved by replacing the Reset Capacitor to 0.1u. In my schematic the LED error should be named as LED spdif signal Good.
I also connected the CS8486's OMCK to a 12.228M oscillator output, it works, but I think it is not necessary, Do you have some idea about it?
Regards & Thanks
James.shang
You design is simple and great!
My problem had been resolved by replacing the Reset Capacitor to 0.1u. In my schematic the LED error should be named as LED spdif signal Good.
I also connected the CS8486's OMCK to a 12.228M oscillator output, it works, but I think it is not necessary, Do you have some idea about it?
Regards & Thanks
James.shang
You design is simple and great!
james.shang said:
Thanks! 🙂
That is great news. 🙂
As for the OMCK I did not use it, and have not tried it. I am glad it seems to work well.
Cheers!
Russ
EvilYoda said:
Well I can report that Opus is very much alive and well, but my very provident real job has just introduced a major acquisition which means serious integration for me. 🙂 So I am working 70-80 hour weeks, indeed even today I have been working.
The good news is, that I should be back on this very soon. 🙂
Daggum priorities.... 🙂
Cheers!
Russ
hehe...understandable. And with the news of an upcoming baby for Brian, chaos seems rather typical for you guys. Can't wait for the final Opus, but I guess I'll have to 🙂
I must say this DAC looks excellent. Every thing about it looks like you made the right choices, there is very little I would want to do differently if I was designing it myself 😉
I've just started following this thread. Looking forward to the DAC being finished. Just wondering are there are any others like it? Just to compare with this one. Most others are NOS. Other DACs are trying to be high performance with PCM1792 - too expensive!
Seems this is the first one I've found that is what I'm looking for. A good midrange DAC that is not NOS. Is this really the first one?
I've just started following this thread. Looking forward to the DAC being finished. Just wondering are there are any others like it? Just to compare with this one. Most others are NOS. Other DACs are trying to be high performance with PCM1792 - too expensive!
Seems this is the first one I've found that is what I'm looking for. A good midrange DAC that is not NOS. Is this really the first one?
Hi Russ,
Have you some progress report about the new Opus release ?
I'm close to be in for a balanced one.
Could you confirm that dual mono won't really increase resulting sound quality ?
Have you planned the USB connector, and BTW will it be aivailable with the RTM version ?
Nice to read you.
Hope Brian's baby is growing fine.
Have you some progress report about the new Opus release ?
I'm close to be in for a balanced one.
Could you confirm that dual mono won't really increase resulting sound quality ?
Have you planned the USB connector, and BTW will it be aivailable with the RTM version ?
Nice to read you.
Hope Brian's baby is growing fine.
The gerbers have been submitted to the board manufacturer for review and (if all checks out) production. We are currently estimating a June 18th ship date for boards and kits.
The initial offering will be the DAC board and the S/PDIF receiver board. The USB receiver will come next.
I will be finalizing the BOM this week and posting pricing etc on the site for pre-orders.
Sorry this project has dragged on so long. Should be worth the wait though.
The initial offering will be the DAC board and the S/PDIF receiver board. The USB receiver will come next.
I will be finalizing the BOM this week and posting pricing etc on the site for pre-orders.
Sorry this project has dragged on so long. Should be worth the wait though.
Thanks! She's doing great, and proving very proficient at keeping us up all night 😉
She's doing great, and proving very proficient at keeping us up all night
Brian she wants to hear talking Heads "stay up late"
Russ I was looking at the Woldson specs and there is a attenuator built into it , have you played with it at all? I would like to build a Twisted X Pre with a Opus, it would be cool not to have to use a analog attenuator.
Thanks
Bill
Brian she wants to hear talking Heads "stay up late"
Russ I was looking at the Woldson specs and there is a attenuator built into it , have you played with it at all? I would like to build a Twisted X Pre with a Opus, it would be cool not to have to use a analog attenuator.
Thanks
Bill