FLS Checker plugin
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Re: FLS Checker plugin
Thanks, this plugin is very useful.
There are 3 approaches to fixing this issue:
1. Plugin vendors use dynamic linking and include the appropriate redist in their installers.
2. Cubase uses multiple processes to host plugins.
3. MS provides a workaround.
4. We all switch to Macs.
Even if every plugin vendor used dynamic linking and Cubase used no slots, we're still stuck with a limit.
Theoretically 128, but most likely around 64 to 100.
I'm getting tired of throwing high end hardware at an OS issue, perhaps option 4 might be the best approach.
There are 3 approaches to fixing this issue:
1. Plugin vendors use dynamic linking and include the appropriate redist in their installers.
2. Cubase uses multiple processes to host plugins.
3. MS provides a workaround.
4. We all switch to Macs.
Even if every plugin vendor used dynamic linking and Cubase used no slots, we're still stuck with a limit.
Theoretically 128, but most likely around 64 to 100.
I'm getting tired of throwing high end hardware at an OS issue, perhaps option 4 might be the best approach.
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USB: Virus TI2, Komplete Kontrol S88, Maschine Studio, OB-6, SUB 37, eLicenser, iLok
PCIe: UAD Octo
MIDI: Fantom X, Eventide Eclipse, other stuff.
Cubase Pro 10, Live 10 Suite.
Komplete 12 Ultimate+, iZotope, Powered Plugins, FabFilter, SoundToys, Waves Mercury+, Spectrasonics, Sylenth, Serum, D16, GForce, SynthMaster, Nexus, Valhalla, etc.
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Re: FLS Checker plugin
Slate Virtual Mix rack eats 36 slots.
can someone confirm same amount ?
can someone confirm same amount ?
Win10 x64;Core i5-4670;16GB RAM;SSD system HDD library;Nvidia 1050Ti 4GB
Cubase (always last update)
Cubase (always last update)
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Re: FLS Checker plugin
I tried latest version (2.0.3.4) and it showed me -2 slots for vst2 and vst3
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- matjones
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Re: FLS Checker plugin
Many thanks for the FLS Tool Takashi!Hemoglobin wrote: ↑Mon Apr 23, 2018 9:43 amI tried latest version (2.0.3.4) and it showed me -2 slots for vst2 and vst3
I'm finding just two slots for VMR vst2/3 also with the latest build.
This is kicking up some rather interesting results actually.... The new Arturia preamps are rather hungry too with 8 for The 1973 and 6 for both the TridA and V76 respectively.... Analogue Lab3 uses up a WHOPPING 45!!!!! think i feel a post coming on in the Arturia forum......

Ozone8 Maximiser uses 8 for vst2/3 which is also pretty hefty!
Cubase 10.0.40 Asus Z390-Plus, i9 9900 @ 3.7GHz, 64GB DDR4 3000Mhz RAM, Asus RX 570, RME Multiface II PCIe, SSL Alpha Channel, UAD2 Octo/Solo/Quad, UA6176, Pod X3 Pro, Slate VCC/VTM/Trigger etc, SoundToys 5, Waves 10, HALion 6, The Grand 3, BFD3 (+ Expansions), WL9.5, Melodyne Studio 4, Arturia VC7, Relab LX480, iZotope MPS, Eventide XI, Various toys, Telefunken, Neumann, AKG,Sontronics, Shure Mics, Adam A7X and Avantone monitors, AKG K702, ATH-M70x, Nektar P6, Warwick, Spector Basses, Gibson Les Paul Studio & loads of other junk.
Minds are like parachutes, they work best when they're open.
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- GargoyleStudio
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Re: FLS Checker plugin
I think the Analog Lab plugins versions 2 and 3 instantiate every single plugin instrument in the collection immediately when started, whereas the version 1 instantiates the instruments as they are required by the presets (and they're not released). That's why they take up so many slots.
Arturia definitely need a (polite but firm) hauling over the coals for being so greedy
Mike.
Arturia definitely need a (polite but firm) hauling over the coals for being so greedy

Mike.
