have you used adum4160 on the CM6631 interface?
I read somewhere that used on some other interfaces, this adum chip made the USB-I2S board unrecognisable by the windows drivers and after taking it out, everything switched back to normal
Adum4160 doesn't work for cm6631 - I tried - no device detected. It works with Tenor 7022L, UDA1321, pcm270X etc but not this.
And to you !
I had a few moments before Boxing day kicks off to do this - added some 100R smd resistors to the I2S lines. It's a hack, so it looks ugly but the connections are 100%. I can add the adum3440 after the resistors.
An externally hosted image should be here but it was not working when we last tested it.
To do a good job you should mount the clock on the clean side, after the isolator (near the DAC) and send it back to the USB-I2S chip through (another) isolator. I2S lines should be reclocked after the isolator, too.
Of course you need two separated power supplies and the ground on the two sides must be isolated, too.
Of course you need two separated power supplies and the ground on the two sides must be isolated, too.
Hi,
The DACs I will use this with either have their own clock (AMB y2) or will run off the MCLK, so there's no need for the extra return.
After the adum3440, I was thinking about using a 74VHC157 to provide an I2S switch for a second I2S feed. Should do the job ?
Cheers
The DACs I will use this with either have their own clock (AMB y2) or will run off the MCLK, so there's no need for the extra return.
After the adum3440, I was thinking about using a 74VHC157 to provide an I2S switch for a second I2S feed. Should do the job ?
Cheers
Frankensolder
😱
On the third attempt, finally, I got reliable strong solder joints. What a dog's dinner. Those smd resistors did not want to co-operate, and I went through 8 of them, but I was determined to use them for the better performance, and finally, it was done and with 100% good connections. The cable is cat6 single core. the grey putty makes sure the joins don't get stressed. I plan to use a filter+3.3V reg for the input side but for initial tests, power is direct from the usb. Unfortunately, I've run out of time so it'll have to wait until the new year to test.
Unix - I have realised you mean desoldering the clocks on the USB side and thus allowing them to be isolated. But there are three xo's, and the usb pcb locates them very close to the CM6631, so I'm certain that relocating them for cleaner power would result in longer lines and more, not less, jitter. So instead I have used a cap multiplier to clean up the usb power to this board, along with an ultra low esr Nichicon PL cap, described in post 46
😱
On the third attempt, finally, I got reliable strong solder joints. What a dog's dinner. Those smd resistors did not want to co-operate, and I went through 8 of them, but I was determined to use them for the better performance, and finally, it was done and with 100% good connections. The cable is cat6 single core. the grey putty makes sure the joins don't get stressed. I plan to use a filter+3.3V reg for the input side but for initial tests, power is direct from the usb. Unfortunately, I've run out of time so it'll have to wait until the new year to test.
An externally hosted image should be here but it was not working when we last tested it.
Unix - I have realised you mean desoldering the clocks on the USB side and thus allowing them to be isolated. But there are three xo's, and the usb pcb locates them very close to the CM6631, so I'm certain that relocating them for cleaner power would result in longer lines and more, not less, jitter. So instead I have used a cap multiplier to clean up the usb power to this board, along with an ultra low esr Nichicon PL cap, described in post 46
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Your hack gives a new meaning to "isolator" 🙂
The adum3440 arrived today. I don't have a wide body adapter pcb, so I cut a regular sop16 in half, soldered on the adum, and then used epoxy putty to make a very strong bridge. I'll try fitting it after the holidays, to see if it makes a difference.
An externally hosted image should be here but it was not working when we last tested it.
Merry Christmas !
🙂
I wonder what the electrical properties of epoxy putty are..... it could be a great material for "custom" electronics....? ;-)
I wonder what the electrical properties of epoxy putty are..... it could be a great material for "custom" electronics....? ;-)
Hi all,
Merry Christmas (late) and happy New Year!
I have one of diyinhk usb to I2s converters but have not been able to make it sing,In foobar it says it's loaded at least down in the left bottom corner and it says the cm audio device is found,drivers from site,winxp pro,but no output so I took it loose and connected a scope, should I be able to read these outputs with out a dac connected to it and does it seem to have the drivers loaded correctly,I am about ready to load linux ubuntu newest and try to see if it will find and load it,and of course play it!
