I try to use the fir_decid_fract16 function which is contained in the VDSP++5.0 IDE. This works fine but only up to the buffer length of 131 072. I intended a length of 2 097 152 but this seems to be ignored. The compiler manual does not say something about a maximum value for the length. As it is an int-type I assumed it will work up to the maximum value of int. The processor I use is a blackfin 526 which has only 132 k of internal RAM could this be the reason for this limitation ?