Have fun, and enjoy the lively discussion around this wonderful audio bargain, the ART DI/O. Everyone can add pictures, files, links, or contribute messages....
First off, I don't own a DIO (yet), so I don't know how this tweek would sound.... but in tweeking the earlier CS8412 DIR in an Audio Note DAC, there is MAJOR...
Steve, Thanks for the useful post. I was actually thinking about doing this. One thing to note is that the DI/O uses a CS8427, even though the schematic says...
Hi Gary, I might suggest a look at the Application Note #AN159 on the Crystal site. It includes the CS8427. FWIW, the AN was released after the CS8427 ...
Actually, the stock DI/O parts lock MUCH more easily than the values mentioned in the AN159 app note and CS8427 datasheet. I have tried the recommended values...
...and couldn't delete to add it. Get the RC up there. 47k ohms with 22uF always locks on everything here, though may take up to ~2 seconds. You give up lock...
Since this involves the PLL and the VCO, I think I remember others stating the jitter was also reduced with larger caps that had longer lock times. I saw the...
Hi Bob, I have tried the Crystal recommended values before I had seen the schematics today. An add-on unit like the DI/O IMO needs a little more versatility....
Hi, Just a little bit of confusion going on in my head: I've got an analog stage to hook up to the pin-outs of the DAC chip in the ART (It's LCAudio's Zap...
Hi, you may want to get the crystal dand D/A data sheets to look at the pinouts to figure out what you need. What are you trying to do on the digital side? ......
Hi Bob, I'm just trying to use the upper board as a dac (I'm not interested in any of the analog to digital functions of the AKM chip, with digital in from my ...
OK, so you intend "throw the analog board" out, and run the digital board solo? You'll need to provide power of course, as this comes from the analog board....
I did what you described. i used battery to power it. you can use 2 separate power supplies. you don't need anything connected to the wordclock. i can't...
With the price of the DI/O so cheap these days ($114 + $11 shipping) from Full Compasss, I decided to pick up a 2nd one to experiment with. I thought it would...
nark, after checking my setup, i think j2-3 is the other 5v power supply to the digital. regards king ... solo. ... and - ... ground. ... on ... to ... ...
There's been some suggestion that changing R10 to 75 ohms is beneficial. Jon Risch initial statement that the 100 ohm resistor that is there now was either a...
Mcneice, Robert
robert.mcneice@...
Nov 19, 2001 6:54 pm
18
Bob, My experience is that the 75 ohm resistor is an improvement even with the RCA jacks. However, my experience has always been with a modified DI/O. I had...
Thanks for your reply. I will try the 75 ohm resistor when I change out the op-amp. I've also done some other internal mods - I should have mentioned them in...
Mcneice, Robert
robert.mcneice@...
Nov 19, 2001 8:36 pm
20
Try Mouser for small orders, they are much better than digi-key. Go for the low profile machine pin type of IC sockets. Also, they sell Holco high quality...
Gary - That is an incredible mod undertaking, thanks for writing it up and doing it. I bet with a little tweaking it will really sound good. One more thing...
I am wondering if someone has the part numbers for many of the common mod for the DIO. The output caps, resistors, and I'm sure I've forgotten one or two other...
Ok guys! I've had this thing sitting on my shelf for about a week now. Why? you ask. I'm still trying to figure out exactly what I'm going to do for mods ;)...
Chris
ck42@...
Nov 20, 2001 5:51 pm
24
Bob, Thanks for the positive feedback and the good suggestion about biasing the op amps into class A. This had been on my list of things to do but somehow I...
Could you provide some specific details on HOW you did this? parts, connections, etc? I'd really be interested in making this mod. Chris...
Chris
ck42@...
Nov 20, 2001 7:20 pm
26
Is this the correct socket for the op-amp replacement? If not, can someone provide a #? Mouser part #: 575-11314 Digikey part #: ED56143-ND descrip: MILL-MAX...
Mcneice, Robert
robert.mcneice@...
Nov 20, 2001 7:56 pm
27
Chris, You need to put in a current source for each channel of the output filter. These go from pin 1 to pin 11 of U1 and pin 7 to pin 11 of U1. Current...
That would work or you could try Mouser part # 575-393314 which is even a bit lower profile. Things can get tight in there so every little bit helps. From...
... Yes, I'll add them to the BookMarks area in a few hours. They are the Pass Labs site under the A40 and DIY opamp section, and the Semiconductor course that...
Has anyone actually lowered the output of the DI/O by changing resistors which control the op-amp's output? I already did add the voltage dropping resistor...
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