# Modular idea and some VST/AU/RTAS questions **URL:** \ **Category:** Audio Plugins\ **Created:** [August 10, 2010, 6:45pm UTC](https://forum.juce.com/t/modular-idea-and-some-vst-au-rtas-questions/5551 "2010-08-10T18:45:05Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![williamk](https://avatars.discourse-cdn.com/v4/letter/w/90ced4/32.png) [@williamk](https://forum.juce.com/u/williamk)\ **Post date:** [August 10, 2010, 6:45pm UTC](https://forum.juce.com/t/modular-idea-and-some-vst-au-rtas-questions/5551/1 "2010-08-10T18:45:05Z")
Guys, I want to do the following: have on plugin which will be a LFO and another plugin which will be a filter. It could be in VST, AU or RTAS format. Them, I load both plugins inside my modular-plugin, and the LFO output can be selected to go to any of the Envelope parameters. The idea is to have the LFO process(), for example, 128 sample-frames. Them, get the LFO output and send to any of the Envelope parameters. Now, some questions. Can I input one plugin with a list of automation that is in sync with the sample-frames? If I create an AU MAC plugin, can it load and host MAC VST plugins with Juce? Or I can only host in a plugin what is the plugin format? Anything else I should be aware of? Thanks for any advice, as I’m still at the very early stages, and I’m pretty sure I’m doing something stupid already… :oops: 😑 ---
**Author:** ![otristan](https://avatars.discourse-cdn.com/v4/letter/o/f0a364/32.png) [@otristan](https://forum.juce.com/u/otristan)\ **Post date:** [August 11, 2010, 8:48am UTC](https://forum.juce.com/t/modular-idea-and-some-vst-au-rtas-questions/5551/2 "2010-08-11T08:48:27Z")
If you don’t plan to release each module as separate plug in I don’t see why it would be a good idea to constrain yourself to those plugin format especially as there is no concept of voice in those. Unless you plan to do a mono synth where you can use the audio output as a control signal I don’t think that’s a good idea. ---
**Author:** ![williamk](https://avatars.discourse-cdn.com/v4/letter/w/90ced4/32.png) [@williamk](https://forum.juce.com/u/williamk)\ **Post date:** [August 11, 2010, 12:02pm UTC](https://forum.juce.com/t/modular-idea-and-some-vst-au-rtas-questions/5551/3 "2010-08-11T12:02:37Z")
But to be honest I have no idea on how to make a cross-platform DLL module, so I though I could just use the Juce plugin format, which is easier for me to load and create. :oops: