#4 podxt - noise during playback

[Anonymous]

Hello,

I'm using my PODxt & line6usb driver (& ardour) for more than three months. All have been working perfectly on my old desktop (ubuntu 7.04), but now I must use a newer laptop PC (acer 9420, ubuntu 7.10). Since I've changed my computer, some strange noise (like when you move your jack connector) is continuously taking place when I play/record music (is not a jackd problem: it happens all the time... for example, when I use an mp3 player with alsa support). I've tried the 0.7.2 and 0.7.3 driver version, with the same results. I've recompiled the driver with the debug mode enabled, and I can see these messages on dmesg/syslog:

...
[ 255.589763] line6usb 2-1.2:1.0: R0000: F5 00 01 0C 03 0F F7 .......
[ 255.589773] line6usb 2-1.2:1.0: unknown sysex message 0F
[ 255.617852] line6usb 2-1.2:1.0: R0000: F5 00 01 0C 03 0F F7 .......
[ 255.617864] line6usb 2-1.2:1.0: unknown sysex message 0F
[ 255.653052] line6usb 2-1.2:1.0: R0000: F5 00 01 0C 03 0F F7 .......
[ 255.653061] line6usb 2-1.2:1.0: unknown sysex message 0F
[ 255.684536] line6usb 2-1.2:1.0: R0000: F5 00 01 0C 03 0F F7 .......
[ 255.684547] line6usb 2-1.2:1.0: unknown sysex message 0F
[ 255.727459] line6usb 2-1.2:1.0: R0000: F5 00 01 0C 03 0F F7 .......
[ 255.727471] line6usb 2-1.2:1.0: unknown sysex message 0F
...

are they common messages? could they be related to my problem?

I also show a lspci output (maybe it is related to my usb controller...):

$ lspci
00:00.0 Host bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express Memory Controller Hub (rev 03)
00:01.0 PCI bridge: Intel Corporation Mobile 945GM/PM/GMS, 943/940GML and 945GT Express PCI Express Root Port (rev 03)
00:1b.0 Audio device: Intel Corporation 82801G (ICH7 Family) High Definition Audio Controller (rev 02)
00:1c.0 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 1 (rev 02)
00:1c.1 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 2 (rev 02)
00:1c.2 PCI bridge: Intel Corporation 82801G (ICH7 Family) PCI Express Port 3 (rev 02)
00:1d.0 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #1 (rev 02)
00:1d.1 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #2 (rev 02)
00:1d.2 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #3 (rev 02)
00:1d.3 USB Controller: Intel Corporation 82801G (ICH7 Family) USB UHCI Controller #4 (rev 02)
00:1d.7 USB Controller: Intel Corporation 82801G (ICH7 Family) USB2 EHCI Controller (rev 02)
00:1e.0 PCI bridge: Intel Corporation 82801 Mobile PCI Bridge (rev e2)
00:1f.0 ISA bridge: Intel Corporation 82801GBM (ICH7-M) LPC Interface Bridge (rev 02)
00:1f.2 IDE interface: Intel Corporation 82801GBM/GHM (ICH7 Family) SATA IDE Controller (rev 02)
00:1f.3 SMBus: Intel Corporation 82801G (ICH7 Family) SMBus Controller (rev 02)
01:00.0 VGA compatible controller: nVidia Corporation G72M [Quadro NVS 110M/GeForce Go 7300] (rev a1)
02:00.0 Ethernet controller: Realtek Semiconductor Co., Ltd. RTL8111/8168B PCI Express Gigabit Ethernet controller (rev 01)
05:00.0 Network controller: Intel Corporation PRO/Wireless 3945ABG Network Connection (rev 02)
0a:06.0 CardBus bridge: Texas Instruments PCIxx12 Cardbus Controller
0a:06.2 Mass storage controller: Texas Instruments 5-in-1 Multimedia Card Reader (SD/MMC/MS/MS PRO/xD)
0a:06.3 Generic system peripheral [0805]: Texas Instruments PCIxx12 SDA Standard Compliant SD Host Controller

And the installed alsa version:

$ dpkg --list alsa*
Desired=Unknown/Install/Remove/Purge/Hold
| Status=Not/Installed/Config-f/Unpacked/Failed-cfg/Half-inst/t-aWait/T-pend
|/ Err?=(none)/Hold/Reinst-required/X=both-problems (Status,Err: uppercase=bad)
||/ Name Version Description
+++-=============================-=============================-==========================================================================
un alsa <none> (no description available)
ii alsa-base 1.0.14-1ubuntu2 ALSA driver configuration files
un alsa-oss <none> (no description available)
ii alsa-utils 1.0.14-1ubuntu4 ALSA utilities

Could you take a look? I'm really frustrated with this problems.

Thanks a lot!

caba

[Serrano]

I'm using the TonePort GX and I'm also experiencing noise on Ubuntu 10.04. There is no noise when I play softly, but as soon as I hit the strings hard the noise kicks in, a really loud noise which makes playing unpleasant.