Re: [Audacity-devel] Support FXP presets on VST effects?

[Richard A. <ri...@au...>]

On Mon, 31 Mar 2014 12:30:29 +0200
Sven Giermann <gie...@fu...> wrote:
> have there been any discussions on that issue in the past?
Not that I know of.
> I'm currently playing around with applying Live effects on playback 
> using Jack and VSTHost on Windows. When I found a suitable setting
> for one or more VST effect plug-ins, I would like to apply them
> inside Audacity.
This sounds useful and reasonable.

> I found a handy function to achieve this, as most plugins are capable
> of storing their settings as a preset. This could be saved to and
> loaded from file as well.
> But unfortunately VSTHost uses standard VST program structures for
> this, as defined in VST SDK (vst2.x/vstfxstore.h, see attachment)
This immediately rings alarm bells. Audacity does not use the VST SDK
to load VST plugins, because the license of the SDK (which forbids
redistribution of the source code) is incompatible with the GPL (which
requires distribution of the source code). The VST support in Audacity
is implemented via the reverse engineered Vestige header - see
src/effects/VST/aeffectx.h in the Audacity source code.

Unless this provides suitable functions for accessing preset store/load
functionality, we can't add this to Audacity.

Richard