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

From: Lee Revell <rlrevell@email-addr-hidden-job.com>
Date: Mon Nov 13 2006 - 02:28:46 EET

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.

Lee
Received on Mon Nov 13 04:15:27 2006

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