Topic: ADI-2 FS static noise/crackling noise
I have the RME ADI-2 FS. It is mainly used in connection with a streamer (optical input), but occasionally is also connected to a CD transport (coaxial) and a Macbook (USB). Some months ago it started generating a crackling/static-like noise when the volume level was over +4dBr. During the last months this noise is progressively going lower and lower and now it appears at -3.0dBr. It is not constant and there is no rule when it will be produced. It is produced in all three inputs, although at the optical input it appears in lower volumes. The static/crackling noise is generated at peaks of the music, regardless of high, mid or low frequencies. When the volume is decreased by approximately 1-2 dBr it disappears.
Through trial and error I have excluded the problem being connected with the interconnects, the amplifier, the speaker cables, the specific wall socket. The wiring in the house is in excellent condition and relatively new (10 years) and I have no other issue with other audio/video appliances. The firmware has been updated to the latest version (currently 35).
Note: The issue I have seems to be different from the issue of the thread https://forum.rme-audio.de/viewtopic.php?id=31463 which has similar title