Main Volume Control to an old Amp from App, IR and Amplifier Poti

[maettu49]

Hello everyone

Yes, maybe I’m an old lazy bastard . but I still want to use the convenience of streaming services with my Technics SE-A900SM2 stereo system.
I would like to be able to adjust the volume via IR remote , volume control on the amplifier and via the streamer app .
It is important to me that the volume control on the amplifier can be changed via the app and that the output signal on the streamer remains fixed.

So far, I haven’t found any streamers that allow this. If the output signal is fixed, it is always blocked in the app. And therefore it is not possible to use this signal on the API to adjust the volume on the amplifier.

Now I’m hoping that this is possible with an Arylic Up2Stream Pro. Unfortunately, I can’t find all the information I need in the documentation.
That’s why I’m trying again here with a new post. my question in the

Latest API documents and UART protocols

Hello everyone I would like to upgrade my stereo system with a streamer. So far, I have been streaming my music with my laptop or smartphone. The problem is that I can’t adjust the volume via the amplifier. My idea is to have a fixed volume setting on the streamer and still be able to adjust it via the app (Spotify or 4STREAM). A test with the Spotyfi API has shown that the volume cannot be adjusted on many devices if the output is fixed. If this is possible with Arylic products, I could al…

was probably overlooked.

My questions:
Can the output volume be fixed on a DAC board extention and still be changed via the UART interface to use this information to stear the poti with a arduino?
Does anyone have experience with the UART interface to an Arduino?

Your help is appreciated, thanks in advance!

Matt