Bus V Aux

Hello everyone.
Okay, I know this question may perhaps have been addressed prior in the forum (if so, please point me in the proper direction), but although I myself have asked a slew of Aux/Bus questions on here (the vast majority of which have been adequately - if not exhaustively - answered) here's what may be a very, very simple Bus/Aux question that I HAVEN'T asked:
WHAT'S THE DIFFERENCE??
I never asked this question before because I think I was led to believe (or potentially just assumed) that they were the same thing. They do, afterall, seem to be interchangable, as I've been using Auxes the past few long months to route various channels into. However, and after going through the macpro video tutorials on Logic, I realize that there IS a difference - although I'm not completely sure exactly what it is.
I know/can see that Auxes have both ins and outs, while Buses only have outs - no ins . . .
Can someone give me a brief (or not so brief) explanation of the differences? Have I been horribly erred this entire time routing my tracks/channels into Auxes instead of Buses??
Thank you everyone, as always. Everyone on here has always been very helpful.
Javier Calderon

This is all very interesting. I rarely use busses, so the distinction between a buss and a buss object isn't something that crossed my mind before. Now I get it, and I'd like to elaborate a bit on this conversation...
It'san important thing to remember the concept of the "objects" in Logic. For example, if you see an output in the environment's audio layer, what you're really seeing is an audio object assigned to an output object. Since anything you see in the audio layer that has a fader and a pan pot is going to be an audio object, we can forget about the term "audio object" for now and concentrate on what kind of object it's assigned to. So when we see an output object in the environment/audio layer, we're seeing the visual representation of an output object. If we see a buss object, we see the visual representation of a buss object.
And as I've come to understand, it's important to distinguish between the buss and the buss object. They are not the same thing. Right. Forums. Cool!
The buss itself is just a pathway, a wire as jord put it. Funny thing is you can have no buss objects in the environment but the busses -- these pathways, or wires -- still exist. Of course, it doesn't make sense to send signal down a buss wire and not have that bussed signal show up anywhere. But it's entirely possible, and I think even educational towards explaining the distinction between buss and buss object. So... a lil' tutorial thingee...
Try this out: Add an audio track to the arrange on channel 1 (track 1), output 1/2.
Open the environment audio layer and arrange your objects so that you can see all of the following all the same time:
track 1 (channel 1)
buss 1
output 1
aux 1
Now, delete bus 1 from the environment. This is only temporary. (Oh and try not to do any other kind of editing in the meantime. This will make it easy to hit UNDO and get your bus back later).
Play your track. You'll see the meter on channel 1 and output 1/2. Simple enough.
Next, on channel 1, change the output to bus 1. The meters on output 1/2 will now go dead, as expected, because you've diverted the signal from output 1/2 to buss 1 (the wire, not the object). Notice also that even though you deleted the bus 1 object from your environment, the choice for bus 1 was not grayed out (unavailable). This proves the point that the buss -- the pathway/wire itself -- exists independent of the buss object. To prove the point, go to your aux object and assign its input to bus 1 and you'll now see level coming into this aux because you've now connected buss 1 to the input of that aux.
Switch the Aux's input back to "no input". And UNDO to get your buss back.

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Stero bus or aux for parallel compresion

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I use motu's 896 hd, worked out why my mono tracks were knocked out that was just an output setting. But still with my bus set to out 1-2 ect the input on my aux track is mono.....

Problem with doing bus to Aux/live rack unit sends

Hi all,
Just recently bought a compressor and a Spring Reverb... both rack units (not plug ins).... both with (1/4'') IO.
My plan was to do a Bs send to an Aux. that utilized the IO plug in (routing a send and return to one of my new units). There after, I was hoping I could use the Bus send on the audio source track to send to the Aux/effect and then have a blend of dry and effected signal overall.
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Why do you put the IO on both tracks? I would use it solely on the aux track.
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Basic Q, Routing all the audio tracks to a bus or aux channel strip ?

I'm a little confused on this issue.
I've been doing separate tracks for the sax solos and vocals using the best parts of several tracks with automation. I've been adding the same effect in each track separately and I know this is not good. I'd like to send all the sax tracks to an aux. strip with an effect and all the vocal tracks to another strip with a different effect but I'm just a little confused about it. I see in the Mixer you can add AUX channels but I'm not sure whether to use stereo or mono for this situation ? It seems like I should use stereo because many effects are stereo.

