I recently went back to a previous composition I'd done in order to re-render it. It loaded fine, but when I played it back, the entire piece slowed to a crawl and was stuttering horribly. After some troubleshooting, I discovered that it was the "Square Mod Synth" preset (which used the Impulse virtual instrument) that was causing the issue, but didn't realize until later why it was happening.
Originally, I'd composed the track in the 48K, 32 bit (Float), Stereo mode, but had since changed everything up to use the 192K, 32 bit (Float), Stereo setting. Thus, when I played it back in the new mode, it was lagging badly while rendering the sound in 192K. I tried all the other presets of the Impulse VST and they work just fine, so it was something specific to the "Square Mod Synth" configuration.
In the VST edit interface, I saw that the "Square Mod Synth" was based on the "Return of Bender" preset. After meticulously checking each setting, I discovered it was the "shape" setting in the LFO 1 region. If it is set to anything OTHER than "Sqr", it works fine. There is something with the "Sqr" setting in 192K mode that is causing the lag.
So, the simple question is...can this be fixed?
TJ Dover (aka TymmyD
)A/V Production Engineer/Parody Artist