You have to patch the file interface.c in the cdda2wav directory.
I'll make a more handy patch soon.

replace begin:----------------------------------------

    if (interface == GENERIC_SCSI) while (!wait_unit_ready(scgp, 60)) {
	fprintf(stderr,"load cdrom please and press enter");
	getchar();
with:-------------------------------------------

if (interface == GENERIC_SCSI) if (!wait_unit_ready(scgp, 60)) {
	fprintf(stderr,"load cdrom please and press enter");
	/*getchar();*/
end:---------------------------------------------



