Re: [LAD] A little quiz about audio measurements...

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

To: Gabriel M. Beddingfield <gabrbedd@...>

Cc: <linux-audio-dev@...>

Subject: Re: [LAD] A little quiz about audio measurements...

Date: Friday, May 28, 2010 - 6:50 pm

Gabriel M. Beddingfield wrote:

quoted text>

>

> On Fri, 28 May 2010, Folderol wrote:

>>

>> Once you connect the analogue side of the the USB device to the

>> installed (high quality card) you have an earth loop that traverses

>> both the analogue and digital domains. You also have an +5V loop (unless

>> the USB device is externally powered) This loop does not exist when the

>> USB card is self testing. I still can't think exactly how, but I

>> believe this is likely to be a significant part of the problem.

>

> OK... but ground loops usually produce noise or a DC offset, right?

> What could be causing the ground loop to oscillate?

>

> -gabriel
Somebody ask for ground lift before, this is regarding to your thoughts.

I was thinking about differences for ground leakage.
No, it isn't ground.

_______________________________________________

Linux-audio-dev mailing list

Linux-audio-dev@lists.linuxaudio.org

http://lists.linuxaudio.org/listinfo/linux-audio-dev

Previous message: [thread] [date] [author]
Next message: [thread] [date] [author]

Messages in current thread:

[LAD] A little quiz about audio measurements..., , (Fri May 28, 12:36 pm)

Re: [LAD] A little quiz about audio measurements..., Niels Mayer, (Fri May 28, 3:31 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:00 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 3:42 pm)

Re: [LAD] A little quiz about audio measurements..., Karsten Wiese, (Sun May 30, 2:06 pm)

Re: [LAD] A little quiz about audio measurements..., Karsten Wiese, (Sun May 30, 4:08 pm)

Re: [LAD] A little quiz about audio measurements..., Niels Mayer, (Fri May 28, 6:27 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:39 pm)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 7:14 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:17 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 9:24 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 10:33 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 10:31 pm)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Sat May 29, 1:59 am)

Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Fri May 28, 11:56 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sat May 29, 6:30 am)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Sat May 29, 6:42 am)

Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Sat May 29, 3:58 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sat May 29, 7:14 am)

Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Sat May 29, 4:19 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Sun May 30, 5:29 am)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sun May 30, 11:05 am)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Sun May 30, 12:29 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Sun May 30, 12:35 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 10:42 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:30 pm)

Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 5:40 pm)

Re: [LAD] A little quiz about audio measurements..., James Morris, (Fri May 28, 6:28 pm)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 6:15 pm)

Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:23 pm)

Re: [LAD] A little quiz about audio measurements..., Folderol, (Fri May 28, 6:34 pm)

Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:40 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 7:12 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:50 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:52 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:26 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:22 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 5:58 pm)

Re: [LAD] A little quiz about audio measurements..., Gabriel Beddingfield, (Fri May 28, 5:50 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:57 pm)

Re: [LAD] A little quiz about audio measurements..., Gabriel M. Beddingfield, (Fri May 28, 6:08 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 6:18 pm)

Re: [LAD] A little quiz about audio measurements..., Arnold Krille, (Fri May 28, 5:24 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 4:33 pm)

Re: [LAD] A little quiz about audio measurements..., torbenh, (Fri May 28, 4:25 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 4:39 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 4:34 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 3:24 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 3:40 pm)

Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:05 pm)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 5:00 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:21 pm)

Re: [LAD] A little quiz about audio measurements..., Folderol, (Fri May 28, 5:26 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:37 pm)

Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:39 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 3:39 pm)

Re: [LAD] A little quiz about audio measurements..., Veronica Merryfield, (Fri May 28, 6:55 pm)

Re: [LAD] A little quiz about audio measurements..., Ricardus Vincente, (Fri May 28, 7:15 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:20 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:07 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 7:14 pm)

Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 5:22 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 8:07 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 8:52 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 9:12 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 9:34 pm)

Re: [LAD] A little quiz about audio measurements..., , (Fri May 28, 10:05 pm)

Re: [LAD] A little quiz about audio measurements..., Jens M Andreasen, (Fri May 28, 10:31 pm)

Re: [LAD] A little quiz about audio measurements..., Florian Faber, (Fri May 28, 4:54 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 5:04 pm)

Re: [LAD] A little quiz about audio measurements..., Chris Cannam, (Fri May 28, 2:53 pm)

Re: [LAD] A little quiz about audio measurements..., Ralf Mardorf, (Fri May 28, 3:05 pm)

Re: [LAD] A little quiz about audio measurements..., Robin Gareus, (Fri May 28, 3:27 pm)

Re: [LAD] A little quiz about audio measurements..., Gene Heskett, (Fri May 28, 2:37 pm)

Re: [LAD] A little quiz about audio measurements..., Florian Faber, (Fri May 28, 1:35 pm)