Should the USB MIDI connection be made directly for less latency?

My main keyboard controller is a Roland RD700SX. It's currently connected via a Belkin 7 port USB hub. Do you think this introduces latency? Should it be connected directly to the Mac? Are there any connectivity issues that I'm not aware of? I'm not sure if the latency has always been there and now I'm just more sensitive to it (after a few years of producing) or if it's something that I've introduced to my system (in my endless studio-configuration reorganizations).

Back in the days where we had HUB's in computer networks, these things slowed the data flow down drastically. A HUB is directing only one data packet at a time, so if two ports are sending data, the HUB can redirect some data packets from one port, then from the second, back to the first one, and so on...
What I've learned from the guys here is that also USB isn't working in duplex (read and write at the same time), but as a serial device (read then write and vise verse); meaning that if you also have other periferials connected to your HUB (like an external hard drive), data going to these can hinder the data your MIDI controller is trying to send.
But of course the best way to find out what is causing the problem, is plugging your controller directly into your USB-port. If this works fine, then you try it alone through your HUB. If this again works fine, start pluging one item at a time into the HUB, seeing if any of these introduce the latency problem in Logic.

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Your only option at this point is to connect the device to a computer running iTunes so you can restore it.
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X-station usb midi connection problem

The main problem is this: My Novation X-station I recently purchased is hooked up via usb. In Audio Midi setup the x-station midi interface will become grayed out after waking from sleep or restarting the computer. If Logic is started it displays the X-station midi interface no longer exists or is no longer connected.
I had it working correctly for a day with even being able to control its synth in Logic by way of external instrument. If I reinstall the usb driver it will show up again and work but not always.
My setup: iMac Intel core 2 duo 2.0, fireface 400, midisport 2x2. X-station usb driver 1.2 and syth operating system 2.303.
Things I've tried: Installing all latest drivers and synth operating systems, erasing and reinstalling drivers, switching usb cables, restarting the computer, checked permissions. It is connected with external power.
Any help would be appreciated. Thanks
iMac core 2 duo 2.0 Mac OS X (10.4.5) X-station, Fireface 400, midisport 2x2

Did you try to upgrade novation driver for Mac :
http://www.novationmusic.com/downloads.asp?productid=1&type=1
Might help. because it could be the midi command is not compatible with intel mac or tiger os x
And here is some thread about IAC Driver:
http://forums.macnn.com/showthread.php?t=199768
And some information I gather :
This driver is built in to your Macintosh “Panther” Operating System (OSX 10.3 or above).
*To activate this driver, go to: Macintosh HD -> Applications -> Utilities -> Audio MIDI Setup.
*Click the “midi devices” tab.
*Double-click the IAC Driver. This should open the “IAC Driver Properties” window.
*Make sure the “Device is online” checkbox is checked.
*Click the “Apply” button and quit Audio MIDI Setup.
Hope this help.

My ipad is locked up with the screen showing the usb port connecting to itunes. I had not synched by ipad to my computer in a long time so yesterday it was downloading software upgrades for 5 hours. then the screen was locked up.

My ipad is locked up with the screen showing a picture of the usb port with an arrow to itunes.

Then connect your iPad to your computer and use iTunes to restore.

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How do I sync my iPhone 4
When I connect the USB nothing happens
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OSX 10.4.11

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It's not a button; it's a menu item, and pressing the Alt and S keys will reveal it.
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I need help setting Win7 Advanced attributes for the USB drive connected to my EA4500 router

I can drill down to the Permission Entry for [foldername] window for a folder on the USB drive. There I learn that user group Everyone does not have the Full Control permission box checked. When I check the box and then click Apply, I get an Error Applying Security window. If I click Continue there, I get a Windows Security window that says "Unable to save permission changes on [foldername]. Access is denied." with no way out but an OK button.
I have Administrative authority in Win7, but maybe I need to know some Unix voodoo to come to terms with my router-mounted drive. I put the drive on the router to make always available, and I'd like to get it to work. For example, I can't turn the archive bit off for any file or folder on that drive when it's mounted on the router. Not with ATTRIB -A and not with XCOPY /M.
Just to stuff it in my face, XCOPY /M returns a two-line error message for every sub-folder that exists in the target folder:
Access denied
Unable to create directory - foldername
Help! And thanks in advance.
:+)
Solved!
Go to Solution.

