I am not sure if you are familiar with this SD player, called SDTrans384, from japan, this is my main I2S music source. I actually got it powered by one of those DIYINK power supply with the 5v/3.3v, just like you said, that is why I mentioned it, just not sure if they are good enough for the DAC. Anyways, so if I understand you correctly, its the regulator on top of the ESS9038 chip, right? if so, I noticed that russ spec them at 3.6v not 3.3v.

When you say, analog stage, do you mean the I/V stage? I did not mentioned it, but I am not using TP's I/V's stage, I build my own tube I/V stage, it is physically big, but incredible sound.



So the one feeding the XO is just one 3.3v, from DIYINK, is that right?

Did you say you have separate DIYINK supply to the left and to the right? Both supply feeding the AVCC that goes into the DAC? dont think I follow.

"Is there a way to check whether the incoming signal is SPDIF, PCM or DSD?"



Great, excellent. Please let me know when you get done with the implementation of the Sample Rate. I think that
should be it.



I have actually have 3 sources. 1 SPDIF and 2 I2S/DSD. I am using OTTO II to switch between the 2 I2S/DSD.
My I2S/DSD sources are from my SDTrans384 sd player and from Raspberry pi. The best sound so far that I found
is from the SDTrans384. Nobody believes me when I say that a ripped Wav file from a CD into an SD Card and
played through my SDTrans384, sounded better than the actual CD or SACD played through my SONY 5400 player.

I have been looking for a CD/SACD player that has an I2S/DSD output, but could not find one. That would be great.

Thanks again for all your help,
Alex

No idea what dop is. Some other protocol the dac can decode.

By analog power I .mean dac analog power

I've never used the is valid functions so you're on your own :there -)

Happy programming

Will try to find time this evening

PS: You should check your personal mailbox more often :-)

Nice to follow this conversation and to see how it comes to success!

After being distracted from hobby due to lack of time I would like to start over again.

My goal is also a stereo BIIIpro se with one I2s and two (maybe 3) spdif inputs. Inputs should be changed by push button (cycle through) and maybe ir-remote.

Last goal would be a Display (LED-Matrix) to show input NAME and SAMPLING RATE

Will use an Arduino Due and Dimdims shield for isolation reasons.

I fear I will need a lot of help :((

Thank you so much for your code Possum

BR

Branko

btw: as I do not have offer any usable knowledge. I s there a way to spend you some beer (or a wine maybe)

Edited by user Saturday, July 27, 2019 9:29:52 PM(UTC)  | Reason: Not specified

If the board has I2C to connect arduino then YES it is absolutely possible.

You must use an isolator circuit tho as arduino injects too much noise.


I have a smartphone app that lets me control everything remotely

for remote control I use the MQTT protocol, as there are cool apps like MQTT Dash and Home Assistant that make creating a user interface easy.

You will need an MQTT server tho. A Raspberry Pi will do the job. I run it on my Synology NAS.

You can instead use HTTP ReST as the protocol, but MQTT Dash won't work with it. MQTT has the advantage of being able to publish out events as well as receive them - so the DAC can, say, publish out the fact the attenuation changed when you turn the volume knob and the app will magically reflect this. HTTP can't do this. You must instead continually poll the device to detect any changes.

If you want to use MQTT I can share some implementation code with U that you can mod to suit your purposes. It does a lot more than volume control - e.g.: power, filter selection, mute, etc

My library most certainly allows you to set each channels attenuation individually, but be mindful there is a master mode that sets channel 1 as master for all other channel attenuation. My implementation code uses this, but you do not want this enabled if you want individual control of each channel.

Don't forget the isolator - e.g.: https://www.tme.eu/en/de...kroe/i2c-isolator-click/

Twisted Pear is in the process of shutting down, so you might want to ping me your email if you want some assistance, as I don't know how long Brian intends to maintain this support forum for.