DCAudioDIY.com

DC Area Audio DIYer's Community
It is currently March 28th, 2024, 2:03 pm

All times are UTC - 5 hours [ DST ]




Post new topic Reply to topic  [ 22 posts ]  Go to page Previous  1, 2, 3  Next
Author Message
PostPosted: September 9th, 2016, 5:30 pm 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
Roscoe Primrose wrote:
BTW, these cables: http://www.ebay.com/itm/232052978506 have the correct connectors for this board & the 4490 board...

Roscoe


The one side will fit the AK4490/4495 DAC board, but the Amanero board has a space between two pins, so a six wide on that side. The U208 USB board has the same pinout as the Amanero I2S Bus connector.


Top
 Profile  
 
PostPosted: September 9th, 2016, 10:07 pm 
Offline
Site Admin
User avatar

Joined: February 28th, 2013, 10:38 am
Posts: 1682
The two USB->I2S capable boards I have just have holes in the PC board, so I'll just be using one end of a cable for those two, and soldering at the other end... Fortunately the holes in both boards are in the same order as the pins on the DAC board end. I think the spacing is correct so I could put a jack on the boards that would take the cable end-to-end, but it's not worth the effort...

Roscoe

_________________
I can explain it to you, but I can’t understand it for you.


Top
 Profile  
 
PostPosted: September 10th, 2016, 10:10 am 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
If you have two left over cables, I will buy them off of you. Not sure if this USB board comes with the pin header or not. Description shows both ways, and getting answers are interesting in Chinese.

I did get the download link for the USB PC driver, so that part should be ok. We shall see.


Last edited by HAL on September 10th, 2016, 1:03 pm, edited 1 time in total.

Top
 Profile  
 
PostPosted: September 10th, 2016, 11:56 am 
Offline
Site Admin
User avatar

Joined: February 28th, 2013, 10:38 am
Posts: 1682
HAL wrote:
If you have two left over cables, I will buy them off of you. Not sure if this USB board comes with the pin header or now. Description shows both ways, and getting answers are interesting in Chinese.

I did get the download link for the USB PC driver, so that part should be ok. We shall see.


I'll probably have extras. Yeah, I noticed that of the four pictures, two showed the header, and two just holes. I'd rather have the holes personally.

Roscoe

_________________
I can explain it to you, but I can’t understand it for you.


Top
 Profile  
 
PostPosted: September 12th, 2016, 9:45 am 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
Well after 11 days and no update on tracking on the U208 XMOS board, the company is now talking to the post office in China to see where it is. It's always something.


Top
 Profile  
 
PostPosted: September 14th, 2016, 9:59 am 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
Something tells me the XU208 Q1 board is lost.

Company said it would check with the post office two days ago and no update.

Not sure if it is coming via Taiwan as they have the Typhoon. They are getting hit hard. If so, this might be gone forever. Ugh!


Top
 Profile  
 
PostPosted: September 15th, 2016, 8:05 am 
Offline

Joined: July 17th, 2016, 6:24 am
Posts: 1099
HAL wrote:
Waiting on the new U208 style XMOS USB to I2S Board board to arrive. Coming from China, so have no idea when it will get here.

The AK4495SEQ board has filter selections, but no description. Think I figured it out 4, but there is a 5th filter not selectable that is new called the superslow rolloff for the S version chip. Have to figure that one out as well.

Probably get it after RMAF, so will work on it then as well.


All five filter are selectable according to this DAC on Ebay.

http://www.ebay.com/itm/131920789780?_t ... EBIDX%3AIT

Attachment:
2016-09-15_8-00-45.jpg
2016-09-15_8-00-45.jpg [ 149.3 KiB | Viewed 21134 times ]

Attachment:
2016-09-15_8-01-13.jpg
2016-09-15_8-01-13.jpg [ 103.7 KiB | Viewed 21134 times ]


Top
 Profile  
 
PostPosted: September 15th, 2016, 8:22 am 
Offline

Joined: July 8th, 2016, 4:34 pm
Posts: 570
If you want more flexibility in filtering and don't want to be limited to what the hardware manufacturer is will to give you look at -

http://rtaylor.sites.tru.ca/2013/06/25/ ... are-howto/

combine the computer processing with a really good DAC you can have any filter you want.

He also has a digital realization of the Linkwitz electronic crossover for the LX521 speakers -

http://rtaylor.sites.tru.ca/2013/03/20/ ... tware-dsp/


Top
 Profile  
 
PostPosted: September 15th, 2016, 8:47 am 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
I already use a Danville Signal Processing dspMusik for the 8 channel digital crossover with minimum phase DAC's for my line arrays.

You can make generic filters with the biquad blocks cascaded or use the Butterworth or Linkwitz-Riley alignments.

The AK4495SEQ has filters that are not linear phase as the reconstruction filter, so wanted to try that for the headphone amp. The AK4490EQ works very well with the slow rolloff filters. Want to try the superslow filters next.


Top
 Profile  
 
PostPosted: October 8th, 2016, 9:07 am 
Offline
User avatar

Joined: January 13th, 2016, 9:14 pm
Posts: 787
Well the first USB board was lost, the second shipped a week ago, but similar problem, no tracking updates.

Just about time to canx this company and try another XMOS U208 board for the DAC.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 22 posts ]  Go to page Previous  1, 2, 3  Next

All times are UTC - 5 hours [ DST ]


Who is online

Users browsing this forum: No registered users and 48 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group