Firmware upgrade for Preamp and DAC.
Okay, finally it is here.
The new firmware has following features:
Following needs to be installed to upgrade firmware. Also an USB-serial interface is need as well.
Atmel SAM-BA In-system Programmer
Okay, finally it is here.
The new firmware has following features:
- Balance control +/-12dB
- Filter setting 0 - 3 for PCM mode DAC.
- Showing Samplerate/mode (No bit depth at the moment)
- Control is a lot easier. Menu button on remote is used for entering Settingsmenu
- In settingsmenu, up/down arrow is used to switch settings. Left/right is to change parameter.
- 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
Sonny, can you give a brief description what the change in sound is using the different filters?
The filter settings number 3 is the one i have put In the firmware In the last 6 month or so.
Compared to filtersetting number 0, number 3 has a bit more air and microdetail. The biggest gamechanger is the output stage that i have made for the dac.
Sent from my iPhone using Tapatalk
Compared to filtersetting number 0, number 3 has a bit more air and microdetail. The biggest gamechanger is the output stage that i have made for the dac.
Sent from my iPhone using Tapatalk
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
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
Hi to everyone, if someone in Italy is interested to buy something from Mirand-audio please contact me because i'm trying to organize a group buy!
If this post is incorrect please delete it and excuse me!!!!
Happy listenings!!!!
If this post is incorrect please delete it and excuse me!!!!
Happy listenings!!!!
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
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
As I said before I'm using Twisted Pear psu's for the moment. The dac psu was still at 5.25VDC so i increased to 5.8 VDC and I seem to notice an improvement in sound quality. Is there an optimum supply voltage?
All internal 5v is regulated Down to 3.3V or less and it is digital only so it is pointless
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
Unless the 5.25v supply does not like hf currents flowing on the digital supply and generates huge spikes
Sent from my iPhone using Tapatalk
Sent from my iPhone using Tapatalk
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
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?
So what's the best analog stage for this AK dac in your opinions.. 😉
can you go capless?
what dicrete opamps would you use?
or other opamps?
what about lundhal transformer output stage?
What im i missing..
can you go capless?
what dicrete opamps would you use?
or other opamps?
what about lundhal transformer output stage?
What im i missing..
Get Sonny's discrete IV - seriously. You can get different (transformers), but you'll not get better. I'm planning on picking up a few in the next month or so and dropping it into other DAC's.
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.
More to come!
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.
More to come!
Do