Bouncing Trouble

Question

I am having a problem with Logic Pro version 7.2.3
When I bounce audio, there is twenty seconds of silence in the begining of the track, and the last twenty seconds of the audio intended to be bounced is missing. I have checked to make sure that the bounce positions are indicated correctly in the bounce window. Please help!!!!
Thanks... Joshua

Answer 1

I believe Logic has a bug where it deoes not adequately manage things at the start of bounce. Logic starts to load everything to process audio when it encounters the physical beginning of the file in arrange window. But if actual audio starts too close to the beginning of the file, then depending upon the processing load, Logic can lose processing audio because it is not done starting everything up to process the file (and this can also skew where Logic thinks the file ends). This may result in glitches/noise at the beginning of a bounced file.
So you can try and workaround this by using (or padding) the beginning of our audio files with silence to give Logic enough time to start its audio processing. (You will probably want to edit this extra silence out of the start of the bounced file when you ae done).
If your audio file already has an extra meausre of silence at the start, then tell bounce to start from there. So say your audio file actually starts to rise from zero amplitude at measure 1 1 1 2 and the file physically begins at measure 0 1 1 1. Then tell bounce to start at 0 1 1 1 (or maybe it would work from 1 1 1 1).
I could understand that this padding might sometimes be necessary to do for real-time bouncing. But when real-time bounce munges the beginning of a file, offline bounce can still do the same. Logic should always be able to throttle resources in offline bounce to make sure everything is loaded before the audio actually starts.
Its really sad that this is one of many important things that have been neglected in Logic for a long time, e.g., SRC, full delay compensation, dynamic load balancing, no support for read/write of 32 bit float files, etc.