[Win10x64 latest, Cb10.0 latest, MOTU PCIe, UAD2, Waves, Soundtoys, Arturia]
- matjones
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Re: FLS Checker plugin
Yes GargoyleStudio it would seem you're correct re AL & AL3.....GargoyleStudio wrote: ↑Wed May 09, 2018 5:37 pmI think the Analog Lab plugins versions 2 and 3 instantiate every single plugin instrument in the collection immediately when started, whereas the version 1 instantiates the instruments as they are required by the presets (and they're not released). That's why they take up so many slots.
Arturia definitely need a (polite but firm) hauling over the coals for being so greedy![]()
Mike.
Posted on the Arturia forum and got a fairly speedy and gracious reply from Ben... https://forum.arturia.com/index.php?top ... icseen#new if anyone else wants to contribute there too.
Some of the results i've been finding are quite surprising..... Spectrasonics Trilian only uses ONE FLS slot which was unexpected as it's a bit of a beast!
BFD3 only uses 2 and again it's a bit of a beast...
Cubase 10.0.40 Asus Z390-Plus, i9 9900 @ 3.7GHz, 64GB DDR4 3000Mhz RAM, Asus RX 570, RME Multiface II PCIe, SSL Alpha Channel, UAD2 Octo/Solo/Quad, UA6176, Pod X3 Pro, Slate VCC/VTM/Trigger etc, SoundToys 5, Waves 10, HALion 6, The Grand 3, BFD3 (+ Expansions), WL9.5, Melodyne Studio 4, Arturia VC7, Relab LX480, iZotope MPS, Eventide XI, Various toys, Telefunken, Neumann, AKG,Sontronics, Shure Mics, Adam A7X and Avantone monitors, AKG K702, ATH-M70x, Nektar P6, Warwick, Spector Basses, Gibson Les Paul Studio & loads of other junk.
Minds are like parachutes, they work best when they're open.
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- GargoyleStudio
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Re: FLS Checker plugin
Thanks for that @matjones, very interesting!! I'll be hoping that they can do something to help. I couldn't seem to log into the forum, is it different to the Arturia account login?? It doesn't seem obvious, there's no info...
Mike.
Mike.
[Win10x64 latest, Cb10.0 latest, MOTU PCIe, UAD2, Waves, Soundtoys, Arturia]
- greggybud
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Re: FLS Checker plugin
FWIW, Ben (I think he leads the beta test group) is the guy who handles Arturias bugs. I had many problems with Arturia "support" until he got involved, and within weeks they fixed a glaring sustain bug with the Prophet V. He is very active, hands on, and will work with you. Just communicate and don't drop the ball....
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Re: FLS Checker plugin
Question, so each of my hardware synths plugged in via usb would be using extra slots?
iMac Pro 8 core, 64GB ram, Vega 56, OS 10.14.6, Motu Microlite, Apollo 8, Motif MoxF6, more midi synths :)
- Fabio Bartolini
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Re: FLS Checker plugin
Not necessarily, but if they have integration (usually a dll in the Components or Shared Components folder of Cubase), yes they will.
The UR interfaces also use some slots.
Fabio Bartolini, Test Engineer
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- strummer
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Re: FLS Checker plugin
This is great, thank you Takashi!
Laptop Win 10, i7-4700MQ, 16 GB ram, SSD, Cubase pro 10, Steinberg UR824, 2 x Presonus Digimax D8, microphones:)
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Re: FLS Checker plugin
Ok then, thanks.. I only really use a plugin editor for my virus or novation, so they would just use normal slots like other plugins. I have a motif now too though so may use the plugin for that also. We'll see. Generally I use stand alone editors for my HW synths, or the ipad.Fabio Bartolini wrote: ↑Tue Jul 03, 2018 4:13 pmNot necessarily, but if they have integration (usually a dll in the Components or Shared Components folder of Cubase), yes they will.
The UR interfaces also use some slots.
I just hope there is some workaround some day, like cubase opening plugins in a new process once the limit is reached...
(basically, say, cubase could be designed to let the FLS slots max out, with a permanent slot counter shown somewhere in the info line, then when the limit is reached, all plugins from then on could open in a separate process, until the limit is reached again, and so on).
