That's terrible news!

I'd like to hear from RME whether or not a firmware update could solve this?

The ADI-2 Pro is completely silent on power-up and power-down. I can only imagine that FIXXXER is not using the Standby-button to turn the unit on/off.

Changing sample rate from a 3xx or 7xx range to 44/48 kHz sometimes causes a click on one channel. This phenomenon is known and still investigated (not easy as it does not happen all the time). It can happen with USB plugging too, as the sample rate is changed to 768 kHz for a brief moment when connecting the ADI-2 Pro to a Mac. Etc.

Changing the filter to NOS causes a (harmless) click directly in the DAC chip when music is played back at the same time. This can not be fixed and is no real problem (and how often do you change the filter?).

The click on Auto Level is harmless as well and can not be fixed, as this level change is nothing different than the user manually changing the Ref Level. This involves relays changing gain, which can not be click-free. The change itself is click-free (try it without audio), but an instant level change on audio always generates a sharp edge, which at the wrong position resembles a click sound. Adding soft level changes/mutes to avoid this click would have ruined the tech specs of the whole AD section.

Now this is embarrasing...I just checked again and first heard (as expected) no noise at all. Then I realized I had the Phones plugged in and the rear output was muted. So I removed Phones and got shock...

It turned out that a line output relais, which connects the electronics with the rear outputs, is turned on a few hundred milliseconds too early. This was adressed and fixed in an earlier firmware, but it seems the change got lost at some point.

We will release a hotfix, most probably next week, that restores this functionality.

woop woop!

Confirmation that even if the click occurs with the volume up, that the signal doesn't contain very low frequencies that could damage a headphone's driver?

Also, I'm curious to know whether the headphone amp is powerful enough to power passive monitor like the auratone 5c?

Lastly, how come an optional soft clip of the A/D stages was not included, that would've been icing on the cake for me atleast.

Ah the click is 40dB below, much different than what my iD22 does which sounds like a full scale dirac spike haha. 

The 5c is 8ohms, what specs should I look into in order to determine whether the headphone amp has enough power?

In regards to the soft clipping, don't get me wrong, I'm happy with the design decision. I wouldn't want to compromise the high quality tracking and monitoring for something that can easily be achieved with other tools. As of now I can actually hear the noise floor on my current HP amp, so I welcome the change.

Thank you for the support!

I saw the video and heard the noise while looking at my photo. Am I now officially allowed to state that I bumped your workplace?

Hi,

My computer went to sleep and when waking up, there was a loud pop coming from ADI-2 Pro.  Anyone else experience this?

thx.

Normal!
MC wrote:
...
    Changing the filter to NOS causes a (harmless) click directly in the DAC chip when music is played back at the same time. This can not be fixed and is no real problem (and how often do you change the filter?).
...

Michal

haha, well...:D

I'm getting a pretty loud smack from the right channel of my ADI-2 Pro when the computer resumes. I assume it's fixable since left channel behaves normal.

Another thought.

Feature: Dim / Mute.

Feature: Auto switch off / power save mode for the ADI-2 Pro

Just speculating some options for the dim/mute function:
Make use of push and hold for more functions. It's unused right now.

I'd rather have dim / mute than bass / treble and quickly changing views which I seldom do. Any serious EQ is done with the parametric one, save up to 20 presets, and you have loudness to follow this custom curves on low levels too.
Push hold B & T to cycle through the different display views if needed.

I think dim / mute is and important quick access. Different views could easily be changed by press and hold and instead of instant change, which could then be something like:
Push "B" to mute selected output (fast fade to silence)
Push "T" to dim selected output (slow fade to selected dim-level)

Just my 0.063 cents

Adjustable brightness is not possible as the LEDs are fixed wired.

That is indeed a good idea.

You are too late with this proposal, someone else in this forum suggested that already

Even worse - we are already working on implementing it.

Haha allright well then my vote goes straight to RME instead