Logic and MTP AV issues

[DrFletch]

HI, I'm running Logic Pro 9.1.8 on a MacBook Pro Retina 15" 10.8.2 with a USB Timepiece MTP AV (firmware2.0.1)

 

When inputting midi using Logic's inbuilt sounds, all is fine but when I use external devices, when playing the keyboard, notes drop out, notes hang and I get random midi data, portamento, attack time, volume etc.

 

Have changed cables, rebooted and looked at logic prefs as much as I can but can't see anything wrong.

 

Any clues?

 

cheers

[Jordi Torres]

Welcome to Logic Pro Help, DrFletch!

 

Please take a minute to read our forum rules and add your Logic version and system info to your signature: Forum Rules - please READ THIS before posting (#5)

 

What keyboard are you using?

 

Could be something with the MOTU.

 

I suggest you do a test using the free MIDI Monitor utility to compare what comes out when you use an IAC driver bus instead of the MOTU. This will help you see where the problem with the random MIDI messages is originating.

 

J.

[DrFletch]

Thanks, I gave versions in original post but will add to my signature.

 

I'm using a Yamaha S90 XS (local control off)

 

Will test using MIDI monitor

[Jordi Torres]

I gave versions in original post but will add to my signature.

 

thanks for doing that! It helps.

 

I'm using a Yamaha S90 XS (local control off)

 

OK.

 

Will test using MIDI monitor

 

Cool, let us know what you find out.

 

J.

[DrFletch]

Ahh...MIDI monitor shows this... might have something to do with it....seemingly random AV Sync Port clock commands

11:37:12.383 To Port 1 Note On 1 G1 50

11:37:12.621 From MIDI Timepiece AV Sync Port Clock

11:37:12.836 From MIDI Timepiece AV Port 1 Note Off 1 G1 0

11:37:12.862 To Port 1 Note Off 1 G1 0

11:37:15.649 From MIDI Timepiece AV Sync Port Clock

11:37:18.677 From MIDI Timepiece AV Sync Port Clock

11:37:21.705 From MIDI Timepiece AV Sync Port Clock

11:37:24.733 From MIDI Timepiece AV Sync Port Clock

11:37:27.762 From MIDI Timepiece AV Sync Port Clock

11:37:30.790 From MIDI Timepiece AV Sync Port Clock

11:37:33.818 From MIDI Timepiece AV Sync Port Clock

 

Can't see how to disable

[Jordi Torres]

I don't see how the data being sent on the sync port should affect whatever you have connected to any of the other "normal" ports...

 

J.

[Jordi Torres]

I have checked it out here on my USB MTP AV, and as soon as I close Clockworks, the Sync Port stops sending data (the first pair of LEDs ..the "A" LEDs...stop blinking).

 

Still, I don't see how this can affect data on other ports.

 

J.

[DrFletch]

OK I've finally narrowed it down to a MTP AV problem. Seems that the MacBooc Pro Retina doesn't like it very much. A Midisport 2x2 works perfectly.

 

I wonder if it's a USB 3 issue (Retina's only have USB 3) and the MTP driver hasn't been updated for that. I notice the Midisport drivers go to 10.6.8

 

Ah well, at least I'm working now albeit with only two midi ports

 

thanks for thoughts, any further ones...appreciated

[Jordi Torres]

Even though I doubt the problem is related to the data sent through the sync port, did you manage to make those messages stop?

 

I assume you're using the latest driver for the MOTU..are you?

 

I wonder if it's a USB 3 issue (Retina's only have USB 3) and the MTP driver hasn't been updated for that.

 

Who knows, if you could test with a computer that has USB 2.0 ports that would clear it up.

 

J.