Apr 06, 2010 12:19 pm It's sort of self-evident... If there's leakage and crosstalk, it'll either be there or it won't.
Checking the leakage between the channels of Multichannel Card
Posted on Apr 06, 2010 09:12 am
saviour2009
Member Since: Apr 06, 2010
Hello friends........I am working on a project that makes use of 1010LT Delta M Audio Card for multichannel input as well as output. The project is very much sensitive towards issues like delay between the channels, leakage between the channels and various output issues.
My current task is to find out if there is any leakage between the input channels. Though these audio cards are designed in such a way as to minimize interchannel interference and leakage still my task is to verify if there is any. So can anyone suggest me how to check if there is any leakage or not ??
I will appreciate the suggestions involving some sort of signal processing like making use of some signal processing technique to ensure this case.
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Apr 06, 2010 12:19 pm It's sort of self-evident... If there's leakage and crosstalk, it'll either be there or it won't.
Apr 06, 2010 03:53 pm Thanks for the reply buddy......but it's not as simple as you have replied......actually there are cases when we can not find out the lag between the two sounds (I mean cases beyond the threshold limit of normal ears) and even such minor changes are enough to cause major experimental changes that we encounter during research oriented environment.......so I must say that there should be some other way instead of accessing it perceptually ....
Apr 06, 2010 08:40 pm Accessing it perpetually??? Minor changes are enough to cause major experimental changes that we encounter during research oriented environment????
Are you a mad scientist or an audio engineer? I don't speak this language.
Apr 06, 2010 11:59 pm I beg to differ also... It is *precisely* that self-evident. If you arm a bunch of tracks and record on to one of them and there is leakage on others, there's leakage. If there isn't, there isn't.
It's even one of those cases where you can actually use meters (normally, I'd say something like "use your ears" - But in this case, the meters would be more than sufficient evidence).
THAT SAID -
I went and read this whole thing again and I really can't tell if you're talking about cross-talk or simple ambient leakage (such as a hat into a snare input).
Apr 07, 2010 12:25 pm I have a feeling that most users on here don't have those types of demands on our interfaces. So your own testing may be much further advanced than our experiences.
I don't speak for anyone else, and MM may be the foremost expert in our midst for that level of detail, but most of us aren't that detailed in our audio endeavors.
I am somewhat curious though, is if there is no leakage, then the delay would be moot, as there's nothing on adjacent tracks to compare against. If there IS leakage, then your interface is inadequate for your needs, therefore the delay would again be moot.
I guess that if you are recording independent sources and wish ZERO delay between them, that I guess that does make sense.
I would think recording very sharp transients, and then viewing down to the sample level ( or close to it ) would show you if, or how much delay is between tracks.
I'm not trying to be goofy, just thinking out loud from a troubleshooter's point of view.
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