the sigmatel based
http://www.rockbox.org/twiki/pub/Mai...e_sch_revb.pdf
device now only hums instead of clear recording from the built in electret mic
What should one check first or what circuit to use to hook electret mic to line in input

Connect a line source to the line input and check if it records.

Alternatively, use an electret mic with a pre-amplifier to bring it to line level.

In article , M.Joshi.cd66e59
@diybanter.com says...

;3152458 Wrote:
the sigmatel based
http://tinyurl.com/oetkfn7
device now only hums instead of clear recording from the built in
electret mic
What should one check first or what circuit to use to hook electret mic
to line in input

Connect a line source to the line input and check if it records.

Alternatively, use an electret mic with a pre-amplifier to bring it to
line level.

something tells me the jack for the head set which most likely
has the mic ring on it isn't set well any more. Maybe cracked on
the board or stuck disconnect pin?

Jamie