LV2 support for atom:Path type

[wholehalf]

Would it be possible to implement LV2 support for the atom:Path type parameter? I came across this issue when trying to use the 'midi file' LV2 plugin that comes bundled with Carla (https://github.com/falkTX/Carla]). If this parameter was supported, there would be an icon to open a popup 'open file' window, that would allow loading a midi file into the plugin, as is shown in the screenshot from Ardour. Right now in REAPER, this icon does not show up. I orginally thought it was an issue in Carla, so I originally opened an issue ticket on Github and I got the following reply from falkTX, Carla's developer:

"when using the midi file directly in reaper, the issue will be on reaper side.
it needs to support plugin parameters of atom:Path type.
I guess it does not do that right now."

(link: https://github.com/falkTX/Carla/issues/1398)

[Someone64]

Having the same issue here as well with the DIE Fluidsynth plugin (also maintained by falk). There’s no button that allows me to choose which sf2 file to use so the instrument is entirely unusable in REAPER for the same reason.

[ladron]

This is still an issue. It pops up generally with simple plugins that do not have a user interface.

For example, this convolver:

https://github.com/x42/convoLV2

which needs a path to the impulse response file.

Without a plugin GUI, the only way to have a user specify a file is by using an atom:Path parameter.

[reaper38]

I am using https://github.com/mikeoliphant/neural-amp-modeler-lv2 (Linux) but I have to use other DAWs since Reaper doesn't support atom:Path. Sign me up on the list of users hoping that Reaper will support it soon.

[Scottsdale]

Another +1. Seems this would also be helpful for accessibility with LV2 format plugs.

[rdtsc]

Yet another +1. Only some plugins are compiled for Linux and more for Mac, so it's imperative that the host have a fully supported back-end to not further exclude these OSes.
Omitting atom:Path is limiting Reaper adoption in *all* OSes. Thanks for the consideration.

[hmoller]

+1 on this

[nixx]

+1 Would be great to have this implemented! :-)

[audiojunkie]

I've been looking into the new Neuro-amp-modeler-lv2 plugin:

https://github.com/mikeoliphant/neural-amp-modeler-lv2

I've learned that we can't use this plug in without yucky workarounds.

It would be REALLY nice if this were supported!

EDIT: There are SO MANY Plugins that we Linux users can't use in Reaper because of this. Justin, Schwa, this is SO important! Linux users have a limited source of plugins as it is, and this one thing is preventing us from using so many more plugins that other DAWs are able to use, such as Ardour.

EDIT 2: Here's another post I made about this that has more detail:

https://forum.cockos.com/showthread.php?t=279210

Please, respond to this topic and explain why this shouldn't be a priority. Thank you!

[buscon]

+1 on this too!

[wholehalf]

Check the latest prerelease thread!
https://forum.cockos.com/showthread.php?t=279338

+ LV2: non-automatable patch parameter support including atom:Path filename selection [t=252480]

Many thanks!

[audiojunkie]

Very, very cool!!!

[ladron]

Originally Posted by wholehalf

Check the latest prerelease thread!
https://forum.cockos.com/showthread.php?t=279338

Many thanks!

I haven't been able to find a build with this working. I tried that prerelease build without success. We're up to version 6.80 in production now, and I don't see any mention of this in release notes.

[krahosk]

Originally Posted by sockmonkey72

v6.79+dev0522 - May 22 2023

• + LV2: non-automatable patch parameter support including atom:Path filename selection [t=252480]

Changelog - Pre-Releases

Thank you!

[ladron]

Originally Posted by ladron

I haven't been able to find a build with this working. I tried that prerelease build without success. We're up to version 6.80 in production now, and I don't see any mention of this in release notes.

Nevermind - I just didn't get the correct version from the prerelease list.

[hmoller]

It didn't make it to 6.80 but it's in new pre-release 6.80+ https://forum.cockos.com/showthread.php?t=279565

[chmaha]

Originally Posted by krahosk

Thank you!

Still no IR/file selector with certain x42 plugins such as https://x42-plugins.com/x42/x42-zconvolver:



vs



and in the non-preset version...



which is able to open up a file selector in Ardour (the green box) but is completely missing in REAPER:

[audiojunkie]

Patiently bumping for exposure and comments