Thanks ,
No Smoking,lol a play on burning up perfectly good parts,lol
Merry Christmas (late) and happy New Year!
I have one of diyinhk usb to I2s converters but have not been able to make it sing,In foobar it says it's loaded at least down in the left bottom corner and it says the cm audio device is found,drivers from site,winxp pro,but no output so I took it loose and connected a scope, should I be able to read these outputs with out a dac connected to it and does it seem to have the drivers loaded correctly,I am about ready to load linux ubuntu newest and try to see if it will find and load it,and of course play it!
Thanks ,
No Smoking,lol a play on burning up perfectly good parts,lol
Hi KlipschKid,
I got it to work had 3 problems all nipping at my toes,lol.
A bad switch ,headphone cord(don't loan headphones to your kids),
and wrong drivers,
To make a short story out of this,IF you have one of these boards ,load the setup file form the site first and it will tell you when to connect the board,I never could get windows to find the correct driver manually,lol.but it is working now,sounds good in hardware,now the fun part software,,,,lol.
Thanks to all that post,it helped!
NS
I got it to work had 3 problems all nipping at my toes,lol.
A bad switch ,headphone cord(don't loan headphones to your kids),
and wrong drivers,
To make a short story out of this,IF you have one of these boards ,load the setup file form the site first and it will tell you when to connect the board,I never could get windows to find the correct driver manually,lol.but it is working now,sounds good in hardware,now the fun part software,,,,lol.
Thanks to all that post,it helped!
NS
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Hi,
You'll need to find the pin for spdif in, feed it ttl level spdif, and get a driver and firmware to control it (Asus' should work). Here are the pins.
Can you find it ? 😕
If not, quit now. 🙄
It's pin 40. 😎
It can be done as this photo from Asus' Website for the Essence One shows inputs, but I wouldn't attempt it because those pins are too small for me to work with. How about you ? Do you know a device with an easy pin out connector ? Is there one on the market ? Have a look on Ebay and Taobao.
ASUS - Multimedia- ASUS Xonar Essence One
You'll need to find the pin for spdif in, feed it ttl level spdif, and get a driver and firmware to control it (Asus' should work). Here are the pins.
An externally hosted image should be here but it was not working when we last tested it.
Can you find it ? 😕
If not, quit now. 🙄
It's pin 40. 😎
It can be done as this photo from Asus' Website for the Essence One shows inputs, but I wouldn't attempt it because those pins are too small for me to work with. How about you ? Do you know a device with an easy pin out connector ? Is there one on the market ? Have a look on Ebay and Taobao.
An externally hosted image should be here but it was not working when we last tested it.
ASUS - Multimedia- ASUS Xonar Essence One
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I don't want to use spdif input.
Pins 30, 31, 32, 33 main I2S for recording, and it is my target.
Pins 30, 31, 32, 33 main I2S for recording, and it is my target.
I don't think Asus use those pins so you're probably not going to succeed ; unless you can find firmware / driver to control those pins.
ASUS O!Play Essence One PCB | Flickr - Photo Sharing!
ASUS O!Play Essence One PCB | Flickr - Photo Sharing!
Probably original C-Media firmware tool generator can anable all features of CM6631 but I don't have 🙁
If anyone wants to isolate the output of their CM6631, there is a group buy started on this thread :
http://www.diyaudio.com/forums/group-buys/227502-amanero-isolator-reclocker-gb.html
and a little more here:
http://www.diyaudio.com/forums/digital-line-level/147817-ackodac-based-es9018-64.html#post3301635
roygbiv - email C-Media - tell them you want to develop this aspect of their IC. They might send you the tool if you sign an NDA. If not, then the spdif should work.
http://www.diyaudio.com/forums/group-buys/227502-amanero-isolator-reclocker-gb.html
and a little more here:
http://www.diyaudio.com/forums/digital-line-level/147817-ackodac-based-es9018-64.html#post3301635
roygbiv - email C-Media - tell them you want to develop this aspect of their IC. They might send you the tool if you sign an NDA. If not, then the spdif should work.