When running ``` IVAS_cod_flt -stereo 48000 48 ltv16_STEREO.wav bit IVAS_dec_fx stereo 48 bit out.wav ``` There is an assert triggered in frame 6690: ``` Assertion failed: (Q >= 0), function fix16_to_float, file lib_com/tools_fx.c, line 88. ``` This happens in `ivas_stereo_mdct_core_dec_fx.c:974`: ``` st->cngTDLevel_float = fix16_to_float( st->cngTDLevel, ( 15 - st->cngTDLevel_e ) ); ``` Here, `st->cngTDLevel_e` is 16 which causes the value for q to be passed to `fix16_to_float` to be -1, causing the crash.