At Sat, 27 Oct 2012 16:18:43 +0800,
James Harkins wrote:
Has anyone else had this problem? For some pieces
using live mic input, I wanted to reduce latency
by pulling the Jack IO buffer size down to 512 samples from the default 1024. (I also
tried 256
samples, but that just made Jack crash.)
But with the smaller buffer, the mic gets an additional 30-40 dB of gain, making the
input
unusable. If I turn the preamp on the fast track down very very low and speak quietly
into the
mic, the sound comes through without obvious distortion or glitches, so it doesn't
seem to be an
xrun thing. But it distorts very easily and very badly.
If I switch back to 1024 samples, the problem disappears.
Just reconfirming this issue -- with 512 samples in the hardware buffer, the noise floor
was about -20 dB. At 1024 samples, it was -70 dB.
Baffled (and, I guess, resigned to 46.4 ms latency in my concert...),
hjh
--
James Harkins /// dewdrop world
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