I think I know how to stop the hum, but does anyone know what might be causing the CPU load and full-duplex problems? I'm running kernel 2.4.20 with low-latency, capabilities and ACPI patches (I've tried booting with pci=noacpi and acpi=off without luck).
Thanks, Ben On Monday 16 June 2003 11:16 pm, Ben Saylor wrote: > I recently bought a VXpocket v2 and managed to get it working with > alsa 0.9.4, but I'm having a few problems with it. > > Whenever it's in use by an application, system CPU usage goes up to > 40-70% and stays there, depending on the application. > > If I run pd with -alsa, I get "audio I/O stuck... closing audio" > unless I add -noadc. Pd with -oss doesn't give that error, but tends > to lock up the system. > > Is it possible to control the headphone level independently of the > normal output levels? Also, the headphone output has a terrible > ground loop hum when my laptop and speakers are attached and plugged > in. The same hum can also be heard in the normal outputs, but it's > much quieter. My speakers have balanced inputs and are attached by > balanced cables. > > I'm guessing the buzz is a hardware issue I'll have to live with or > fix with an adaptor of some kind. On the other hand, getting rid of > the buzz was one of the main reasons I decided to buy a separate > audio interface, so this is rather troubling. I chose the VXpocket > over a USB interface (probably the Audiophile USB) because I read > that the latency with current USB 1.1 interfaces is somewhat high, > and I'd like to be able to play my guitar through it. Is this true > with alsa? Also, are USB interfaces with external power supplies > immune to ground loops and interference noise (e.g. from other USB > devices)? > > Thanks, > Ben > > > > ------------------------------------------------------- > This SF.Net email is sponsored by: INetU > Attention Web Developers & Consultants: Become An INetU Hosting > Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly > Commission! INetU Dedicated Managed Hosting > http://www.inetu.net/partner/index.php > _______________________________________________ > Alsa-user mailing list > [EMAIL PROTECTED] > https://lists.sourceforge.net/lists/listinfo/alsa-user ------------------------------------------------------- This SF.Net email is sponsored by: INetU Attention Web Developers & Consultants: Become An INetU Hosting Partner. Refer Dedicated Servers. We Manage Them. You Get 10% Monthly Commission! INetU Dedicated Managed Hosting http://www.inetu.net/partner/index.php _______________________________________________ Alsa-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/alsa-user
