[Ardour-Dev] No delay compensation for insert

Reuben Martin reuben.m at gmail.com
Thu Jun 23 16:47:45 PDT 2011

I ran into an issue today which, in the process of trying to work around it, turned up more issues... (Isn't that always the way it goes 

I have an insert in ardour that is causing a fair amount of delay, and the insert dialog seems to be able to measure the delay easily 
enough, but it is still off. I tried to insert the "artificial latency" plugin to work around it and found that it does not work. Which in turn 
makes me wonder, does ardour use that plugin to deal with delay compensation or does it roll its own delay internally? The LV2 
version of the same plugin is no better BTW.

I've run into issues in the past where the compiler optimization screws up dsp processing, so I rebuilt the swh plugins with only -O1, 
but it didn't change anything. (And the build fails when using -O0)

So then I tried to export the output from a sub-mix bus so that I could pull it back in and align it manually. But this is a rather long 
project (about 90min) and the export didn't complain or throw any errors, but after pulling the resulting wav file back in, it turns out 
it only contains the first 20 something minuites (or at exactly 5G for a stereo, 96k, 32bit float wav file) of the session.

So, 2 or 3 possibly unrelated issues except for the fact that they all have to do with my trying to keep the mix in sync.

This is with 2.8.11. Any help, suggestions or sympathy would all be appreciated. 

I build this all off of Gentoo, so if I can provide any build info, gdb traces, or anything else that might be useful let me know.


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