Probably that's because the ICE-chipset on the
Delta cards isn't happy
with the 'standard' SB_LE16 or such sample format. And I didn't find
an option in Tapiir to set the ALSA device id or sample format (hint,
hint ;)
You _can_ set the alsa devices:
$ tapiir --alsa -h
Usage: tapiir --alsa [OPTION]...
-h,--help help
-P,--pdevice playback device default hw:0,0
-C,--cdevice capture device default hw:0,0
[...]
Using the plughw:0,0 device (or simply default) should take care of the
sample format conversion.
Maarten