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Old Yesterday, 05:29 AM   #2771
DRONE7 is offline DRONE7  New Zealand
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Join Date: Aug 2008
Quote:
Originally Posted by Markw4 View Post
Suppose I make zip files containing instructions (including lo-res pics), BOM, schematic, hi-res pics, and layout diagram (if available) for the through hole component mods. The file size is going to much, much larger than what I can attach to a diyaudio post. (I can't even post one really hi-res pic.) Where would be a good place to host it so people can get it?
Hi Mark,
Dropbox works, or you could post the Hi-res to a photo hosting site like 'Flickr' or '500pix' or similar with free hosting then link here...and attach here the bom, layout, and schematic ...should fit fine..

cheers...bob
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Old Yesterday, 03:04 PM   #2772
terry22 is offline terry22
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Join Date: May 2017
Quote:
Originally Posted by DRONE7 View Post
If you are not playing DSD files but simply using the AK4137 to upsample PCM to DSD then you shouldn't need a USB board at all.
Simply connect the I2S output from the Kali or Pi.
In fact there is a Pi Hat version of the AK4137 that I think does DSD file input too... (although it does not have the LCD display that the stand alone board has)
Raspi-4137 Raspberry Pi Digital Network Player Supports 32bit 384K DSD256 | eBay

I use both the basic XU8 usb to I2S (which is the previous series to the one you linked) and a DIYinHK XMOS XCORE-200 XU216 which is the series after your linked XU208
XMOS 384kHz DXD DSD256 high-quality USB to I2S/DSD/SPDIF PCB - DIYINHK
I have several different devices and O/S' and some, such as X86 PC's ,don't have I2S out. Thus the need for a usb interface.
I recall that Mark uses Windows PC so needs Usb to I2S too.

Thank you Drone,
Very clear.
As I have many DSD 64/128/256 files(for now played with DOP) I will go for xmos.
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Old Yesterday, 11:21 PM   #2773
Markw4 is online now Markw4  United States
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Join Date: Jul 2016
Location: California
Again, more pictures of the AVCC board coming together. Some of it is getting harder to see especially around the opamp socket where there are more wires now. I soldered on some leads to go the 47uf AVCC caps on the dac board and slipped wt/gn/yel sleeving over them for now. Big red and black wires are for +-15v. Decided to go ahead and use the 10k MF resistors I have in stock even though they are kind of big. It was either that or SMD and I decided to stick with the program. Thus, Vref dividers/filters are soldered in place. The opamp input filter is soldered in place. Getting pretty close to the end of the AVCC board.

Pictures below.

For tomorrow: No pictures of it yet, but right now working on attaching the AVCC board to the dac board. That may be hardest part of this whole thing, but it was all I could think of to use through hole components and put the AVCC board close to where AVCC voltages are needed. More on that later.
Attached Images
File Type: jpg Vref_divider2.jpg (67.5 KB, 36 views)
File Type: jpg AVCCwiredAll.jpg (127.9 KB, 36 views)
File Type: jpg AVCCwiredAll2.jpg (122.6 KB, 36 views)
File Type: jpg AVCCwiredAll3.jpg (109.1 KB, 37 views)
File Type: jpg AVCCwiredAll4.jpg (166.5 KB, 36 views)
File Type: jpg AVCCwiredAll5.jpg (130.1 KB, 15 views)
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