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External MIDI Recording Delays

Anyone know why I am getting delays or latency when recording using external MIDI synths ? I've tried adjusting I/O buffers, using low latency mode. Not sure I am looking in the right place but I've never heard of latency effecting MIDI recordings? Can anyone suggest anything? BTW aim using Logic Pro 8, w/Digi 002R/Rosetta 800 and a lot of external rackmount synths.

Logic Pro, Mac OS X (10.4.11)

Posted on Mar 9, 2013 8:58 AM

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26 replies

Mar 13, 2013 7:26 PM in response to The Art Of Sound

Ugggh !! Thanks anyway guys! I've been searching their site as well and no one has posted a solution. OMG! I really need confirmation that there's enough of a difference in MIDI sequencing between DP & Logic? Because its likely that Logic not work with MTPAVs which would mean buying 3 new 8 channel MIDI interfaces to the tune of at least $1,500 just to run Logic. Really don't want to go that route. It's amazing The support from Apple is so sparse on this. You guys and message boards like this are my only hope other than hiring someone directly. Incredible!

Mar 13, 2013 8:29 PM in response to Crazyhorsestudios

Yes, with Apple some things, (like support) are Pro in name only, in fact Apple support often recommends users come to this forums for answers.


re: Logic Pro help


If you post a question like "Dropped MIDI notes, using three MTPSV's"


You will get a response, there's two or three over there who know the Environment very well


I do have a question, in the pic you posted, where are you getting the names from, especially the specific names, is that from Audio-MIDI Setup?

Mar 13, 2013 8:37 PM in response to Crazyhorsestudios

Small consolation....but a ray of hope! I plugged the S90 keyboard into the DIGI-002R's MIDI port and was able to record flawlessly without delays, dropped notes or any other MIDI problems. I couldn't believe the MIDI actually worked so I tried recording another track and again worked like it's supposed to. After 3 weeks of painful troubleshooting its the 1st time I've seen Logic record MIDI without delays or problems. This doesn't solve the problem per se but does narrow down the problem to the MTPAV configuration or setting's. I think? So I still need to figure out what needs to be done to the 3 MTPAV's or done to Logic to allow MTPAV's to work with Logic. Not sure where to go now but will try that other site per your recommendation. Boy o Boy this had better be worth all the trouble! 🙂

Mar 13, 2013 8:44 PM in response to Pancenter

Yes the names are coming from the AMS setup. To me it looks like environments are created for them based AMS setup. I watched a few videos on creating environments and tried it and looks like most of the environments stuff somehow got created already. I just need to learn enough about environments,layers etc to confirm they were created correctly for the setup I have with 3 MTPAV's.

Mar 13, 2013 9:13 PM in response to Crazyhorsestudios

I setup my environment from scratch ages ago.


In the I have a multi-instrument for my SY77 keyboard, channels 1,2 & 3 are active the rest are disables as my two rackmount Korgs use channels 4,5 & 6 and 7,8 &9 respectively, these are all on MIDI interface port A (#1).

Channel 10 is an Alesis drum machine, channels 11-16 are reserved for whatever I might have at the time, mostly they're used on a QS8.


Each of these synths has it's own Multi-instrument, notice the settings used. Channels ALL, make sure the icon checkbox is enabled.


Port B (#2) of my MIDI interface has a similar setup with a Roland JV-1080 and a couple of other rackmounts.


All synths are wired into a MIDI switcher, and a Mixing board.



User uploaded file

Mar 14, 2013 11:45 AM in response to Pancenter

Yes DP uses AMS. I tried scrapping the AMS config and creating a new one last night. Didn't help. Also called MOTU This morning on alternate configurations for the MTPAV and they didn't have anything. They said they would try to recreate the problem and get back to me. Won't hold my breath.


Tried registering as a user on the www.logicprohelp.com forum but there seems to be a problem with their registration page. Couldn't get in last night or this morning. Emailed/left voicemail for them. Need to play the lotto with all this great luck.


In reviewing your comments on your environment I had questions for you.


- So you have things setup to only communicate on one channel per MIDI device?

- Instead of being able to use all 16 channels in Multitimbral mode?

- What is a MIDI switcher?

- Also I see you have your analog synths going to a mixer not directly to your DAW. Correct? That's how I have my setup. I see some folks prefer to route the synth directly to the DAW and monitor from there. Didn't know if they were try to accommodate some sort of latency issue.


Will keep you posted if I find solution to the Logic/MTPAV issue.

Mar 14, 2013 12:20 PM in response to Crazyhorsestudios

Crazyhorsestudios wrote:

In reviewing your comments on your environment I had questions for you.


- So you have things setup to only communicate on one channel per MIDI device?

- Instead of being able to use all 16 channels in Multitimbral mode?

- What is a MIDI switcher?

- Also I see you have your analog synths going to a mixer not directly to your DAW. Correct? That's how I have my setup. I see some folks prefer to route the synth directly to the DAW and monitor from there. Didn't know if they were try to accommodate some sort of latency issue.



I have a two port MOTU interface, 32 MIDI channels, 16 by 16.

What I've done is assigned 3 MIDI channels (1,2&3) from MIDI port 1 to my SY77 keyboard, channels 4,5&6 to Korg unit 1, channels 7,8&9 to Korg Unit 2, channel 10 to an Alesis drum machine, channels 11 through 16 are for various other MIDI devies, an old DX7 and a QS8. That only the 1st MIDI port and 16 channels.

I never use more than 3 parts on a multitimbrel so I only reserve 3 MIDI channels per device at most.


A MIDI switcher is basically a MIDI Patchbay.. mixing and matching various MIDI ins and outs, from the computer to any of the MIDI devices, it has programmable presets.


I only have 8 audio inputs so I really couldn't patch everything in. Some of my setup goes all the way back to 1985, I had an early MIDI/Audio setup and started doing work for PBS and NPR late 1986 through the 90's.

Mar 14, 2013 2:15 PM in response to Crazyhorsestudios

If I was troubleshooting this I would proceed as follows.


Cut down to one MIDI Timepiece and two or three external synths.

One of them a controller, or use a separate controller.


Nothing in AMS, just make sure the the MTP shows up threre, other than that leave AMS alone.


Start with a default project 16 MIDI tracks.


Create Environment Multi-Instrument Objects for each of the synths.


Assign separate MIDI ports to each of the Multi-instruments. Under MIDI Channels, set to ALL


Go to the arrange page and setup the tracks using the environment objects you've created. Be sure to set the port and MIDI channel you want to use, never use the ALL setting on the arrange page


Test the setup.

External MIDI Recording Delays

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