Around release 0.3.7f (algorithm) modifications were made to egalize the volume
difference between 350 and 500.
I never tried those releases after 0.3.7b(or d).
With the tagged 0.4.0 release I notice a big difference. The 350 is twice as
load as the 500.
I lived with the older 0.3.7 release, but I never noticed such a big volume
difference as with the 0.4.0 release.
Since this is also an issue for me, I like to help in testing.
Ruud
----- Original Message -----
From: "Bryan Mayland" <[EMAIL PROTECTED]>
To: "Discussion list for development of the IVTV driver"
<[email protected]>
Sent: Tuesday, November 29, 2005 3:18 PM
Subject: Re: [ivtv-devel] Please test 0.4.1 branch!
Bryan Mayland wrote:
I upgraded from tags/0.4.0 to branches/0.4 and the recording volume
on my 2 cards (PVR-150, PVR-250 both ntsc) is definitely lower at the
same -y volume= setting as before. I haven't tracked the problem down
yet (I will tonight), but I wanted to check in to see if anyone else
has noticed similar behavior.
My bad. After recording the same thing at the same -y volume on
both cards simultaneously, I see that I was wrong. The PVR-150 has the
correct volume, the PVR-250 has a lowered volume.
This is due to r2954 changing the volume scaling in the msp3400. I
don't think this change is a good thing. Sure, you can crank up the
volume to the point it becomes clipped and overblown, but the driver
shouldn't rescale the volume range to keep you out of an area where you
/might/ encounter that condition.
This also doesn't jive with the volume rescale code I put in the
cx25840-audio unit, since both are based on quantizing the passed volume
to the range specified by the msp3400 datasheet, not the arbitrary limit
imposed by clipping 10% off the volume in the driver.
In any case, the msp3400 change causes me to have to crank my volume
to 65535 to get the same volume I used to get in 0.4.0.
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