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Old 09-14-2017, 05:51 AM   #12
MixR
Human being with feelings
 
Join Date: Jan 2017
Location: London
Posts: 328
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I have just checked Ableton Live. It works in the same way as Pro Tools does:

PDC is applied to *all* tracks in the arrangement. Furthermore, the delay is absolute and does not get rounded up to the nearest buffer size. In my case from above the extra latency caused was 16 samples.

In Reaper this would have gotten rounded up to the next block size. In my case 64 samples. However, the buffer size I will normally be running when I am mixing will be higher, at least 128, possibly more samples.

The problem is that if I insert more than one plug-in causing extra delay the added PDC will spiral: 3 plug-ins with 16 samples of delay will cause 384 samples of delay at 128 Block Size; 768 samples at 256 Block Size and 1536 samples at 512 Block Size and so on.

I suppose Reaper's audio engine is just working differently to that of other DAW's.
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