Thanks. Interesting aspect, which I haven't yet run into. I have done 8
and 16 track recordings of music in Grace Cathedral, but there is so
much time delay in spaces like that it was not a problem - in fact an
advantage if true. I woner if there is a difference in Mac vs Windows,
or one audio app and another. I know plenty of studio people who
routinely work with sessions of 15 to 150 tracks, and the only latency
issues they complain about is from plugins.
Most of my recording is coincident pairs, aften MS, but stereo and not
much 4 channel, though a lot of 16 track live music, and as far as I
have seen, all the tracks play at the same time... I will try making
some recordings in Protools with different signalss simultaneously and
see if they play back at different times. I only do Mac, so if this is
a windows issue no wonder I have never noticed... Never used ASIO
drivers either, being a Protools user.
Food for thought and experiementation.
<L>
On Sep 7, 2005, at 11:32 AM, wrote:
>> Lou Judson wrote:
>> With a single four channel unit would this be a problem?
>
> Most likely, yes. It's an operating system problem, not a device
> problem.
> When you begin recording four channels, most systems give you the
> option of
> recording either four mono files, or two 2-channel files. When it
> opens
> those files (4 or 2), it doesn't do them all at the same time. So the
> recording begins with a tiny time offset between the various files. I
> don't
> know how ASIO drivers fix the problem, but they do. In my case I am
> recording either four or eight channels using an Echo Audio Layla, and
> I was
> getting offsets of as much as several hundred samples. Say its 200
> samples.
> That's 4 milliseconds. Sound travels about 4 feet in 4 milliseconds. =
> If
> your microphones are spaced the 30 or 40 feet in Dan's recommendation,
> it's
> a little bit as though you had moved one of the a few feet. No big
> deal.
> But if the microphones are coincident, then it's as though they are
> suddenly
> not coincident. Big problem!
>
> Eric
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