a first look at.
Since there is no case yet, I tinkered a paper case to put the mainboard in and the display at the side.
Mounting the RPI 4 is very easy and the drilling holes are exactly at the right place to mount it to the main board.
Power on gives a red glowing on/off button at the front.
Push it and the AUDIOPHONICS logo appears on the display (nice!), filter setting is displayed for a while and the volume setting in %.
Finally you see: unlock.
Now RPI must know what DAC is used.
In Moode: (Moodeaudio.org)
Go to M (menu, upper right)
Configure - audio - I2S audio device
A bunch of AUDIOPHONICS dacs appear:
I selected 2 of them where ES9038 is listed, both work!
Then you can edit the chip/device options: choose 7 oversampling filters, ofcourse all works!
But listening tests will determine which suits you best.
Starting playback in the browser window on my phone.
Immediately the frequency in KHz. is displayed, and the music is playing.
All sound well on my headphone.
I shut the power down.
At the RCA connectors I plugged in 2 monoblock amplifiers, which are under my floorstanding speakers.
For safety I did not power them on.
Again I pushed the red glowing button on the front.
Exactly the same happened at above.
Then I see: 100%. That is the volume setting! So I put the volume knob down to 10% and powered the monoblocks.
All sound well and the remote control works fine for the volume.
Additional knobs are for RPI commands like play/stop and next/previous.
I have to get lirc (Linux Infrared Remote Control) on the RPI, so it communicates directly with the infrared led at the front!
The first impression of the sound is that the speakers seem to disappear and the sound is very broad, even outside left and right.
Connecting my TV to optical toslink shows that the latency is very low, and that is Top Class!
So far, so good. Today the case is visible on the website, its a beauty! I have it on my wishlist already.