On Sun, Jan 9, 2011 at 11:09 AM, Ralf Mardorf <ralf.mard...@alice-dsl.net>wrote:
> On Sun, 2011-01-09 at 16:35 +0100, Ralf Mardorf wrote: > > On Sat, 2011-01-08 at 22:28 +0100, Thomas Orgis wrote: > > > Am Sat, 8 Jan 2011 14:47:46 -0500 > > > schrieb Mike Holstein <mikeh...@gmail.com>: > > > > > > > ground lift added to the plug on the laptop quieted down my firewire > > > > interface, > > > Still sad that that's necessary, isn't it? > > > > No, ground lift is even used for professional studio equipment, e.g. the > > Brauner VM1 power supply. It's not cutting ground, but decoupling it by > > a capacitor. At home I added a ground lift to my SPX90II, without a > > capacitor, I simply cut ground if needed and I seldom need to use it, > > but it can happen that it's needed even in professional studios. This > > shouldn't be needed for equipment that durable is installed to studio > > racks, but could happen for additional equipment. > > PS: I read that diodes should be the right way for a ground lift (a > resistor and capacitor could be add in addition), it's said that the > diodes need to be able to stand more but 1A, otherwise they burn, before > the fuse will do it. It's also said that usually only tube equipment > should be dangerous, when ground is completely cut, but I don't think > so. > Btw. I had potential differences for an analog mixer and my guitar - > with ground added to the strings - connected to a transistor guitar amp, > when using the same power feed. There wasn't noise, but it wasn't funny > to touch the strings and the mixer at the same time. The amp was > connected to the ground, while the mixer shipped with a european plug = > no ground, but the one on the neutral. > > > -- > Ubuntu-Studio-users mailing list > Ubuntu-Studio-users@lists.ubuntu.com > Modify settings or unsubscribe at: > https://lists.ubuntu.com/mailman/listinfo/ubuntu-studio-users > i know this thread is long since dead, but i did get my tascam 122l working recently.. i found a forum post at linuxmusicians suggesting starting JACK like this... jackd -RP50 -dalsa -dusb_stream:1 -r44100 -p64 -n2 worked great, although i did tweak to -p512 for somethings... heres the link http://www.linuxmusicians.com/viewtopic.php?f=6&t=1073 -- MH http://opensourcemusician.libsyn.com/ http://wnclug.ourproject.org/
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