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zmix · 26th January 2010

Nice thread...

I've been dealing with latency issues in Logic since v3 or so. I have 48 analog chains in my system which contain my various channel insert and bus processing as well as parallel processing and ambience effects. I have written a plugin that allows me to compensate the latency to within 1/8th of a sample, which allows me to compensate the phase shift encountered with transformer coupled outboard gear in a parallel chain.

I can confirm that I/O inserts in an AUX are not compensated in LP 7 and 8 and that BUS and channel inserts are perfectly compensated when using my latency plugin.

My current mixer uses 32 busses and 32 aux channels driven from the bus outputs.

This allows me a lot of flexibility in mixing, but learning what works and what doesn't required a lot of trial and error. As has been mentioned before, it's important to create 'output' objects in the environment and to place them in 'solo safe' (*except* for the main output pair!) The bus channels do not need to be put in solo safe, but any aux which contains an effect like a delay or reverb should be in solo safe so that the effect can be heard when soloing. There is an issue with this particular thing that can be a bit frustrating: When grouping instruments to a bus (i.e. "drum bus") and soloing that bus or aux, the effects from the channel "send" pot will still be audible. There may be a more specific mute group assignment but I haven't discovered it (anyone else?).

I have found that I cannot insert more than one I/O in the main output channel without encountering a infinite delay loop (certainly it's a bug, probably a driver issue).

I have a question: Has anyone tested the latency, I/O, mute / safe issues in LP 9.1???

Thanks,

Chuck Zwicky

26th January 2010	#71
zmix Lives for gear Joined: Jan 2005 Location: NY, NY Posts: 671	Nice thread... I've been dealing with latency issues in Logic since v3 or so. I have 48 analog chains in my system which contain my various channel insert and bus processing as well as parallel processing and ambience effects. I have written a plugin that allows me to compensate the latency to within 1/8th of a sample, which allows me to compensate the phase shift encountered with transformer coupled outboard gear in a parallel chain. I can confirm that I/O inserts in an AUX are not compensated in LP 7 and 8 and that BUS and channel inserts are perfectly compensated when using my latency plugin. My current mixer uses 32 busses and 32 aux channels driven from the bus outputs. This allows me a lot of flexibility in mixing, but learning what works and what doesn't required a lot of trial and error. As has been mentioned before, it's important to create 'output' objects in the environment and to place them in 'solo safe' (except for the main output pair!) The bus channels do not need to be put in solo safe, but any aux which contains an effect like a delay or reverb should be in solo safe so that the effect can be heard when soloing. There is an issue with this particular thing that can be a bit frustrating: When grouping instruments to a bus (i.e. "drum bus") and soloing that bus or aux, the effects from the channel "send" pot will still be audible. There may be a more specific mute group assignment but I haven't discovered it (anyone else?). I have found that I cannot insert more than one I/O in the main output channel without encountering a infinite delay loop (certainly it's a bug, probably a driver issue). I have a question: Has anyone tested the latency, I/O, mute / safe issues in LP 9.1??? Thanks, Chuck Zwicky