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VSTHost
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VSTHost

Here's a little demonstrational Windows program I started in 2002 in order to understand the inner workings of VST plugins - VSTHost.

VSTHost - click for larger view!

It's a VST-compatible host that's capable of:

bullet loading VST effects (aka "plugins")
bullet parameterizing / editing them
bullet sound output for VSTis
bullet MIDI-input and -output
bullet loading / saving .fxb / .fxp files
bullet I/O through either Windows MME or ASIO drivers
bullet Wave Player / Recorder
bullet MIDI Player

While the program started mainly as an aid in understanding and debugging VST plugins, it has evolved into a quite capable program by now which can be really helpful in a keyboard artist's Live setup.

Since questions do occur from time to time, I've created a discussion forum for them.

You can download the current version here (.zip file, 560K).
Current version: 1.44 - the usual tons of enhancements, bug fixes and internal changes
Attention: if you're upgrading from an earlier version, by all means read the documentation!

You can download the current documentation for VSTHost here (.pdf file, 1.7MB).

Here you can find some VSTHost add-ons that have been created by ToyleY.

new.gif (860 Byte) VSTHost Slavery Suite

It was just a little question in a forum... "Is there a way to route the output of vsthost to Kristal Audio engine? And without latency?" that triggered the addition of a slave mode to VSTHost. And since I got a rather bad taste of humor, it got the above title.

When started with the parameter /slave, VSTHost goes into Slave Mode and waits for a Master to control it. The first (and currently only) master is a VST(i) plugin that can be embedded into any VST Host program (even another instance of VSTHost), called Legree. It comes as an effect and as a VSTi, since there are hosts that accept only effects, hosts that only accept VSTis, and of course hosts that accept both.

You can download Legree here (.zip file, 85K).
Current version: 1.02

You can download the current documentation for the VSTHost Slavery Suite here (.pdf file, 171K).

Open Source Variant

Originally, I made VSTHost available including the complete source code. Since I had to find out that (parts of) it made their way into other people's programs, and that without even mentioning my contribution, the open source variant has been frozen. I continue to add bug fixes to the existing code base, but new features won't make their way into it any more. Starting with V1.16k, this program is released under the terms of the GNU Lesser GPL.

Anyway - the important part of the program is an implementation of a VST host in form of 2 classes:

CVSTHost

This implements the audio callback needed by an effect plugin as a neatly encapsulated VST host class. This is practically platform-independent code. The few platform-specific things are encapsulated in...

CEffect

This encapsulates a VST effect, as loaded by the VST host. This class isn't fully complete - since I don't have a Mac, I've only included the Windows code. If a kind MacIntosh programmer could fill out the few Mac-specific sections and send it to me it would be great and, of course, publicized here!

You can download the sources for V1.16m here (.zip file, 285K).
Current version: VST 2.4 rev2 + ASIO 2.0 support, ASIO Channel selection, bug fix from V1.19-1.43

I accept payment through PayPal!, the #1 online payment service! Since I've already been asked multiple times whether it's possible to donate for VSTHost, I've upgraded my PayPal-Account to make it possible. I don't insist on it... but, of course, it would be a pleasure for me :-)
Auch in Deutsch erhltlich!

Last update: 08/01/07



11/11/2007
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