Digital files are meant for a certain size space, in general this space does not allow for unclipped signal above 0 db. All avr processors are not equal and some will provide good floating point processing to exceed the signal. Most of us will agree that going beyond 0 db is entering into clipping, a form of distortion. This is not all bad.
Music people like analog clipping with our tube amps. This is softer clipping. This give a certain warm sound and is pleasant to the ears. Digital clipping is harsher and more like hitting a brick wall. Gain structure comes into play as well as input signal limits, voltage and current delivery. Many of our systems have a mixture of pro and home cinema gear. When we see the clip light blinking it means a portion of the signal is above 0 db. This is not necessarily bad but, sets a proceed with caution warning. If we ignore the caution, some piece of gear in the chain may be damaged.
It is extremely hard for me to know the absolute danger point in this complex mixture of gear and the recording of the movie files. Some safety is built into many of the avr's and even mines can support a level of +12 over reference on some movies. On other movies, I will damage something.
The goal early in the ULF thread was to produce a clean spl and not max spl which involves clipped signals. This is why there is a theoretical side of the ULF scorecard Vs the actual measured data. At le last this is my understanding and I seldom go past 0 db. The movies are only design to be so loud and anything beyond is getting into clipping and added distortion.
Last edited by derrickdj1; 07-15-2017 at 11:44 AM.