Just add the line-in ASIO file to a playlist. Then you can play it later any time. It just has the filename: live://asio.
this is not useless but it's not terribly useful either, the scenario here is basically the preamp one so a typical audio interface that has inputs will have many inputs and you may use these for different purposes. For example
* something via the analogue inputs (some audio playback device of some sort)
* something via SPDIF (a cable box maybe?)
* a pure digital feed (e.g. using audio device loopback for REW measurements)
this means at least 3 different selections for channel count and offset
if you could store something like live://asio?offset=5&count=2&device=ABC as a named item then that would work nicely
It looks like for buffer size it uses the ideal buffer size returned by ASIOGetBufferSize which should be pretty tight with most hardware,
my point is that I have to increase the buffer size dramatically to maintain stable playback, e.g. increasing buffers from 192 samples to 1280 samples (at 48kHz) to avoid persistent glitches (still not perfect but is better). I suspect it does relate to complexity (latency) of the DSP engine configuration but I think this should be something jriver should deal with (as it presumably does when playing from a file source).