[5.92] Negative spikes in plugin automation envelope

[emcilveen]

Hey folks. I'm seeing some peculiar things happening with plugin automation.

Reaper 5.92/64
iMac (Mid 2011) running macOS 10.13.5

Steps:

- Create a new project
- Create a track
- Open Effects on the track, and insert an instance of ReaEQ
- Open Envelopes on the track and select Gain-High Shelf
- Shift-click to create an automation point somewhere on the timeline at 0 dB (i.e. where the envelope already is)
- Shift-click to create a second automation point, later in the timeline, at less than 0

A vertical spike will appear, as though there's an extra point in the envelope at -infinity. This happens when inserting a new point below 0dB or dragging a point or segment below 0. It's not always visible immediately, but will generally show up if you adjust the zoom level.

- Insert a piece of audio on the track

The spike is usually audible during playback.

- Render the project to a file

Often, you can often hear an unwanted ramp-up of the EQ at one of the automation points, even if there is no visible spike.

[emcilveen]

Reaper 6.11/64
iMac Retina 27-inch (Late 2014) running macOS Mojave 10.14.6

Hey all! I was re-outputting some older projects and discovered that this is still happening. Had to use a workaround (automating wet/dry mix instead of ReaEQ params) and re-render a number of big files.

Same steps as below, causing the same weird ramp of about 200ms or so. (That's using Full-speed Offline. An Online render has a much briefer artifact – a click instead of a long ramp – but it's still present.)

[Justin]

Hmm can you send your reaper.ini and a minimal project with steps of how you made it? email to support at cockos dot com. thanks!

[emcilveen]

On the way. Thanks for looking into it!

[Justin]

Thanks! There are two unrelated issues here:

1) There's a display glitch when drawing the envelope (it's just overdrawing that one pixel, no big deal, fixable)

2) ReaEQ has a glitch when turning certain types of filters on, we'll fix that.