[maemo-developers] N800 and USB host mode

From: David Hagood david.hagood at gmail.com
Date: Sun Mar 4 17:27:06 EET 2007
Andreas Hubel wrote:
> Perhaps, you don't need USB as the Nokia 770 and N800 each have an
> speaker and microphone. Okay the microphone at 770 has no jack, but as
> far as i now at N800, but you could also use a bluetooth headset to get
> a line in ;-) 
Bluetooth compresses the audio, destroying the phase relationships upon
which the data is encoded - so Bluetooth in would not work.

While one could theoretically use the N800 headphone jack to interface
to the radio, you would then have to be ABSOLUTELY certain that nothing
other than the GMFSK program were generating audio.

> And as serial device you could use the serial port at the
> backside pins of the device, at least for n700 the pin layout is public.
And you then have to remove the back of the unit, kludge up the serial
interface... Not exactly what I am after. What I want is a simple
package, not a Rube Goldberg device.

Additionally, eventually it would be nice to use one of the OFDM
high-bitrate modems for HF and the Speex vocoder to do digital voice
over HF - which requires both audio I/O to the radio AND audio I/O to
the user.

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