The whole reason I want such a powerful machine is cause i use a LOT of plugins and high track projects.. I know I will hit this FLS problem very very quickly if i switch to windows.. That's my main turn off at the moment.. well, that and forced windows 10 updates.
iMac Pro 8 core, 64GB ram, Vega 56, OS 10.14.6, Motu Microlite, Apollo 8, Motif MoxF6, more midi synths :)
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Re: FLS Checker plugin
fls checker is godsend. At least I know why my cubase projects began to behave weird and I know what to do about it..
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Re: FLS Checker plugin
Interesting i only had this problem in 8/8.5 and that seems to show whyswamptooth wrote: ↑Mon Mar 26, 2018 3:59 amThanks!
Checking cubase 7.5, 8.5 and 9.5 at launch...
this is what i get...
Windows 7
Award Modular BIOS v6.00PG
Intel i7 980 @3.33GHz (12 CPUs), ~3.4GHz
Memory - 48Gb
______________
Cubase 10
NVIDIA GeForce GTS 250
Focusrite Saffire Pro24
Casio Privia 330
Korg Microkey
Quested s8r
Award Modular BIOS v6.00PG
Intel i7 980 @3.33GHz (12 CPUs), ~3.4GHz
Memory - 48Gb
______________
Cubase 10
NVIDIA GeForce GTS 250
Focusrite Saffire Pro24
Casio Privia 330
Korg Microkey
Quested s8r
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Re: FLS Checker plugin
CP 9.5.40 no project, windows 7 pro, 99 free.
A 40 track project with Cakewalk Dimension Pro, Toontrack SuperiorDrummer2 and the rest Waves stuff - 96 free.
Expected to loose some more.
And thanks for the plugin, really good to get a grip where I am at.
A 40 track project with Cakewalk Dimension Pro, Toontrack SuperiorDrummer2 and the rest Waves stuff - 96 free.
Expected to loose some more.
And thanks for the plugin, really good to get a grip where I am at.

Windows 7 Pro - Intel i7-860 2.8GHz 16 GB - Cubase Pro 9.5 latest - RME HDSP 9632 + AI4S + Audient ASP 800 - Nvidia GT730
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Re: FLS Checker plugin
Analog Lab by Arturia - eats 40 slots!
can somene confirm ?
can somene confirm ?
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Re: FLS Checker plugin
Anything by Arturia was over 30 slots.
Can´t remember exactly, but yes, mine was around 36-40 slots
Can´t remember exactly, but yes, mine was around 36-40 slots
Format c:
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Re: FLS Checker plugin
Btw, UR44 eats 9 slots
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- Panther
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Re: FLS Checker plugin
Great news for Windows users...
HAPPY Healthy New Year all!
Psychlist1972 wrote:
Hi All
Good news! In the latest Windows Insider build, flighting today, we’ve increased the FLS slot limit to over 4000, from the 128 it is today. Although we really would prefer that plugin developers dynamically link the VC++ runtime (for bug fixes, security fixes, and just not loading duplicate code in memory), we recognize this was a blocking issue for you all, and so wanted to address it.
As part of this, we rewrote the code that handled the allocation to make it much easier to increase the limit in the future, when/if that is needed. All of this is implemented in the OS and is transparent to applications.
If all goes well and no issues are discovered during flighting, this will be in the next release of Windows 10 (19H1).
Announcing Windows 10 Insider Preview Build 18312 | Windows Experience Blog
If you test the FLS allocation on this insider build, please do report back your findings.
Pete
HAPPY Healthy New Year all!

Things are moving along nicely... if you're not in a hurry to get somewhere.
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- Psychlist1972
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Re: FLS Checker plugin
Hi All
If any of you test the new Insider build on your non-critical PCs, please feel free to contact me directly with results (or post them here, of course)
pete dot brown at microsoft dot com
Pete
If any of you test the new Insider build on your non-critical PCs, please feel free to contact me directly with results (or post them here, of course)
pete dot brown at microsoft dot com
Pete
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Re: FLS Checker plugin
my remarks first: Concerning Windows 10 64 bit Version 1809
FLS checker returned a max of 128 Slots on any configuration, it is hard coded now?
