[maemo-developers] [maemo-developers] api to write to the rs-mmc

[From: Koen Kooi]

Alexander.Farber at nokia.com wrote:
> Hi, 
> 
> I know nothing about soldering and HW, but have read recently that the 
> iPod Linux uses one earphone as a microphone (is that possible at all?)

A slighty oversimplified explanation:

A microphone is basically a 'reversed' speaker, it converts motion
(vibrations on the membrame) to power (current through the wire). If you
know that the plug in the device has a microphone-input wired up to the
earphone socket, you can use and earphone as a microphone.

So if the hardware supports it (the wires in the socket connect to a pin
on the chip that can record), you can use both a normal microphone and
an earplug as a means to record sound.
It all depends on the internal wiring and the configurability of the chip.

Another option is to modify a bluetooth headset to function as a
line-in, since it has been mentioned the 770 will support headsets.

hope this helps,

Koen



> 
> Regards
> Alex 
> 
> 
>>-----Original Message-----
>>From: maemo-developers-bounces at maemo.org
>>[mailto:maemo-developers-bounces at maemo.org]On Behalf Of ext Juha Yrjölä
>>
>>It'd also work nicely as a guitar effects processor due to the powerful
>>DSP.  The line-in jack is not going to be there, but with a bit of
>>soldering you might have some success. =)
>>
>>Cheers,
>>Juha
> 
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