Re: [linux-audio-dev] Fixed vs Floating point comparison.

(resent, previously sent from non member account) First: Is the code correct? pos=lrintf(counter); Shouldn't pos be lower than counter and pos+1 higher? Like this pos <= counter < pos+1 pos = (int)(counter); => I use this in my tests. Second: Why the 'volatile'? You should never be that timing sensitive that it makes a difference... (let the producer enter an interrupt and...) Third: Compilators hates pointers and loves arrays - strange ehh.. Modified the code to this, note the added loop counter. int ix; for (ix = 0; ix < todo; ix++) { pos=(int)(counter); counter+=advance_f; res = src_ptr[pos]; res_next = src_ptr[pos+1]; res += (res_next-res) * (counter-(float)pos); res *= volume_f; dst_ptr[ix] +=res; } Results: PIII 933 MHz volatile non volatile pointer dst 5.0 s 4.9 s array dst 4.5 s 4.1 s /RogerL -- Roger Larsson Skellefteå Sweden