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AK4490 USB Dac with dsd support.

Firmware upgrade for Preamp and DAC.

Okay, finally it is here.

The new firmware has following features:

  1. Balance control +/-12dB
  2. Filter setting 0 - 3 for PCM mode DAC.
  3. Showing Samplerate/mode (No bit depth at the moment)
  4. Control is a lot easier. Menu button on remote is used for entering Settingsmenu
  5. In settingsmenu, up/down arrow is used to switch settings. Left/right is to change parameter.
  6. New filter setting is marked with an '*' to show that it is not updated yet. Update is done when samplerate of material is changed.

Following needs to be installed to upgrade firmware. Also an USB-serial interface is need as well.

Atmel SAM-BA In-system Programmer
 
Firmware upgrade for Preamp and DAC - Description and files

See the attachments.
Frontpanel can be upgraded without the DAC to be upgraded but the DAC cannot be upgraded unless the Frontpanel is upgraded.

BR

Sonny
 

Attachments

Hi Sonny,

When using a combination of both DAC and preamplifier with display, do we upgrade the DAC first using ak4490 USB DSD DAC Shortdelay slow roll off 271215 display.zip and then move on with the Mirand Frontpanel 271215.zip

OR

The Mirand Frontpanel 271215.zip will update both?

This is the only part where I'm not clear.

Thanks!
Do
 
Hi Sonny,

Just so I'm 100% clear and everyone else as well,

Here's what I get

1 : Update firmware of display using
Mirand Frontpanel 271215.zip and procedure in the manual
Display has to be powered for this?
DAC has to be connected to display board using ribbon?

2 : Update firmware of DAC once display has been updated using
ak4490 USB DSD DAC Shortdelay slow roll off 271215 display.zip
DAC is powered and display as well?
Ribbon connected between DAC and display while updating?

Thanks!
Do
 
Hi Sonny,

Just so I'm 100% clear and everyone else as well,

Here's what I get

1 : Update firmware of display using
Mirand Frontpanel 271215.zip and procedure in the manual
Display has to be powered for this?
DAC has to be connected to display board using ribbon?

2 : Update firmware of DAC once display has been updated using
ak4490 USB DSD DAC Shortdelay slow roll off 271215 display.zip
DAC is powered and display as well?
Ribbon connected between DAC and display while updating?

Thanks!
Do

Step 1:
Display has to be powered. Dac does not have to be connected for this.
Before starting the SAM-BA bootloader, Press and hold Switch S4 (Lower right corner of the display) and shortly press reset on the backside.

Step 2:
Both display and Dac need to be powered. Ribbon cable between display and DAC Frontpanel connector need to be inserted after the update.
 
Bavmike, in post 571 you mention Linux is necessary for dsd 256. I read from the theyscon site that dsd over asio is supported on the windows driver up to 512. Was there an older driver version back then?

Yes Linux required. the Theyscon does do native DSD 256 over Asio. But you must licence this driver to do so. This DAC comes with the Xmos driver, not the Theyscon.
 
ok, just updated the preamplifier firmware and DAC firmware and it is quite easy to do.

I have not yet tested with sound but it seems to be working properly. It reads the sampling rate of both PCM and DSD properly. I reprogrammed the inputs and labels and will be testing shortly.

2015-12-29%25252021.32.24.jpg


More to come!

Do