More > JRiver Media Center 21 for Windows
NEW: Volume Leveling uses the additional Headroom provided by Internal Volume
mwillems:
--- Quote from: lisbethfox on August 13, 2015, 03:13:13 pm ---So if I do 6 db each for the subs I should be in a possible non clip situation? I guess I didnt understand the logic there before but that makes more sense. I have enough gain on the analogue side to easily turn it up so thats no issue, its only about making the initial digital signal as clean and hopefully unclipped as possible.
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You need to do -6dB for both the added channel and the recipient channel to be perfectly safe.
--- Quote ---I would love if you could check on that and tell me but I definitely am not hearing clipping on the lows. For reference my low woofers are comfortable playing 100 dbs with massive excursion so I feel as though I would be hearing distortion or worse seeing it.
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I just checked and the gain on the "add filter" only adjusts the channel you are adding, not the recipient channel. So you need to adjust the receiving channel first with an "adjust the volume" filter as well.
If Clip Protection engages there will be no "actual" clipping and no distortion, just a sudden reduction in volume. It works like a limiter. That's what I'm getting at: with how well clip protection works you could be "clipping" (i.e. overdriving your digital signal) constantly and you'd only notice by the way volume seems to fluctuate occasionally (unless you were looking at the audio path as it happened). It's just dangerous as clip protection is close to perfect, but not perfect (no limiter can be).
--- Quote from: lisbethfox on August 13, 2015, 03:18:20 pm ---Very interesting.
Using the previously described 2 channel preset
Disabling both L to RL and R to RR change an overflowing track (a max of 106% more than it should be at any point) to 84% consistent. The subs are still at -3 with no negative impact. Worried my copying is causing that extra % of gain??
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The copying shouldn't add gain by itself (unless you added gain in the copy filter?)
lisbethfox:
I am adding no gain in the copy filter, nor would there be any information in said channels beforehand. Thats why Im curious as to why when I disable both of those (but not the sub stuff) it stops doing that overload thing.
Sorry if I sound like an idiot, If theres any way I can show you whats happening (better than I've already described) I'll try.
mwillems:
--- Quote from: lisbethfox on August 13, 2015, 10:02:41 pm ---I am adding no gain in the copy filter, nor would there be any information in said channels beforehand. Thats why Im curious as to why when I disable both of those (but not the sub stuff) it stops doing that overload thing.
Sorry if I sound like an idiot, If theres any way I can show you whats happening (better than I've already described) I'll try.
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You definitely don't sound like an idiot, it's just that what you're describing sounds anomalous. It may even be a bug. The most helpful thing would be if you could take and post a few screen caps of the "changes" block of your audio path (or transcribe it). If you're not familiar, the audio path icon (right belowa nd to the left of the search box) shows everything the DSP blocks are doing in a line by line format, so specifically I'd like to know what your audio path has in it when there are overflows, and what your audio path looks like after you've turned off the copy filters and aren't getting overflows. The differences between the two should provide a clue about where the issue is if it's a settings issue.
I definitely can't reproduce the issue you're descibing here so either there's another setting somewhere causing this, or we may have bug. But if it's a bug, I'm not seeing it yet, so let's keep doing differential diagnosis.
mattkhan:
One thing confuses me in this thread and that's that these 2 statements seem to contradict each other. I might be misunderstanding how it is configured but thought it worth checking;
--- Quote from: lisbethfox on August 13, 2015, 01:03:11 pm ---pretty much for the 2.0 zone its 7.1 channels with no up mixing then the only DSP is Parametric EQ which has the following
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--- Quote from: lisbethfox on August 13, 2015, 12:53:34 pm ---I currently do nothing in room correction other than generation of sub signals
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I read this as meaning you have a crossover implemented in the room correction module as well as channels being copied around in PEQ. If so, and depending on exactly how RC is configured and the order things are listed in in DSP, then wouldn't this result in a doubling up of some content?
Some pics of the DSP blocks and the audio path would no doubt clarify this.
lisbethfox:
Sorry mate forgot to clarify, was talking about 2 different zones there. I use zoneswitch (sometimes its a little buggy and I have to manually switch every once in a while) to go between a zone for 2.0 music has no 'room correction' which derives its sub signal in PEQ, and a zone for multichannel content both music and movies which instead of generating the sub signal in PEQ its done within 'Room Correction'.
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