Sampleconstruct wrote:
Ok, select all your vocal tracks in your mixer->channels strips turn grey->now in the third box above the Channelstrip fader select the output to be e.g. Bus 1->Logic will automatically route Bus 1 to Aux 1 if you haven't created Busses in your environment before->insert your fx into the Aux->select all your Sax tracks->route them to Bus 2->insert your fx->done
I guess you shift select from the arrange window for multiple selections in the mixer but I just did them one at a time.
In this situation there appears to be no need to use the add AUX button. In the lower of the two I/O slots I selected Bus1 for the Sax and a new Aux1 track was created. For the Vocal I selected Bus2 and a new Aux2 was created.
---Thank you Sampleconstruct . I'm still in the dark but this was a huge help.

Bus and Aux and Guitar Rig 3

I am a little new to the whole idea of busing. I am getting Guitar Rig 3 and have read where I need to bus the audio to another track, as I record, to get the recorded effect. The track it is plugged into will get only a clean guitar sound recorded, and I need to bus the output to another track to get the effect recorded.
I read the manual and is it just as easy as selecting an output bus for a track and an AUX track just appears?
Any help would be great.
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RH

Guitar Rig shows up as an audio unit.
1. Create a new track.
2. Select that track.
3. Look at the leftmost column in the Logic window.
4. Right click on one of the buttons under the text that says "Inserts".
5. Guitar Rig is found under Audio Units->Native Instruments
Then double click the Guitar Rig button whenever you want to change a Guitar Rig setting. I believe that Logic does record the straight guitar track and applies Guitar Rig and any other effects on the fly.

Buses and Aux

I'm afraid this reveals my lack of recording understanding but here goes........ working in a 'new' Logic project, there are no 'buses' to start with so I presume you have to create a 'bus' so you send reverb chorus (whatever) to any channel. When you choose 'bus 1' as a 'send' you end up on the mixer with a new 'thing' called 'send 1 (aux 1).' I didn't ask for an aux - but I got one. - Well as you can see I'm totally confused (after recording for 10 years) I have survived this long by using templates. (and thus avoiding the environment)
At the most basic level, what is the difference between a bus, send, return and aux??????

Logic 7 and Logic 8 are very different in this area, and Logic 8 is far easier, IMO.
When you choose 'bus 1' as a 'send' you end up on the mixer with a new 'thing' called 'send 1 (aux 1).' I didn't ask for an aux - but I got one.
That's because Logic 8 wants you to use the new aux object (instead of the old bus object) and helpfully creates one for you when you activate a new bus, either by sending through a bus or routing a channel strip's output to a bus. You can rename the aux so that it shows up in your bus menu by name (reverb, delay, gtr.submix etc instead of Bus 1, Bus 2 etc) The aux object replaces the old bus object as it's more flexible, but the 'old' structure is still available in the environment to preserve compatibility with projects created in earlier Logic versions.
Here are a couple of threads that explain this in greater detail (there are many more -search the forum):
http://discussions.apple.com/thread.jspa?messageID=7444038&#7444038
http://discussions.apple.com/thread.jspa?messageID=3688943&#3688943
At the most basic level, what is the difference between a bus, send, return and aux??????
Overly simplified:
bus - think of a bus as a pipe that carries an assigned signal. A bit like the wiring in your house.
send - how much signal you want routed through the bus
return - the result of the processing applied to the bus signal routed through an aux
aux - an object that can be used in many different ways, but in this context a destination for the bus and ability to further route and be used by other objects, such as the mix bus. If the bus is your house wiring, the aux can be the wall socket.
Hope this helps.

How to display aux bus and Output 1-2 as tracks in arrange?

Sorry for the silly question but I would like to display the auxiliary busses and Out 1-2 as "tracks" in the Arrange view. They show in the Mixer as channel strips and, of course, they're in the Arrange Inspector but I would like to be able to see all my Busses and final Out at the same time. I've gone through the manual to no avail so it must be something really simple I'm missing. Can someone help me out?
Thanks.

Simplest method is to click on the 'Mixer' tab in your main arrange page. That should bring up the track mixer, then in the mixer tab's "Options" menu you'll find "create arrange tracks for selected channel strips".
Another method, which I'm actually kinda unhappy about, is that if you create any automation for a bus or aux chananel, it automatically creates an arrange track for the bus/aux. Doesn't seem like such a bad idea in itself, except that it totally messes with your track mixer display order. For example, I have all my subgroup bus strips together in my track mixer. But if I create some automation for one of'em, like the vocal bus for example, suddenly it's track strip jumps to somewhere else in the mixer. The only way I can keep bus tracks together is to create 'dummy' automation for all of'em - which is what I have to do.
I wish you could manually move the strips in the track mixer around to your preferred order, and choose to 'de-link' them from the arrange view. I've submitted this already to Apple's Black Hole. I mean, the 'Feedback' page...

