Yes, the Buff clock is 100MHz CCHD-950.
But then reading the newer DualXO double rate manual it seems as FIFO+XO-board with 45.1584/49.1520 MHz crystals in sync mode seems to be the way to go (since then i would cover all the way from 44.1/48 to 352/384). I'll have to read more about this.
So the reason Buff uses 100MHz clock, must be to cover all samplerates in Async mode, for flexibility that is.
But then reading the newer DualXO double rate manual it seems as FIFO+XO-board with 45.1584/49.1520 MHz crystals in sync mode seems to be the way to go (since then i would cover all the way from 44.1/48 to 352/384). I'll have to read more about this.
So the reason Buff uses 100MHz clock, must be to cover all samplerates in Async mode, for flexibility that is.
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Actually the datasheet recommends >192*FS for OSF Normal mode. (NB greater than and NOT equal to/greater than).
So 45/49 is only good up to 192kHz.
This is at least part of the reason why Ian has gone to great effort for the Si570 as a way of providing the faster clock frequencies!
Chris
So 45/49 is only good up to 192kHz.
This is at least part of the reason why Ian has gone to great effort for the Si570 as a way of providing the faster clock frequencies!
Chris
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Actually Ian's Spdif->i2s board has an i2s 'back door' that means you can provide your i2s from amanero through this i2s input on the spdif board and cycle through inputs on that board without any drama of having extra multiplexor boards. Unless you have more than one i2s input? Check the zip file for Ian's spdif manual for instructions.
Chris
This is a common misconception. The OSF and synchronous clocking are two separate issues.
Chris
Then how do you explain that I'm able to play PCM 384Khz FS with my BIII connected synchronous with SDtrans384?
I have an dual clock board made by myself based on CCHD957 45.1584 MHz and 49.152 MHz placed on BIII DAC. The clock selection is made remotely by SDtrans
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Actually Ian's Spdif->i2s board has an i2s 'back door' that means you can provide your i2s from amanero through this i2s input on the spdif board and cycle through inputs on that board without any drama of having extra multiplexor boards. Unless you have more than one i2s input? Check the zip file for Ian's spdif manual for instructions.
Chris
This would be the best way to run it, but the problem for me is that i probably won't have enough room in my case (DAC will be together with my tube-linestage, w. AMB R-2R volume, input selector, PSU's and everything), so ian's SPDIF board will not fit the case, if it was smaller (like if the outputs were removed, and connectors were offboard) then it would work. I'll probably have to go for TP-4:1 MUX together with OTTO-2. If there isn't any other good alternatives out there.
Robert
ES9012/8 OSF is ON unless explicitly set to OFF by the DAC controller, refer to page 17 of the datasheet.
The datasheet clock recommendations are just that, recommendations for optimal performance, just because they work doesn't mean that the DAC chip is going to perform at its best. Ian has commented (see quote below) in his Si570 reviews earlier that there is differences between 44.1kHz at 45.1584MHz vs 90.xxxxMHz. He would not at the time comment which was his preference, just that they were subjectively different.
Cheers,
Chris
I know the pain of DAC case layout when trying to fit all these boards together!!! I believe qusp is moving to a separate enclosure for PSUs. I've had enough hassles myself and I have a v-out dac (ES9023) so no IV stage and less than half the PSUs, though I do have 2 (compact) line buffers and 5 or 6 regulators.
I would really suggest rethinking the layout and enclosure selection to try to fit Ian's spdif board in there though if at all possible, it really is an excellent solution though I have no need for it myself (only one usb input on my dac).
Have a look at AR2's case layout earlier in this thread for ideas, it is really neat and he fully recommends the spdif board of Ian's.
Cheers,
Chris
FIFO with Red Baron DAC
Hello Ian,
after more and more questions from members who build my Red Baron DAC and how to connect your FIFO kit to the I2S input of it, now i had the time to read the whole thread.
1st a big applause and Chapeau to your outstanding project!
My own setup looks like this:
iMac/Pure Music/ALAC files --USB--> modified Teralink X2 --I2S--> 2x Red Baron with TDA1541A S1 double crown in parallel NOS mod. --> Tube-I-zator SRPP output stage
I would like to use your S/PDIF interface board. The I2S backdoor would be connected to the Teradak I2S, witch should be no problem.
If i would like to use all sampling freq. from 44.1kHz up to 96kHz (X2 maximum) or 192 kHz (Wave I/O), i think it would be the best to use your SI570 Clock board with the isolating board.
