with the following bitstream [ff_mic12_SbSb001_-stereo_24400_16.bit](/uploads/9ef43fc3c9fd8746a614c9e94e5ab558/ff_mic12_SbSb001_-stereo_24400_16.bit) and this command line IVAS_dec STEREO 16 bit syn the low-rate mode is triggered and before calling the function decod_gen_2sbfr_ivas_fx(), all parameters are converted from float to fixed point. In ivas_td_low_rate Ln552 : floatToFixed_arr(Aq, Aq_fx, Q14, NB_SUBFR16k * (M + 1)); In fixed point, the filter Aq should be represented in Q12, not Q14, that leads to an overflow in invo_dec -> cb_shape -> syn_filt_s_lc_fx. SHA aa0d22c