Logic levels in bus etc.

Hi all!
When you assign a track to for instance a bus,an aux or an outputbus. The level drops 3db.
Lets say I send out a testtone from an instrument track at 12db under unity. The meter on output 1-2 shows 15 db under U. If I send the tone to bus 1 before the outputs the level drops even further to 18 db under U.
Does anybody know the reason for this? Is this somehow normal practice in mixerdesign? I don't remember to have noticed this before in any "real" console.
Cheers
Morten
Powermac G5 Dual1.8ghz Mac OS X (10.4.10)

It sounds like you're using stereo channels (iaudio instruments) with one of the -3dB pan laws, so when panned in the centre the signal is 3dB lower to compensate.
Change the pan law to what you want - if you want a 0dB pan law, then set it this way, and stereo signals will stay at 0dB in the centre (but sound louder than they do when hard panned.)

Aux track gives different library options to audio track

If i click on a "bus" or "aux" track and select settings in the inspector, i get a different set of preset options in the library that I do on an "audio" track.
I would like to be able to use audio track presets (vocals particularly) on a bus. Is this possible?

Hi
Click and Hold on the Settings button whilst holding down Option.
CCT

Logic bus output oddity.. Is my song corrupted or??

Ok so Im working on some remixes of my bands first lp..
This particular song Im working on, everythings great balance wise, but I wanna keep it so my peaks are around -3db..
Grabbed all my faders and dropped em accordingly, but noticed something odd with my tom tracks still being too loud..
I have 7 drum tracks, kick, snare, 3 toms, 2 overheads.. All of the drums, EXCEPT the toms are routed to a bus.
The toms go to their own bus for compression reasons, and that bus is then routed back into the bus the rest of the drums are going into.
So while I was trying to tame the toms, I muted the bus they are routed into..
I can still hear the toms hitting the main drum bus like they were going straight to that.
NOWHERE can I see anything odd in the mixer as far as routing.. All the rest of the drums go to Bus 1/Aux 1, while the toms get sent to Bus 7 (which feeds Aux 7) and the output of the Aux is set to Bus 1. I do have all the actual drum tracks using a Send to the reverb bus, but this isnt the reverb acting up..
If I mute Bus 7, those toms are still coming out loud and clear in Bus 1 only without the compressor thats inserted on Bus 7..
So what gives?? Did I miss something that might still be sending those toms to bus 1 first or does this sound like my actual song file has some corruption or some problems going on??
I still have the song open right now, and just for kicks went back in, soloed the drum bus. I put the three tom tracks outputs back to Bus 7, and that Aux channel actually has NOTHING set to input or output at the moment so those toms should be going nowhere out into space. But nope there they are clear as ever coming out of the drum bus still..
Oh yeah Im still on Pro 9.1.8 too since Im on a Mac Pro 1,1.. Running 10.7.5 but not sure that matters hehe..

OK so which Software Instrument do you use for your drums? Can you please put up a screenshot of your mixer with all the relevant auxes and tracks in frame?

Bus Automation Weirdness

Hi I sent all the drum tracks' outputs in a multitrack mix to Bus 10 so I could put insert fx across the whole kit.Bus 10 output was sent to the Stereo Bus.Logic also seemed to call Bus 10 (Aux 3) for some reason.
When I automated stuff on Bus 10 I looked for a newe track that woukld be called Bus 10 or Aux 3 but I couldn';t find it.
After a lot of lloking I eventually opened the mixer window ~(remember that!) and the Bus 10 strip wasnt where I expected but between tracks 22 and 23 and lo a behold in the arrange window there was a track there and it was called Tight U Hard Kit?? and that was where the automation data was.
Any clues as to why this happened and how to stop it?
best
tommy banana

Well in order to automate a track in must be places in the Arrange window. By control+clicking the Aux/Bus in the Mixer you can easily setup an Arrange track. If you don't want to see the Aux/Bus in the Arrange just use the "Hide" function available for every track in the Arrange to make it disappear.

How do you spread CPU load over more cores?

