Re: [NTLK] eMate microphone

From: Adriano (adriano.angelillis_at_gmail.com)
Date: Sun May 08 2005 - 04:16:46 PDT


Il giorno 08/mag/05, alle 03:30, Clayton Mitchell ha scritto:

I don't know if I am a little slow this weekend or if I am over thinking
this. Are these just the diagrams for soldering a mic onto (I know the
interconnect side is). Or are you saying that the audio out port can
also be used as an audio in port if you connect a microphone (powered I
assume) to it?

Hi Clayton,

i can say you understood it fine, the photos on the website are
diagrams of the eMate mainboard internal connections
where to solder a audio input [and a second serial port to the eMate
for developers who would want to test it and do not have a modded
interconnect adapter]

I succesfully tested the eMate audio input lines just connecting a
external microphone directly onto the connections showed in the hack
webpage.
I did not make any other test, so i cannot say which will be the listen
results when soldering the audio input lines over the already present
audio out jack.

I personally would prefer to phisically put the audio input jack near
the interconnect port, using thin short wires.
It will need a hole to be drilled in the eMate case for taking place of
a input jack, but this choice will cover the serial port when a
microphone is attached there.

For people who do not prefer to make such modification to their eMate
case, i put a second option,
as one could solder the audio input signals over the audio jack
line-out pins.
This option is just a compromise, and we all know that compromises are
usually the worst choice.

Notice that when a 3.5mm plug is inserted in the eMate audio out jack,
the system will automatically enable the line-out preference, disabling
the internal speaker.
Then the external line-out cannot be manually disabled using the
preference panel.

When soldering the input signals over the audio out jack pins, it will
let you have both input and output signals contemporary.

Although this way one could import/record a mp3 song (while playing) in
newton format audio file,
i think neither the sound quality will be acceptable, nor the eMate CPU
could handle so much work.

The Newton audio input will need a amplified microphone (on a MP2k the
same as on a eMate),
i used a modded Plaintalk microphone to test the eMate audio input
functionality.

The amazing news is that on my tests 'Voicenotes' enabled the eMate
line input succefully, without the need of any additional eMate system
software hack.

For any additional info or clarifications please just drop a line.

Kind regards,

Adriano Angelillis

-- 
This is the NewtonTalk list - http://www.newtontalk.net/ for all inquiries
Official Newton FAQ: http://www.chuma.org/newton/faq/
WikiWikiNewt for all kinds of articles: http://tools.unna.org/wikiwikinewt/


This archive was generated by hypermail 2.1.5 : Sun May 08 2005 - 06:00:02 PDT