It appears sound cards can be easily modified to be DC responding through a 
front-end amplifier with an appropriate DC offset, and of course, removal 
of the coupling capacitor:
http://www.qsl.net/om3cph/sb/dcwithsb.htm

Michael
http://photo.net/photodb/member-photos?user_id=423056&include=all

At 07:50 PM 19/07/2005, you wrote:
>In a message dated 18/07/2005 19:31:08 GMT Daylight Time, 
>mike8s2@......... writes:
>installed some larger-capacitance-value coupling capacitors on my 24-bit 
>sound card so I could resolve lower frequencies.  What is a good 
>datalogging app to
>use with this?


It appears sound cards can be easily modified to be DC responding through
a front-end amplifier with an appropriate DC offset, and of course,
removal of the coupling capacitor:

http://www.qsl.net/om3cph/sb/dcwithsb.htm


Michael

http://photo.net/photodb/member-photos?user_id=423056&include=all


At 07:50 PM 19/07/2005, you wrote:

In a
message dated 18/07/2005 19:31:08 GMT Daylight Time, mike8s2@.........
writes:



installed some larger-capacitance-value coupling capacitors on my
24-bit sound card so I could resolve lower frequencies.  What is a
good datalogging app to


use with this?