Apple Logic Pro /LogicExpress Discussion

--- In Logic_Cafe@yahoogroups.com, "Peter Duemmler" <merlin@m...> wrote:
>
> The main difference in Logic´s TDM mixer is (despite the bus object not 
> having sends) that plug-in inserts on bus objects are post fader and on aux 
> objects pre fader.
> 
> Peter
> ---
> http://www.merlinsound.de

I can't verify your statement because I don't have TDM hardware. But when using Core 
Audio, a plugin insert is pre-fader on both Bus Objects and Aux Objects.

To test this, set an EQ with an analyzer in the insert slot. You will see the signal no matter 
what happens to the fader. This is true for both Bus Objects and Aux Objects.

To the best of my knowledge I have proven that the Bus Object is a "serial" object and the 
Aux Object is a "parallel" object. The following is how I conducted my test:

1. I sent a signal to Bus Channel "1" from an Instrument Object
and turned its output off.

2. I created one Bus Object, inserted a High Cut filter, and routed the
Object's output to No Output.

3. I created one Aux Object with Input set to Bus Channel "1" and
Output to the Output 1-2.

4. To test the relationship, I brought the frequency of the High Cut filter
down and noticed that as it it went all the way down, the signal pretty much
vanished at the Aux Object and therefore the Output 1-2. I could no longer
hear the signal even though the Aux Object volume was up and feeding from
that same Bus Channel.

5. To further test it, I removed the High Cut filter in that Bus Object. I
brought the Bus Object's fader  down and again, the signal vanished from the
Aux Object.

To me, that means the Bus Channel was effectively receiving the output of
that Bus Object even thought the Output was set to "No output".

6. Now I deleted the Bus Object (so there were no Bus Objects at all) and I
did the same test with two Aux Objects. 

These test results were different. The 2nd Aux Object still recieved the
pure, analtered, signal as it left the Instrument Object no matter what I
did to the first Aux Object. I tried changing the filter setting inserted
in that Aux Object. I lowered the fader. When I routed the Output of the
first Aux Object back to the same Bus Channel "1" the second Aux
Object then received the SUM of the unaltered Bus Channel signal and the
altered signal that was coming out of the first Aux Object.

This tells me that the Bus Object is a "serial object" and the Aux
Object is a "parallel object".

==
Troy