<html><head></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I tried using the fft transform( float[] ) function to input frames manually, and found a thread from 2009 illustrating that this doesn't work - the manually input frame is ignored and the accumulated frame is used.<div><br></div><div>Boldly venturing into the ChucK source code (for the first time), I think I found the issue. The FFT_object::transform(Chuck_Array8 * frame) method sets m_buffer to the input array then calls FFT_object::transform(); but then m_buffer gets set to the accumulated array before the rfft.</div><div><br></div><div>By copying essentially all the code from transform() into transform(Chuck_Array8 * frame) but removing the line</div><div><br></div><div><div style="margin-top: 0px; margin-right: 0px; margin-bottom: 0px; margin-left: 0px; font: normal normal normal 11px/normal Menlo; "> m_accum.get( m_buffer, m_window_size );</div></div><div><br></div><div>and not calling transform() I managed to compile a version that works as I expect it to - I'm not sure if there are other complications that make this a more difficult fix.</div><div><br></div><div>I hope to learn a bit more about ChucK's inner workings so please let me know if I'm misunderstanding anything above.</div><div><br></div><div>-Julian</div></body></html>