[Angertobi]

Hy everyone

Interested to buy a zishan ak4497eq.

Does this player remember the time position of a track, after off and on or shuttting down cause battery is to low?

Very important for long dj sets.

Thankks for help and answer

 

[kookaudio]

Hy everyone

Interested to buy a zishan ak4497eq.

Does this player remember the time position of a track, after off and on or shuttting down cause battery is to low?

Very important for long dj sets.

Thankks for help and answer

No, it does not remember the position on the track.

 

[Angertobi]

No, it does not remember the position on the track.

Thank you for the quick answer.

So without this festure , i can‘t buy it

 

[DBaldock9]

Here’s a nice little introduction to the STM32 board. It’s pretty versatile.

How would you connect the DAC to it though?

Also it has an HDMI output so I’m guessing you have the option of an line out DSD stream via HDMI???

From my post above:
"- would hold this STM32F469I-DISCO discovery board, which has a 4" (800x480) Color LCD Touch Screen, and I2S bus (streams data to the AK4497) -"

Back on 09-JAN-19, @Ivan TT reported that the signaling between the Digital board and the DAC board (across the 10-pin header) is I2S - https://www.head-fi.org/threads/the-zishan-dsds-corner.826185/page-99#post-14708362
Back on 11-JAN-19, I mentioned that this ARM Cortex-M4 development board has an I2S header (CN12, Pins 10, 12, 14) - https://www.head-fi.org/threads/the-zishan-dsds-corner.826185/page-100#post-14713056

There is the slight complication that @Ivan TT also mentioned the DAC is initialized using control registers, so there will be some additional connections (and programming needed) to initialize the DAC - before the STM32 board can send audio data via I2S.

 

[DBaldock9]

Here’s a nice little introduction to the STM32 board. It’s pretty versatile.

How would you connect the DAC to it though?

Also it has an HDMI output so I’m guessing you have the option of an line out DSD stream via HDMI???

That's the larger F769 board, which has an ARM Cortex-7 processor, and costs $87.50.

Here's a demo of the F469 board (with ARM Cortex-4) that I linked to above -
.

 

[DBaldock9]

Just got the new AK4493 version of Z3 from the famous Taobao of China , which costs about $4 more than the original AK4490 Z3. My old Z3's PO had been broken with single channel sound out after a year use. Been trying Hiby R3 & M0, I think Z3 is still the best valued mini DAP, so I want to give it a second chance.

Their built-up are almost the same with different DAC use ( I made myself a hi-res Z3 / 4490 with a sticker ). Instead of AK4493, they printed "AK449x" at the back, in case they can change different DAC in future

About the sound, I think the AK4493 Z3 has more refined sound, more details on background music, with a little bit uplifting in high. It's not a huge upgrade from the original version. So, I suggest to keep the original Z3, and no need to rush for the new version. Anyway, I feel satisfied with the AK4493 Z3, and its worth to pay the extra.

I liked my Zishan Z3, but it kept resetting itself when I unplugged the USB cable, after using it as a USB DAC for my PC at work.
It reset, whether it was powered off, or on, when the cable was disconnected.
So, I ordered the DSD, and it works great as a USB DAC for my work PC (without having to install any drivers) - and it keeps its configuration settings when the USB is unplugged.

 

[buzzbuzz]

Anyone here follow the development of YinLuMei D200? Is it dead? Two years ago, I tried to register Taobao to buy one, but gave up on it.
Is Zishan Z3 basically the old D200?

 

[HeyManslowdown97]

That's the larger F769 board, which has an ARM Cortex-7 processor, and costs $87.50.

Here's a demo of the F469 board (with ARM Cortex-4) that I linked to above -
.

Yea you gotta get it in order to sort it out! I just googled things like Stem32 DAC circuit and Stem32 Dac Audio and there are a plethora of information on how to re-configure and program the board to the DAC.

The Cortez Arms seems to be the best option. I also notice that they have other option like multi channels.

The big payoff: If someone figures out the configuration there are literally a infinite amount of ways to optimize to the DAC. Also, this would apply for future DAC by ZISHAN for akm Chips.

Not sure what makes the Zishan great sound despite the ak4497 chip but it’s quite the achievement that in China someone would be to make something on the cheap with fake components sound great out of the box. The programming is another story! I would imagine it’s because of the language barrier.

 

[HeyManslowdown97]

Anyone here follow the development of YinLuMei D200? Is it dead? Two years ago, I tried to register Taobao to buy one, but gave up on it.
Is Zishan Z3 basically the old D200?

I believe that one was of limited supply. You are lucky if you have one!

FYI: how the f do you use Taobao even when I translate it I’m still not getting how to order!!! It sucks cause they have cool stuff that AliExpress doesn’t. Also, the Alibaba shows stuff in the search engine but difficult to “click” on to (at least here in the states)

 

[buzzbuzz]

I believe that one was of limited supply. You are lucky if you have one!

FYI: how the f do you use Taobao even when I translate it I’m still not getting how to order!!! It sucks cause they have cool stuff that AliExpress doesn’t. Also, the Alibaba shows stuff in the search engine but difficult to “click” on to (at least here in the states)

Two years ago I could not handle the Taobao website, that was the reason I gave up. I understand there are "buying agent" websites available operating in English today. Superbuy.com is one of them. Need more research on these sites before I buy.

 

[Ivan TT]

I used cssbuy for over a year, cheap and reliable, recommended!

 

[HeyManslowdown97]

I used cssbuy for over a year, cheap and reliable, recommended!

You can scheme the DAC! If I had the skills to do it I would and also write a components list to make it compatible with a Cortez ARM Stem32!

It looks easy and cheap to get made!

 

[buzzbuzz]

It looks like YinLuMei first attempt to make an Andriod based, double AK4497 DSD called A1 had failed. They are offering 3000 yuen credit ( pay addition 1,500 yuens) toward a replacement called A1S. I would love to see the schematic of A1S.

Also D300 is replacing the old D200/D200+. D300 has AK4497 and true balanced 3.5 output. $300-$360 usd + shipping at Taobao. This is a bit out of my price range. Is it better than Zishan DSD?

 

[DBaldock9]

Was able to locate 3x Burson V6 Classic - Dual Discrete Op-amps for sale, at $54.62 ea (including shipping), advertised on US Audio Mart, from an individual in Mississauga, Ontario, Canada.
They should be here sometime next week.

 

[Merlin-PT]

For the music type I'm listening, acoustic with voices, I liked opa2209 or AD8066 soldered in LPF, I still haven't decide between them, I like both.
Voices sound good and music has good detail, transparency and separation, to me they sound better than the others that I tried in LPF: 275, 1688, 1652, 4562.

I also tried increasing the opamps voltage from +-9V to +-12V, I didn't notice any improvement in sound and with AD8066 their temperature gets hotter, so with them I prefer to use +-9V.

I've received opa1622, but I have other opamps that sound better in the socket.
It's mounted in a dip8 socket with some resistors and capacitor. I think Ivan reconfigured it and is not using it like this.

@Ivan TT
Do you think I should use opa1622 instead of the discrete transistors?
I don't mind keeping the output capacitors, if it makes the modification simpler.
How should I configure opa1622 to replace the transistors?
The dip8 PCB has 3x 10K smd resistors and 2x unknow capacitors.