Major interference issue.

Whenever I am trying to record audio, or play audio through anything other than a passive output, I get a high pitched buzzing/popping sound. I set about investigating what in my room was causing the noise using a microphone, and whenever the microphone was placed in the vicinity of my trackpad, the microphone's induction coil went nuts and starting picking up the very same interference that I was picking up when trying to record.
I can guarantee it was only the trackpad, because it only happened when the microphone was within a centimetre of it, and no matter where the laptop was placed. Is there any way I can temporarily cut off the power to my trackpad to stop this interference problem while trying to record? (I have tried using the disable switch above the trackpad, it does not affect the interference.)

Hi there,
I bought a brand new Dv7 the other day that is a bit higher spec than yours but I have a similar DPC Latency issue that causes pauses in audio and freezes in the system. I downloaded a DPC latency checker and began the process of narrowing down the the culprit causing the latency. Turns out my WiFI card (Ralink RT5390) was the culprit as when I disabled the adapter in device manger my DPC Latency returned to normal levels.
After ding a little bit of searching I found that supposed solution is to download the latest drivers for the WiFI adapter as well as the latest BIOS update and just for safet's sake the latest audio driver too. I did this and I had no real change. Before you blame the AC adapter maybe you should go through the same process. Perhaps look at your power management settings and see if the wireless card is disabled when the machine is not plugged in? As that would make sense with my issue.
It is of course possible that your AC Adapter is causing your issue but mine is definitely coming from the WiFi Adapter.
Wis I could be of more help. 

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    As seen in the last example, my Japanese fonts are all installed, and SKIM is working as it should in any non-KDE app, suggesting that there are no problems on that end. The issue seems to be with something in KDE, but I have no idea where to begin fixing it. Furthermore, I have no idea what could have caused this issue in the first place. I don't see how installing a window manager or terminal emulator package could have screwed up my fonts, and the .Xdefaults file I wrote just contained config information for urxvt. Nothing else. I even ended up deleting that, but it did not fix my problem.
    If you could be of any help, I'd really appreciate it. I have a lot of files with foreign characters in them, and being able to read them is essential.
    Last edited by LighthouseKeeper (2008-04-20 00:57:36)

    I was just looking into locales, actually.
    My current locale is:
    LANG=en_US.utf8
    LC_CTYPE="en_US.utf8"
    LC_NUMERIC="en_US.utf8"
    LC_TIME="en_US.utf8"
    LC_COLLATE=C
    LC_MONETARY="en_US.utf8"
    LC_MESSAGES="en_US.utf8"
    LC_PAPER="en_US.utf8"
    LC_NAME="en_US.utf8"
    LC_ADDRESS="en_US.utf8"
    LC_TELEPHONE="en_US.utf8"
    LC_MEASUREMENT="en_US.utf8"
    LC_IDENTIFICATION="en_US.utf8"
    LC_ALL=
    and locale -a brings up:
    C
    POSIX
    en_US.utf8
    Is there anything here that could be causing this issue?
    I'm curious how my locale got messed with in the first place if this is indeed the problem...
    and here is my export:
    declare -x COLORTERM=""
    declare -x DESKTOP_SESSION="kde"
    declare -x DISPLAY=":0.0"
    declare -x DM_CONTROL="/var/run/xdmctl"
    declare -x GS_LIB="/home/rael/.fonts"
    declare -x GTK2_RC_FILES="/etc/gtk-2.0/gtkrc:/home/rael/.gtkrc-2.0:/home/rael/.kde/share/config/gtkrc-2.0"
    declare -x GTK_IM_MODULE="scim"
    declare -x GTK_RC_FILES="/etc/gtk/gtkrc:/home/rael/.gtkrc:/home/rael/.kde/share/config/gtkrc"
    declare -x HOME="/home/rael"
    declare -x KDE_FULL_SESSION="true"
    declare -x KDE_MULTIHEAD="false"
    declare -x KDE_SESSION_UID="1000"
    declare -x KONSOLE_DCOP="DCOPRef(konsole-19951,konsole)"
    declare -x KONSOLE_DCOP_SESSION="DCOPRef(konsole-19951,session-1)"
    declare -x LOGNAME="rael"
    declare -x OLDPWD
    declare -x PATH="/opt/kde/bin:/usr/local/bin:/usr/bin:/bin:/usr/bin:/usr/games"
    declare -x PWD="/home/rael"
    declare -x QT_IM_MODULE="scim"
    declare -x SESSION_MANAGER="local/broadway:/tmp/.ICE-unix/19566"
    declare -x SHELL="/bin/bash"
    declare -x SHLVL="2"
    declare -x SSH_AGENT_PID="19539"
    declare -x SSH_AUTH_SOCK="/tmp/ssh-MtdHR19538/agent.19538"
    declare -x TERM="xterm"
    declare -x USER="rael"
    declare -x WINDOWID="41943050"
    declare -x XCURSOR_THEME="default"
    declare -x XDM_MANAGED="/var/run/xdmctl/xdmctl-:0,maysd,mayfn,sched,rsvd,method=classic"
    declare -x XMODIFIERS="@im=SCIM"
    Last edited by LighthouseKeeper (2008-04-19 22:31:16)

  • Major Mixing Issue

    Hi,
    This is a simple test. You might want to try it yourself. It only takes a minute or two.
    When the Test Oscillator plug is inserted in one stereo track (let's say 1KHz @ -12db) then that track is bussed to Output 1-2 > then the level seen on the meters for *Output 1-2 is -12db*. That's good and as it should be.
    When a second Test Oscillator plug is inserted (and operating simultaneously with the Test Oscillator on Track 1) then that track is bussed to Output 1-2 > then the level seen on the meters for *Output 1-2 is -6db*. Hmm, the power has doubled.
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    Is there some shortcut to get around this additive summing effect? Is there something in Preferences that I've missed?

    KennaOkoye wrote:
    Ischwartz, What should the Pan be set to, I have it at compensated.... Should it be at zero?
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  • Possibly unique interference issue. Is TC the answer?

    I'm sure there are some similar topics on this forum, but I feel I may have a slightly unique issue...
    Let me start by saying I'm currently using an Airport Express, MacBook Pro 3.1, iPhone 4 and the new AppleTV. I, like many others, am having trouble with radio frequency interference. At night, I have a great wifi connection...during the day, however, I have no wifi and my Airport doesn't even show up in Airport Utility.
    I'm pretty sure I've pinpointed my problem. My apartment is directly above a hobby store that specializes in radio controlled toy planes, trains and automobiles. Radio frequency overload.
    I've moved my Airport around, messed around with different channels in Airport Utility and turned on interference robustness...still nothing.
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