On Wed, 2 Feb 2000, Gerd wrote:
> > standard sound drivers (either OSS or ALSA).
>
> According to Thomas Sailer, there is a problem of those drivers not being
> capable of switching from playback to record/sample mode fast enough.
> It may also be not very easy to get FSK RX/TX filters as well as other signal
> processing "goodies" working with them.
> At least those were the reasons for Thomas Sailer why he decided to write a
> separate SoundModem driver.
Seems like there is a simple solution today: Most modern cards can do full
duplex. Just record and play at all times. :)
There might be latency issues in the audio paths though.
I imagine that with the low-latency patches, you could impliment
soundmodem in userspace. But it probably wouldn't work on the same low end
boxes that make soundmodem so fun today.
(I.e. I could pull a 486/66 out of a dumpster and in an afternoon convert
it into a packet node)
