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User profile for user: guuseikens
guuseikens Author
User level: Level 1
6 points

Logic Pro X keeps sending C0 notes to midi out when record is armed on a audio track

I have a annoying problem with Logic Pro X, which I bought a month ago. Here's al little scenario that describes the problem.


  • I disconnect my audio interface, so that Logic Pro has to rely on my MacBook Pro's internal audio. This way I exclude my RME-FF800 from being of any influence.
  • I start up the Midi Monitor tool, to analyse what comes out of Logic; MIDI-wise.
  • I start up Logic set up a small test project in Logic Pro X, that contains:

    1 audio track

  • There's little button on the audio track with a red-colored "R". This is the button to "arm" this track for recording audio.
  • I push the little "R" button, the R-character turns white, the button as a whole turns red. The button starts blinking.
  • From this moment on Logic starts sending MIDI messages ....... huh? Every second or so ... a low C.
  • In my regular studio setup this means that I hear a low repeated note coming out of my piano, every time I record audio. How annoying!!
  • By the way ... a Guitar/Bass track has the same problem. All the other track types (External midi, software instrument, drummer) don't have this problem.


Help is deeply appreciated, because it drives me crazy and if I can't fix this .... I think I have to return to my previous DAW-of-choice (Cubase 7.5).


😟


Here's the Midi Monitor output.


20:46:01.241 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:02.008 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:02.774 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:03.541 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:04.308 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:05.075 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:05.841 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:06.608 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:07.374 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:08.140 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:08.908 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:09.675 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:10.441 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:11.208 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:11.975 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:12.741 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:13.507 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:14.274 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:15.043 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:15.808 To MIDI Monitor (midi monitor) Note Off 2 C0 0

20:46:16.574 To MIDI Monitor (midi monitor) Note On 2 C0 127

20:46:17.341 To MIDI Monitor (midi monitor) Note Off 2 C0 0



Logic Pro X = version 10.0.6


Mac Book Pro = late 2008.


Model Name: MacBook Pro

Model Identifier: MacBookPro5,1

Processor Name: Intel Core 2 Duo

Processor Speed: 2,53 GHz

Number of Processors: 1

Total Number of Cores: 2

L2 Cache: 6 MB

Memory: 4 GB

Bus Speed: 1,07 GHz

Boot ROM Version: MBP51.007E.B06

SMC Version (system): 1.33f8


Mac OSX = 10.9.1


System Version: OS X 10.9.1 (13B42)

Kernel Version: Darwin 13.0.0

Boot Volume: Macintosh HD

Boot Mode: Normal

Secure Virtual Memory: Enabled

Logic Pro X, OS X Mavericks (10.9.1)

Posted on Feb 5, 2014 11:58 AM

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User profile for user: The Art Of Sound
The Art Of Sound
User level: Level 6
12,202 points

Posted on Feb 5, 2014 2:10 PM

The note is likely being sent out because of a Control Surface you have installed or used.... be it a hardware keyboard, controller or even an ipad controller app... such as Logic Remote or TouchOSC for example... or even an iOS software synth app that is sending midi over wireless....


So.. first make sure you have force quit any iPad/iPhone Logic/midi related apps and not just closed them..


Then if that doesn't fix things.. delete Logic's CS preferences... and Logic's own user preferences too...as described here..


Delete the user preferences

You can resolve many issues by restoring Logic Pro X back to its original settings. This will not impact your media files. To reset your Logic Pro X user preference settings to their original state, do the following:

  1. In the Finder, choose Go to Folder from the Go menu.
  2. Type ~/Library/Preferences in the "Go to the folder" field.
  3. Press the Go button.
  4. Remove the com.apple.logic10.plist file from the Preferences folder. Note that if you have programmed any custom key commands, this will reset them to the defaults. You may wish to export your custom key command as a preset before performing this step. See the Logic Pro X User Manual for details on how to do this. If you are having trouble with a control surface in Logic Pro X, then you may also wish to delete the com.apple.logic.pro.cs file from the preferences folder.
  5. If you have upgraded from an earlier version of Logic Pro, you should also remove~/Library/Preferences/Logic/com.apple.logic.pro.
  6. Restart the computer.


Do not forget to Quit Logic before doing this and then restart the Mac after doing this....

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3 replies
Question marked as Best reply
User profile for user: The Art Of Sound
The Art Of Sound
User level: Level 6
12,202 points

Feb 5, 2014 2:10 PM in response to guuseikens

The note is likely being sent out because of a Control Surface you have installed or used.... be it a hardware keyboard, controller or even an ipad controller app... such as Logic Remote or TouchOSC for example... or even an iOS software synth app that is sending midi over wireless....


So.. first make sure you have force quit any iPad/iPhone Logic/midi related apps and not just closed them..


Then if that doesn't fix things.. delete Logic's CS preferences... and Logic's own user preferences too...as described here..


Delete the user preferences

You can resolve many issues by restoring Logic Pro X back to its original settings. This will not impact your media files. To reset your Logic Pro X user preference settings to their original state, do the following:

  1. In the Finder, choose Go to Folder from the Go menu.
  2. Type ~/Library/Preferences in the "Go to the folder" field.
  3. Press the Go button.
  4. Remove the com.apple.logic10.plist file from the Preferences folder. Note that if you have programmed any custom key commands, this will reset them to the defaults. You may wish to export your custom key command as a preset before performing this step. See the Logic Pro X User Manual for details on how to do this. If you are having trouble with a control surface in Logic Pro X, then you may also wish to delete the com.apple.logic.pro.cs file from the preferences folder.
  5. If you have upgraded from an earlier version of Logic Pro, you should also remove~/Library/Preferences/Logic/com.apple.logic.pro.
  6. Restart the computer.


Do not forget to Quit Logic before doing this and then restart the Mac after doing this....

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Logic Pro X keeps sending C0 notes to midi out when record is armed on a audio track

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