[linux-audio-user] Re: The famous "Jack Hum" (Can't record and desparate)

[Karsten Wiese]

Am Montag, 13. November 2006 01:28 schrieb Lee Revell:
> On Sun, 2006-11-12 at 21:29 +0100, Carlo Capocasa wrote:
> > > But the most intriguing part of the whole story: Not only did the noise 
> > > get louder at a lower latency, it also seemed to precisely double its 
> > > frequency when running at halve the number of frames. I even tried to 
> > > measure the frequency of the noise. As far as I remember, when running 
> > > jack for instance at 44100Hz, periodsize 32, the noise was at exactly 
> > > 44100/32 = 1378Hz!
> > 
> > That is absolutely fascinating. I WILL investigate this; if it
> > coincides, we have a VERY strong case that this is the same problem. 
> 
> Really sounds like you have a singing capacitor.  IOW your problem is
> cheap hardware.  If this is the case, you won't be able to fix it.
> 
Guess Lee is right.
Does noise vanish when laptop is running on battery?

Erm, and what exactly is that laptop called?,
so I can avoid to buy one of those ;-)

Karsten