Shure digital mics into x32 out to analogue IEM latency issues

Re: Shure digital mics into x32 out to analogue IEM latency issues

Silas Pradetto said:
Can you explain why latency would be generated when compatible outputs and inputs are connected without SRC? I'm not taking AD or DA, I'm just talking digital to digital.
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Any transfer along a serial interface will add at least one sample of latency, so the theoretical minimum latency for any link at 48 KHz will be around 25uS. In practice it will of course be a lot more than that, since there is always some buffering going on as well.
 
Re: Shure digital mics into x32 out to analogue IEM latency issues

Robert Lofgren said:
At 12mS I'd call it a delay that probably won't sound much like a chorus effect. Many guitarists, drummers and keyboard players would feel the 12mS being way too much for them though...
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Of course everyone hears differently, but the general rule of thumb to be able to distinguish the sound as two events is on the order of 25ms. And usually with IEMs you have a fair amount of isolation so you don't have much to compare it with. I think many are much more worried about all of this than there being a real problem. You've learned to deal with the natural acoustic latency from the other players in your band because of their physical positions and don't even think about it. YMMV

Now, how about my freq and bandwidth list I asked about on the line6 forum ;)
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That's mostly proprietary info ... sorry
 
Re: Shure digital mics into x32 out to analogue IEM latency issues

Don Boomer said:
Of course everyone hears differently, but the general rule of thumb to be able to distinguish the sound as two events is on the order of 25ms. And usually with IEMs you have a fair amount of isolation so you don't have much to compare it with. I think many are much more worried about all of this than there being a real problem. You've learned to deal with the natural acoustic latency from the other players in your band because of their physical positions and don't even think about it. YMMV
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Did I not just say that it was 10ms? :razz:

The biggest point that people are making is that the sound from a vocalist in their own head will cause said artifacts, be it comb filtering, chorus, or delay like effects. Honestly, I don't think that it'll be too much of an issue. But if it DOES end up causing one, we've given the OP plenty of places to look. On the other hand, if you're honestly thinking about buying PGX wireless, you're automatically accepting all sorts of other problems along the way, most likely. Delay should be one of the last things you are thinking about.
 
Re: Shure digital mics into x32 out to analogue IEM latency issues

The problem with trying to assign a simple number to audibility of spaced events is that it depends on the nature of the sound. Percussive events are easier to parse than sustained notes with slower attacks. Anyone seriously interested in this can research the work of Haas, Madsen, et al. several decades ago. In general closely spaced sounds are fused into the perception of a single sound source. Comb filtering from delayed persistent sounds is a different issue.

None of this is news to knowledgeable equipment designers.

JR

PS: That video was too difficult to listen to, so I didn't.
 
Re: Shure digital mics into x32 out to analogue IEM latency issues

One way to help with latency problems in IEMs is to add a little reverb. It helps to mask the problem and some singers actually like the effect.
 
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