From: John Deters <jad@dsddhc.com>
Date: Tue, 23 Jul 1996 04:07:11 +0800
To: Jerome Tan <jti@i-manila.com.ph>
Subject: Re: Home Made Telephone Voice Changer
Message-ID: <2.2.32.19960722163544.00331a2c@labg30>
MIME-Version: 1.0
Content-Type: text/plain


On Wed, 17 Jul 1996, Jerome Tan wrote:

> Does anyone know how to make a home-made telephone voice changer?

Well, if you've got your sound card in your computer, if you download Speak
Freely (from http://www.fourmilab.ch) and simultaneously turn on LPC-10
compression along with simple compression, I've found my voice comes out
more like Robbie the Robot than John Deters.  It's an interesting feature of
the LPC-10 compression that as it removes redundancy from the transmission
that it removes the "human identity" from it as well.  There's got to be a
moral to that story somewhere (especially since the NSA developed the LPC-10
algorithm).

John
--
J. Deters  "Captain's log, stardate 25970-point-5.  I am nailed to the hull."
+-------------------------------------------------------+
| NET:   jad@dsddhc.com (work)    jad@pclink.com (home) |
| PSTN:  1 612 375 3116 (work)    1 612 894 8507 (home) |
| ICBM:  44^58'33"N by 93^16'42"W Elev. ~=290m (work)   |
| PGP Key ID:  768 / 15FFA875                           |
+-------------------------------------------------------+