[Seegs108]

After my first unit stopped working, I was able to send it back and exchange it for a new one. After doing this trick, I was able to remove the pre-emphasis flag the U16 sends my PS Audio Directstream DAC:

https://forum.psaudio.com/t/getting-oppo-dsd-output-to-the-direct-stream-dac/2744/102

After a few days listening to this DDC (with the HDMI mod I did) I think it sounds wonderful. It's smooth and very natural sounding to me. This is an excellent product for the price. They still need to work out a few software bugs, but I think, as it stands, this is a solid product more people should try.

 

[motberg]

Are you PS Audio folks getting i2s playback OK with all sample rates as Gustard advertised for the U16?

 

[Seegs108]

Are you PS Audio folks getting i2s playback OK with all sample rates as Gustard advertised for the U16?

Yes, as far as I can tell.

 

[FredA]

Yes, as far as I can tell.

Does this mean a new firmware has been issued? Cause it's not available on Shenzen Audio 's download page.

 

[wwmhf]

I checked it last night, the most recent firmware was still V1.61

 

[Seegs108]

Does this mean a new firmware has been issued? Cause it's not available on Shenzen Audio 's download page.

I have 1.61 installed, PSA I2S mode enabled on the U16 and no issues getting sample rates from 44.1 to 192khz, 16 or 24 bit. DSD 64 and 128 work as well. With prior firmwares I used to get odd sounding artifacts (pops and ticks) and now that seems to be gone. I did have to cover pin 15 on my HDMI cable to remove the pre-emphasis flag however. I have a PS Audio Directstream DAC.

 

[FredA]

I have 1.61 installed, PSA I2S mode enabled on the U16 and no issues getting sample rates from 44.1 to 192khz, 16 or 24 bit. DSD 64 and 128 work as well. With prior firmwares I used to get odd sounding artifacts (pops and ticks) and now that seems to be gone. I did have to cover pin 15 on my HDMI cable to remove the pre-emphasis flag however. I have a PS Audio Directstream DAC.

Maybe that pin covering is the key. Gustard is slow to address those issues I find.

 

[wwmhf]

My understanding is that we cannot expect too much from Gustard for updating the software/firmware as quickly as want them to. My impression is that this is a tiny company with a very small engineering team and no software team at all.

 

[jimmychan]

The firmware is done by ESS as this is contracted to them.

 

[peteg]

The firmware is done by ESS as this is contracted to them.

I don't think so, I believe its all Gustard.

 

[FredA]

The firmware is done by ESS as this is contracted to them.

Ess is not responsive to say the least.

 

[wwmhf]

ESS's reply posted here also seems to discourage people to use its chip ..., but why?

 

[Seegs108]

ESS's reply posted here seems to discourage people to use its chip ..., but why?

Which post is this?

 

[JaMo]

Which post is this?

https://www.head-fi.org/threads/gus...terface-featuring-ess-usb-chip.888947/page-31

Pos# 283

 

[wwmhf]

Thanks, but I think you meant Pos# 253