[no subject]

[Dan Ellis <dpwe@xxxxxxxxxxxxxxxxx>]

Dear List -

Jamie Mazer <mazer@ladyday.mit.edu> sent me this message for posting
to the list concerning the problems in channel separation between
headphones.

  DAn.

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From: Jamie Mazer <mazer@ladyday.mit.edu>
Subject: Re: sony MDR V6 headphones

About the cross talk problems due to common grounds:

According to RealTime:
> bummer.

Not really -- if you're careful, you can separate the two
earphones from a pair of MDR's and just attach (solder) a
new mini-phono jack to the earphone that's left connector-less
after the surgery.

The MDR's use a sort of very fine coax-like 3 conductor
wire.  You can split the two earphones where the L and R
lines separate and put on the new jacks there.  This works
well -- the earphone-pairs are usually pretty well matched,
so you don't really want to mix and match across earphones
if you can help it (according to Sony).

Just be careful when soldering -- don't overheat anything and
use a flame or sharp scalpel blade to strip the insulation off
the cables (it's a paint-like insulation).

Or at least this all applied to the last pair of MDR earphones
I used for dichotic experiments bought a couple years ago.

One last caveat -- be careful if you're using a sound blaster
or similar hardware to play out signals.  Many of the SB cards
have common grounds too and this will ruin all that work!

/jamie

--
email: mazer@ladyday.mit.edu           mail: MIT,  E25-634
phone: 617-253-5751(office)/-5792(lab)       45 Carleton St
  fax: 617-253-8943                          Cambridge, MA 02139
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