One M-Tron Pro instance slow to load

[dannym]

Can anyone shed any light on what might cause an instance of M-Tron Pro to load slowly when opening a session? The plugin is *not* configured to load entire bank. Multi-processor support is set to Enabled (Compatibility Mode). I'm using a separate rack for each plugin.

You can see from the Cantabile log below that it took 23 seconds on the "Loading bank parameters" for the second M-Tron instance. I have had it take up to a minute in the past. It's *not* sample loading that's taking the time: M-Tron displays a popup when loading samples. That takes one or two seconds and appears to happen before the long pause.

I tried to replicate in a new session in which I created four instance of M-Tron Pro, but didn't get the same issue.

Any insights appreciated!

LOG FILE EXTRACT:

22:53:06 [2456:2]: VST Plugin - Locating plugin 0x74766c56
22:53:06 [2456:2]: VST Plugin - Loading C:\Program Files\Vstplugins\AIR Music Technology\Velvet_x64.dll...
22:53:06 [2456:2]: VST Plugin- Velvet_x64 - Platform 8664
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Library loaded
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Entry point (main) succeeded
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Magic OK
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - effOpen OK
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Wants Events: 0
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Wants Midi: 1
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Sends Midi: 1
22:53:07 [2456:2]: VST Plugin- Velvet_x64 - Loading bank parameters
22:53:07 [2456:2]: VST Plugin - Locating plugin 0x67214d74
22:53:07 [2456:2]: VST Plugin - Loading C:\Program Files\Vstplugins\GForce\M-Tron Pro\M-Tron Pro.dll...
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Platform 8664
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Library loaded
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Entry point (main) succeeded
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Magic OK
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - effOpen OK
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Wants Events: 1
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Wants Midi: 1
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Sends Midi: 0
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Loading bank parameters
22:53:07 [2456:2]: VST Plugin - Locating plugin 0x67214d74
22:53:07 [2456:2]: VST Plugin - Loading C:\Program Files\Vstplugins\GForce\M-Tron Pro\M-Tron Pro.dll...
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Platform 8664
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Library loaded
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Entry point (main) succeeded
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Magic OK
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - effOpen OK
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Wants Events: 1
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Wants Midi: 1
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Sends Midi: 0
22:53:07 [2456:2]: VST Plugin- M-Tron Pro - Loading bank parameters
-- TOOK 23 SECONDS! --
22:53:30 [2456:2]: VST Plugin - Locating plugin 0x67214d74
22:53:30 [2456:2]: VST Plugin - Loading C:\Program Files\Vstplugins\GForce\M-Tron Pro\M-Tron Pro.dll...
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Platform 8664
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Library loaded
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Entry point (main) succeeded
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Magic OK
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - effOpen OK
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Wants Events: 1
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Wants Midi: 1
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Sends Midi: 0
22:53:30 [2456:2]: VST Plugin- M-Tron Pro - Loading bank parameters
22:53:31 [2456:2]: VST Plugin - Locating plugin 0x656d5642
22:53:31 [2456:2]: VST Plugin - Loading C:\Program Files (x86)\VSTPlugins\MVerb.dll...
22:53:31 [2456:2]: VST Plugin- MVerb - Platform 014c
22:53:31 [2456:2]: VST Plugin- MVerb - Loading JBridge proxy from C:\Program Files\JBridge\Proxy64.dll
22:53:31 [2456:2]: VST Plugin- MVerb - JBridge proxy loaded
22:53:31 [2456:2]: VST Plugin- MVerb - Library loaded
22:53:31 [2456:2]: VST Plugin- MVerb - Entry point (main) succeeded
22:53:31 [2456:2]: VST Plugin- MVerb - Magic OK
22:53:31 [2456:2]: VST Plugin- MVerb - effOpen OK
22:53:31 [2456:2]: VST Plugin- MVerb - Wants Events: 1
22:53:31 [2456:2]: VST Plugin- MVerb - Wants Midi: 1
22:53:31 [2456:2]: VST Plugin- MVerb - Sends Midi: 0
22:53:31 [2456:2]: VST Plugin- MVerb - Loading bank parameters
22:53:31 [2456:2]: VST Plugin - Locating plugin 0x67214d74

[ndurant]

I've seen something similar with M-Tron Pro hosted on the Muse Receptor, taking 30+ seconds to load, so I don't think it's necessarily related to Cantabile. You could try disabling multiprocessor support - could potentially be some kind of threading deadlock.

Neil