Next coming Windows Upgrade (19H1 release of Windows 10) should return many more slots ( > 4000)
- hope developer compiled new FLS checker version on Windows 10 64bit higher or equal Insider Build 18312
Anyway - my results on Windows 10 64bit 1803, 12 GByte Ram Intel Quadcore i7
Tested on "New Project" , Insert only one audio track stereo, then inserted FLS Checker Tools Plugin only
Cubase 10.0.10 Pro
94 Slots
Cubase 9.5.41 Pro
95 Slots
Cakewalk by Bandlab Version 2018.11 (Build 31, 64bit)
110 Slots
WaveLab 9.5.40 Pro
115 Slots
FLS checker returned a max of 128 Slots on any configuration, it is hard coded now?
Next coming Windows Upgrade (19H1 release of Windows 10) should return many more slots ( > 4000)
- hope developer compiled new FLS checker version on Windows 10 64bit higher or equal Insider Build 18312
Anyway - my results on Windows 10 64bit 1803, 12 GByte Ram Intel Quadcore i7
Tested on "New Project" , Insert only one audio track stereo, then inserted FLS Checker Tools Plugin only
Cubase 10.0.10 Pro
94 Slots
Cubase 9.5.41 Pro
95 Slots
Cakewalk by Bandlab Version 2018.11 (Build 31, 64bit)
110 Slots
WaveLab 9.5.40 Pro
115 Slots
„Ach, wissen Sie, im Grunde genommen ist die Sache ganz einfach. Es geht nur darum, die richtige Taste zum richtigen Zeitpunkt zu drücken. Das ist schon alles.“ J.S.Bach
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Steinberg: Cubase 10 Pro. Nuendo 10, Dorico 2, Halion 5/6, Halion Symphonic Orchestra, Groove Agent 5 , Grand 3. WaveLab Pro 9x
Hardware: Win 8.1 Pro ( + Win 10 Pro test system), UR28M,
Fremdtools: Cakewalk Sonar Platinum (lifetime update), Cakewalk BandLab, Presonus Studio One Pro 4+, Presonus Notion 6, Cantabile 3, Synthesizer > UVI Falcon, Waldorf Nave, Iris 2, AAS Strum/Analog/Chromaphone, Factory SugarBytes, Synthmaster, Fathom, Objeq Delay, BreakTweaker, MeldaProduction MSoundFactory. Mix/Mastering > iZotope Neutron Advanced, Ozone Advanced. Server Tools: VSL Ensemble Pro 7 including diverse VSL Synchron Libs
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Re: FLS Checker plugin
strange, now i have only 65-70 slots at start up cubase. normaly around 88-90
have no idea what can eat 19 sltos!
any solutions ?
have no idea what can eat 19 sltos!
any solutions ?
Win10 x64;Core i5-4670;16GB RAM;SSD system HDD library;Nvidia 1050Ti 4GB
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- Psychlist1972
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Re: FLS Checker plugin
Any loaded DLLs in the process can use up slots. It's possible there's an option enabled in Cubase, or you added a plugin, or an update to cubase or one of the loaded components/plugins uses more.
The 19H1 "May 2019 Update" release that ups the limit is coming late next month.
Pete
The 19H1 "May 2019 Update" release that ups the limit is coming late next month.
Pete
Pete Brown
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- Psychlist1972
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Re: FLS Checker plugin
(Also, yes, the FLS Checker plugin is hard-coded to max at 128. On a 19h1 system, it always reports 128, no matter how many plugins are loaded (unless you manage to hit the new super-high limit, that is)
Pete Brown
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Re: FLS Checker plugin
Thanks Pete, read your post before, cant wait to tested new update.Psychlist1972 wrote: ↑Thu Apr 11, 2019 3:53 amAny loaded DLLs in the process can use up slots. It's possible there's an option enabled in Cubase, or you added a plugin, or an update to cubase or one of the loaded components/plugins uses more.
The 19H1 "May 2019 Update" release that ups the limit is coming late next month.
Pete
you mentioned Option in Cubase, what it can be ?
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