Bug 1083 – MDA and some other VST effects only apply default settings, sliders interact and do not update value labels.

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Audacity 3.0.3 development began 19th April 2021

Audacity Bugzilla

Bug 1083 - MDA and some other VST effects only apply default settings, sliders interact and do not update value labels.


Summary:	MDA and some other VST effects only apply default settings, sliders interact ...

Status:	RESOLVED FIXED

Product:	Audacity
Classification:	Unclassified
Component:	VST
Version:	2.1.1
Hardware:	Other Windows 7

Importance:	P3 Repeatable
Assigned To:	Default Assignee for New Bugs

URL:
Keywords:

Depends on:
Blocks:
	Show dependency tree / graph

Reported:	2015-07-15 10:37 UTC by Gale Andrews
Modified:	2018-08-20 11:45 UTC (History)
CC List:	5 users (show)

See Also:
Steps To Reproduce:	1 Install the MDA VST's from http://mda.smartelectronix.com/ and stereoizer (attached - don't know its URL - it is not the same as other "stereoizer" VST's I found online) and the JS plugins ( http://web.archive.org/web/20130523203350/http://membres.multimania.fr/jeje1999/jspack.zip ) 2 Create some mono or stereo audio. 3 Open any MDA e.g. Delay or Vocinput (this requires stereo audio). 4 Move the sliders. Notice that the value labels on the right do not change and that the sliders interact with each other. As far as I can tell, only the default effect settings are ever applied.
Release Note:	See bug 665
First Git SHA:
Group:	---
Workaround:
Closed:	2018-08-20 00:00:00

Flags:	gale: Regression+ gale: Test‑OK‑Win+ gale: Test‑OK‑Mac+

Attachments
Stereoizer that has interacting sliders and non-updating value labels in 2.1.x but not 2.0.6 (28.39 KB, application/zip) 2015-07-19 15:20 UTC, Gale Andrews	Details
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Description Gale Andrews 2015-07-15 10:37:17 UTC

Regression on 2.0.6 in that this bug is not present there.

Comment 1 Gale Andrews 2015-07-19 15:20:21 UTC

Created attachment 606 [details]
Stereoizer that has interacting sliders and non-updating value labels in 2.1.x but not 2.0.6

Comment 2 Leland Lucius 2015-08-01 02:43:49 UTC

Fix committed in 0251dc5.

I'm pretty sure this is because the subject VSTs were built for a VST version prior to 2.0.  And the opcode used to check whether a parameter can be automated or not was added in VST version 2.

Comment 3 Gale Andrews 2017-02-17 20:28:09 UTC

Tried on Windows 10 with several MDA VST's and the attached Stereoizer, with graphical interface and not (which doesn't make any visible difference in the effect interface).  All seemed well - the sliders moved independently and the value label at right updated, both using mouse or using keyboard shortcuts. Saving and recalling a user preset worked. 

Tried a few MDA VST's on Sierra, also with good result as for Windows.