Hi
I recently bought a macbook pro quadcore i7 because my 2007 macbook couldn't cope with the demands of Logic when using it rewired with Ableton Live, and had lots of CPU overload messages.
I am really disappointed that having spent so much money to overcome this problem, it has only slightly improved the amount of overload messages. I read the article below about how to spread CPU power over the cores, now I have 8. I still can't figure out though how to control which channels are using which core and spreading the CPU load to cores 5-8 which don't seem to be being used. Any ideas?
Can I rewire from ableton to different cores?
In my project, the 2nd core keeps overloading whilst the others are down. Is it to do with aux channels, master channels, buses etc?
Or should I upload my memory to 8GB RAM?
Thanks
Steve
Here's the article:
About core activity
Logic breaks tasks down into threads that can be assigned to a single core for execution. It's not possible to split a single thread across multiple cores, although a single core may run multiple threads at the same time. This is one reason that you may sometimes see uneven load distributions across the available cores on your computer. If one thread is very processor-intensive, the core running that thread may show much more activity than the cores running less demanding tasks. This is the main reason that you may get "Core Audio Overload" warning messages even though some of the cores on your system may not show significant activity.
To monitor Logic as it uses the cores on your system, double-click the CPU meter in the Transport area.
A window displays a meter for each core.
The same concept applies to channel strips as well. Each channel strip—and all plug-ins it contains—is processed by one core. If you are using many processor-intensive plug-ins on a single channel strip, the core running it may show heavier activity. This is especially true if you are working at high sample rates (88.2 kHz or higher).
Redistributing core loads
If you find that a single core has much higher activity, use these strategies to redistribute the load.
In the example below, there is a single Software Instrument channel strip with plug-ins routed directly to Output 1-2. The channel strip for Output 1-2 has a large number of plug-ins.
In this example there is activity on two cores: the left core is handling the Software Instrument while the next core processes the Output 1-2 channel strip. You can use routing capabilities in Logic to distribute the load to more cores without changing the sound, as in the next image.
The resulting signal chain is Inst 1 > Aux 1 > Aux 2 > Out 1-2, as shown in this table:
Channel strip
Input
Output
Inst 1
Bus 1
Aux 1
Bus 1
Bus 2
Aux 2
Bus 2
Out 1-2
Also, the first four plug-ins have moved from Output 1-2 to Aux 1 and the remaining four plug-ins to Aux 2.
After adjusting the volumes to the respective channel strips appropriately, the result sounds identical, but now the load is distributed among four cores instead of two. You can use this concept to redistribute plug-ins from Audio channel strips, Software Instruments, Auxes, and Outputs (as in this example).
In the image above, there is still a very heavy load on a single core, even though it's using the routing described above. Notice the Inst 1 channel strip is selected. When a Software Instrument track is selected in the Arrange window, Logic enters "Live Input Mode". In this mode, Logic turns on every plug-in in the channel strip's signal path so the channel strip can be played live from a MIDI controller. All of this must be handled by a single thread and therefore just one core. It's a good idea to keep a track that uses an Audio channel strip selected in the Arrange window, unless you're actively playing or recording to a Software Instrument.

OS X Snow Leopard introduced Grand Central, where the OS will distribute the load better to more cores, however it takes time for software to adapt to these changes and make a rewrite of the codebase and test it out, Apple's included.

Can anyone tell me the how to use the "ducking" process in Logic Pro 8?

Howdy,
I've tried following the directions in the manual but I just can figure out the steps necessary to use the ducking process in Logic 8. For those who aren't sure what ducking is it's for instance, when you want a guitar track's volume to be reduced when a vocal track is active. As an example, there is a way to trigger the volume reduction in the guitar track(s) using a compressor in the vocal track. Whenever the singer is singing it automatically reduces the volume in the guitar track. I'm just not sure how to do this. Any help with the steps involved would be greatly appreciated.
Thanks,
Mark

Well, the theory is you run say, the mix , through the 'ducker' or as I like to call it, the 'motherducker', then you simply sidechain say, a kick drum. That is to say, you route your kick to a bus or aux channel, preferably routed to a different output, then assign that bus or aux as your sidechain input in the ducker. The theory is that the through signal will duck on receipt of the sidechained kick.
Frustratingly, this ducker is the buggiest thing since a bug landed on a buggy while loading it into the back of a VW bug. It just doesn't work. well it works for a bit and then stops working. Or the kick comes through the ducker as well. Or some other manifestation of complete crapness. Come on Apple, sort it out - it's the sound that everybody wants!
Sorry Mark L1