Bill Dennes,
(Solutions/Work-Arounds below this paragraph, but sets up some useful information.)
As for the Security tab, I'm unsure of exactly why it doesn't appear on the tab itself for folders; however, clicking "Advanced -> Change Permissions -> Edit" will display the permissions; although, this doesn't appear to be a part of the problem in a sense. Additionally, “Everyone” always only has read & execute and is also not a part of the issue. To go further with this, the only users that have delete permission are “0” and “root” and since we can delete, we “should” be logged in as one of them and as such have “Full Control.”
As for the drive type, I'm unsure of why it "changes" it from FAT32 to NTFS (probably something to do with how it handles permissions); however, this is also not a part of the issue.
I have a flash drive formatted to FAT32, albeit only a 4GB and on an EA6500 with secure sharing enabled, that it does these both to and "xcopy testfolder Y:\ /e /m" works on it when all files and folders have the A attribute; however, disabling secure sharing makes it fail.
I’ve looked further into this and there are three ways I know of, as of right now, to make copying files with the bat file work for you:
The first way is to enable secure sharing and map the drives using it, once that is done you won’t need to enter the password again and your script will work as you currently have it coded. Given you have no need for the secure sharing, but it’s a simple solution. This is also the only way to be able to modify any attributes, although the only ones I know of that it will accept are R and A.
The second way is to instead use ROBOCOPY with the options /e, /m, and /copy:dt.
For example: "robocopy testfolder Y:\ /e /m /copy:dt"
/e = Copy subdirectories, including empty ones. (or use /S which will not copy empty folders)
/m = Copy only files with the Archive attribute and reset it.
/copy:dt = Copy data and timestamps, does not copy attributes, security, owner info, or auditing info.
The only important option to use is /copy:dt, the others can be replaced with whatever you need. Note that things like Song Author will still get copied as they are a part of the data section. I don’t believe XCOPY supports doing this, and in either case robocopy is a better solution that comes with Windows Vista and up, and can be gotten for those below Vista.
The third way is to add a section to the script to remove attributes from all folders before using xcopy to copy to the NAS, or modify the section that is causing the folders to have the A attribute as xcopy will gladly still copy them with /E or /S enabled.
The issue seems to be that when secure sharing is off, the server refuses attribute changing of folders, which is what is causing XCOPY to fail, as I suspect it attempts to change the attributes on the folders. Similarly, using robocopy without /copy:dt will also fail but gives you “Error 5 … changing file attributes [folder/path] Access is denied”. This is why I suspect that when XCOPY says “unable to create directory” that it is actually trying to change the attributes of the directory. Furthermore, it seems that the reason this works while secure sharing is on is that while it is on, the server pretends to accept the attributes but in reality ignores all attributes besides R. The server then adds the A attribute to all files put onto it, which you can only modify when secure sharing is enabled for some reason. The exception to this is that in either case, any file with the “H” (hidden) attribute, will not be copied, even if explicitly told to copy it. (This is true for both robocopy and xcopy; you also cannot manually add it afterwards.)
Is there an issue with the files on the NAS having the A attribute? If so the only way I currently know of to get rid of it is to enable secure sharing and have the script remove the attribute after copying. For example, when you look at the permissions, the user "0" and “root” have full control as I've previously stated. You can tell Windows to specifically use one of them when mapping the drive, which in turn should give you full control; however, the server still refuses modifying attributes without secure sharing on for some strange unknown reason. Although, I am no "UNIX gearhead," so there may in fact be another way that I do not know of. The only time they are not listed as “Full Control” on my end is when a file was previously marked Read-Only, in which case they all share the same limited control. When I said in the beginning that the permissions are not a part of the problem in a sense, it’s more of that for the general case of what you need to do, they aren’t the problem as long as you don't need the R attribute and having the A isn't an issue, as it seems to be more of the server is refusing attributes even though we should have permission; however, they do appear to be a bit weird and are possibly displaying incorrect when secure sharing is disabled.
I'd like to apologize in advance for any unclear, weirdly stated, or just plain odd things said in this post as I was pulled away to do a bunch of things and ended up editing, adding things, and finishing it late into the night and hope that one of the above is an acceptable resolution to your issue.

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[N86] Vibracall disabled when the usb is connected

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Should the USB MIDI connection be made directly for less latency?

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