recording on realtime to/from soundcard

[MariaB]

hi!
i almost finished recording, but i have a little problem.
my problem is : the sound that coming out from soundcard after recording is broken.
what i did:
i opened 3 buffers for writting from sound card.
if one of the biffers was filled than there is callback function that called for output from soundcard. and that buffer is written out. during it, there is 2 buffers that continue to recording from soundcard.
i get a broken sound from soundcard.

thanks.:p