Problem with advanced sidechaining in logic x

probably best i explain what i'm trying to do first!
I'm bussing 4 different audio tracks to bus 1 (for example) which has eq / compressor etc and outputs to the master and also to bus 2
bus 2 has a drastic high cut on it but has no output, it is intended to be used as a silent sidechain effector
bus 3 has a compressor set to sidechain to bus 2, but instead of sidechaining to the high cut signal, it uses the dry one.
i used to route the same thing the same way on logic 8 and 9 but on 10 i have encountered this problem, is there a setting i need to change or is it a problem with the softwar that i'll have to add extra busses to route around?
thanks!

When you send (or change the output) of a channel to a bus, an Aux is created automatically in the mixer for you. You can create more Auxes manually and set their inputs to the same bus # if you need to. For example you could create a submix of 4 gtrs by setting the output to bus 1. In the mixer you will now have an Aux with bus 1 as its input. You could create 2 more Auxes with bus 1 as their input. So you have 3 channels all with the exact same submix of gtrs. Now you could do some parallel processing: 1 Aux has distortion, 1 Aux is clean, etc. Say you wanted to filter the crap out of the gtr submix and use it for a sidechain on something else, you take your third Aux and put your crazy filter on it, and change its output to Bus 2. A new Aux is created, but you can either delete it or change its output to none. Whatever you want to listen to the crazy filter in its sidechain listens to bus 2, where that filter has been sent (from the 3rd aux above).
I'm bussing 4 different audio tracks to bus 1 (for example) which has eq / compressor etc and outputs to the master and also to bus 2
Does the AUX output to Master & send to Bus 2? or is it bad grammar (not criticizing) and you mean the 4 audio tracks also go to Bus 2?
bus 2 (You mean an AUX with bus 2 as its input) has a drastic high cut on it but has no output, it is intended to be used as a silent sidechain effector
OK so far
bus 3 has a compressor set to sidechain to bus 2, but instead of sidechaining to the high cut signal, it uses the dry one.
I think what you want is to set the output of the AUX with the high cut to an open bus, and use that as the sidechain for whatever is on what "bus 3" is.
Maybe think of it like this: busses are pathways, they can even be potential pathways. If you send something to a bus it's like you plugged in a cord to a jack. The other end of that cord might not be plugged into anything. Or it might be plugged into the sidechain of a compressor, or an AUX channel. In Logic's virtual world, that cord is like a Y jack with, like, 250 ends on it. If you plug one of those ends into a filter, and one into an AUX channel, and one into a sidechain, the sidechain isn't going to hear what came from the filter. You need another cord (bus) to come out of the filter and then into the sidechain.
If you want to be 'clean and conservative' with your busses (and who doesn't in this economy?), you could skip the intermediate bus/channel. Unless the compression is critical to the silent sidechain signal, you could skip sending the compressed signal to bus 2. Change the input of the drastic high cut channel to Bus 1, and set its output to Bus 2, Make sure no AUXes are there with Bus 2 as their input.

Audio loopback function in Logic?

In attempting to answer another question a forum participant stated that Logic has a "loopback" function for audio such that the output of a standalone virtual instrument can be looped back into a Logic Bus or Aux channel without involvement of an audio interface or its software - - or any other software (such as SoundFlower or Jack OSX). Unfortunately he did not say exactly how to accomplish this. I would very much like to know if this is possible and, if it is, I would be most appreciative of a detailed description of how to accomplish it.
Thanks,
Steve

Still not clear:
How do I route the audio output of an external standalone host application to an Instrument or Audio track within Logic. The Vienna Ensemble's outputs are limited to the audio interface's channels, built-in audio or a bus I create within Vienna Ensemble. Vienna Ensemble - when used as a standalone - does not "see" Logic as a potential audio output object. It receives MIDI from Logic via the IAC bus.
Is there a way in which Logic can be made to see the Vienna Ensemble's audio outputs? Vienna Ensemble can also be used as a plugin - - something I already know how to do.
The advantage of using it as a standalone is that one can use it as a plugin and standalone or with multiple standalones simultaneously - - with each standalone having a separate memory partition and all these memory partitions separate from that inhabited by the plugin - - thus providing a way of exceeding the 3GB limit for loading samples imposed by 32-bit software. No doubt I am missing something.

Bus V Aux

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