14 Jan
2009
14 Jan
'09
3:04 a.m.
Justin Smith wrote:
On Tue, Jan 13, 2009 at 12:53 AM, david
<gnome(a)hawaii.rr.com> wrote:
Thanks for the suggestion about it being a ground loop. I tried it at
home here with the laptop on battery power - with no change.
At my office, there was no noise problem at all.
The difference is that at home I was plugging the card into an powered
external USB hub (ZoneNet 7-port USB2). I reshuffled USB connectors to
give the sound card its own USB port and the noise went away.
Lovely sounding card - amazing how the Intel HDA sound chip makes the
sound muddy, murky and distorted ...
--
David
gnome(a)hawaii.rr.com
authenticity, honesty, community
Is it normal for it to have more-or-less constant
low-frequency pops and
crackles while playing quiet passages, and occasional louder pops even
in louder passages? These are files that were digitally generated
(sample recordings of the Aeolus organ synthesizer) or ripped from CDs,
so they weren't analog recordings that might have such additional
natural sounds.
Try the "test audio and midi" menu item in puredata, with the test
signal on the "-40" setting (or some other low level reference signal
of your choosing). If you get the same low frequency pops and static,
it is your sound card or driver (most likely the card). From your
description it could be a ground loop - does it go away if the sound
card is attached to a laptop on battery power?