Does Emagic's AMT (Active Midi Transmission) work with Logic 8?

No - AMT was never ported to OSX, for the simple reason that time-stamping MIDI events is built into OSX - it's part of the Core MIDI specification.

The OS time stamps MIDI events in basically the same way as AMT, so you get the same tight timing - events fired to multiple ports will all go at the exact same time, rather than being sent sequentially. Logic does support this, though I'm not sure whether all MIDI apps do.

AMT was designed around the Windows/OS9 days, where OS support for MIDI was very limited.

hi bee jay, just a quick question as i see that u have the AMT 8.
i just updated to logic 8 and clean installed my whole machine, and all seemed to work fine except amt8 which isn't longer recognized.
i can't play the midi instruments thru amt in logic somehow. the connection between hardware synths and amt seems to be fine as all lights lighten when keyboard is hit. but no response from logic what so ever(in transport bar).
i tried to install drivers but it said not needed as i had the latest version.
have u experienced anything like this?
any help is much appereciated

Is your AMT8 shown in the Audio MIDI Setup utility?

it was shown before( as unitor 8 though) but not anymore.
rescan midi doesn't find anything more, i have a motu 896hd as audio interface, which appears now in the midi setup part as well.
amt is connected as before thru usb.
before i clean installed, i installed logic studio, which didnt work propperly(logic pro and waveburner didn't start, mainstage and soundtrack did).
at that stage, i was able to use my midi keyboard with mainstage with no problem.
is this a midi driver issue? cause i cant find anything about it on the net and read somewhere that AMT 8 is not compatible with logic pro, which is odd.
looking at your setting , it'd disclose the latter.

it was shown before( as unitor 8 though) but not anymore.

Ok, so it's not installed, and your computer doesn't know about it.

rescan midi doesn't find anything more,

No it won't. OSX can only communicate with an interface through a driver. No driver, no interface.

read somewhere that AMT 8 is not compatible with logic pro, which is odd.

Absolutely incorrect. And mine is working fine with all Logic versions, thank you very much! 🙂

Ok, trash you MIDI driver, which should be at:
/Library/Audio/MIDI Drivers/ EmagicUSBMIDIDriver.plugin

Also trash
/Users/ you*/Library/Preferences/ByHost/com.apple.MIDI.
/Users/ you/Library/Preferences/com.apple.audio.AudioMIDISetup.plist

Reboot. Reinstall the Emagic MIDI drivers from your Logic or GB installer. Reboot.

Check the AMT now shows up in the Audio MIDI Setup utility. If it does, you should be good to go.

Edit: Oh, before you do all that, check that the USB cable hasn't just fallen out..! 😉

Thanks a million Bee jay!
trashing the "/Users/ you*/Library/Preferences/ByHost/com.apple.MIDI. " did it. as well as the " /Library/Audio/MIDI Drivers/ EmagicUSBMIDIDriver.plugin "
which in my case was.../EmagicUSBMIDIDriver170.plugin

i also trashed everything midi(driver) related in receipts.

so let's see this thread as "double solved" 🙂

again, thanks very much and have a nice day bee jay!

Cool - good stuff! 😉

Bee Jay, you´re the man! It solved my problem too! Cheers from Germany

Thanks for the advise so far. My system does recognize the unit, BUT...

The unit seems to time out (stop receiving/transmitting) after a while. All of the controllers/keyboards connected to the AMT8 show no data in the transport window and fail to interact with Logic.

Does anyone else experience these hangs?

JG

BUMP...

No one?!

No-one, because you need to post your question as a new Topic. This one is already answered!

😉