Bying a Freerunner with the "buzz"-fix on it

Rask Ingemann Lambertsen rask at
Wed Apr 15 01:10:32 CEST 2009

On Sat, Apr 04, 2009 at 02:33:14PM -0700, Steve Mosher wrote:

> Cédric Berger wrote:

> > And if it is the buzz fix (by adding the cap) that causes potential
> > problems... what about the SOP currently applied to freerunners ? They
> > may be impacted by incorrect ALSA states ?
>   Yes, that was a concern of mine as well, so this too had to be checked 
> and verified. The complication being that a reworked A6 can only be 
> distinguished AFAIK by visual inspection and not by checking a bit in 
> the hardware.

   Perhaps you could turn on MICBIAS and measure for how long the current is
higher than normal as the capacitor charges. See "MICBIAS CURRENT DETECT" in
the WM8753L manual.

Rask Ingemann Lambertsen
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