AC_FMT_MULT_SHIFT
mul = (format & AC_FMT_MULT_MASK) >> AC_FMT_MULT_SHIFT;
(AC_FMT_BASE_##base##K | (((mult) - 1) << AC_FMT_MULT_SHIFT) | \
format |= BPT_MULTIPLIER << AC_FMT_MULT_SHIFT;