Hamish Moffatt wrote:
> Sound card bandwidth is going to be a problem at some stage. Given
> the maximum sampling rate of 44.1kHz, you can have a maximum bandwidth
> of 22.05kHz (and probably half again for better results). How flat
> is the input and output response of your sound card? That could cause
> a problem too. CPU load will increase too.
Another way to look at this is that you have a maximum symbol rate of
44100/s.
With normal QAM64 (I think the linmodem code implimentes this) you pack
6bits/symbol, giving a raw datadate of 33075bits/s.
So I don't think the rate is the limiting factor. :)
I dont know if your typical soundcard provides enough signal quality to
impliment this, but I wouldn't be supprised.