Because i have Salas LV Shunt´s in my project, i would use two to power the FIFO and the Clock board.
I am not sure, if your I2S-PCM board brings any advantages in my setup.
Did you have any other recommendations for me, or did i forget anything?
Best regards,
Oliver
Hello Ian,
after more and more questions from members who build my Red Baron DAC and how to connect your FIFO kit to the I2S input of it, now i had the time to read the whole thread.
1st a big applause and Chapeau to your outstanding project!
My own setup looks like this:
iMac/Pure Music/ALAC files --USB--> modified Teralink X2 --I2S--> 2x Red Baron with TDA1541A S1 double crown in parallel NOS mod. --> Tube-I-zator SRPP output stage
An externally hosted image should be here but it was not working when we last tested it.
I would like to use your S/PDIF interface board. The I2S backdoor would be connected to the Teradak I2S, witch should be no problem.
If i would like to use all sampling freq. from 44.1kHz up to 96kHz (X2 maximum) or 192 kHz (Wave I/O), i think it would be the best to use your SI570 Clock board with the isolating board.
Because i have Salas LV Shunt´s in my project, i would use two to power the FIFO and the Clock board.
I am not sure, if your I2S-PCM board brings any advantages in my setup.
Did you have any other recommendations for me, or did i forget anything?
Best regards,
Oliver
Oliver,
Did you have a chance to read through Ian's I2S to PCM board thread also? I think it would be worthwhile (and much shorter than this thread). Daughter board thread is here - http://www.diyaudio.com/forums/digi...1541-fifo-universal-i2s-pcm-driver-board.html
Here is a quote from Regal from that thread regarding the TDA1541 DAC that might be applicable to your DAC design:
Chris
Did you have a chance to read through Ian's I2S to PCM board thread also? I think it would be worthwhile (and much shorter than this thread). Daughter board thread is here - http://www.diyaudio.com/forums/digi...1541-fifo-universal-i2s-pcm-driver-board.html
Here is a quote from Regal from that thread regarding the TDA1541 DAC that might be applicable to your DAC design:
Chris
no it isnt, only if you dont give it enough bandwidth, or switch it off.
if you provide with 90.xx/98.xx OSF is still enabled up to 384khz
there is no 'sync mode'
Hi Chris,
thank´s for the advice. I will hold the I2S/PCM board in mind, because i use not the dual differential simultaneous mode
Cheers,
Oliver
Hmm... The DEM-Reclock circuit from -ecdesigns- on my DAC is fed by the BCK. It has a small modification (12K+Schottky diodes).
This results in better synchronization. It also provides best perceived sound quality.
The BCK signal we have also from the FIFO...
Hmm... The DEM-Reclock circuit from -ecdesigns- on my DAC is fed by the BCK. It has a small modification (12K+Schottky diodes).
This results in better synchronization. It also provides best perceived sound quality.
The BCK signal we have also from the FIFO...
yes, but he also played with oversampled DEM and different rates of freerunning DEM adjusted by capacitor values, easier to play with with software/firmware settings than logic and discrete circuits. it is a new way of thinking, stuff that would normally take quite some prototyping and trial error can be experimented with quickly enough to make real subjective comparisons without relying on audio memory.
this will be what Thorsten does, being a lover of FPGAs
That´s true. I never touched again the DEM-Reclock circuit, because the sound result is awesome. But let´s see what fun the FIFO brings
Need help with new crystek cchd957,
First of all, many thanks to Ian for this great product.. huge improvement to my system, im using a shigaclone for transport and without the fifo, the shigaclone sounds muddy. All i can say is that , the fifo withe generic xo greatly improved my system.
Now i installed the crystek clocks using the adapters, and it doesnt work anymore. output led and lock led on the spdif boards does not light up. If i install back the generic clocks, they work again..
Is there something that i have missed on the instructions?
Will post pics soon..
Thanks guys
First of all, many thanks to Ian for this great product.. huge improvement to my system, im using a shigaclone for transport and without the fifo, the shigaclone sounds muddy. All i can say is that , the fifo withe generic xo greatly improved my system.
Now i installed the crystek clocks using the adapters, and it doesnt work anymore. output led and lock led on the spdif boards does not light up. If i install back the generic clocks, they work again..
Is there something that i have missed on the instructions?
Will post pics soon..
Thanks guys