ARTICLE

LADSPA support coming to Jokosher

by | Tue 25 Jul 2006

At LUGRadio Live we agreed an initial feature-set for Jokosher 0.2, and a release schedule. For more details on this, read [this this thread](https://mail.gnome.org/archives/jokosher-devel-list/2006-July/msg00135.html).

One of the key features I am keen to see in 0.2 is full LADSPA support. For those of you who have been living under a rock, LADSPA is a plug-in standard for audio effects. There are stacks of plug-ins out there, and we want them to work inside Jokosher. So, how does this work?

Well, there is a GStreamer bridge that worked with 0.8 and was ported to 0.10 and has problems. I have [reported this as a bug](https://bugzilla.gnome.org/show_bug.cgi?id=347676) and hopefully some of the GStreamer guys will fix this up soon. In the meantime, I figured I would write some code to get the plug-in UI up and running.

LADSPA does not actually provide a user interface for plug-ins. I *was* under the impression that some kind of XML UI description schema (similar to Glade) was available to describe the UI, but it seems not. Instead, you need to probe the LADSPA ports (the virtual knobs on the plug-in) and generate the interface yourself. I figured I would see if the GStreamer LADSPA bridge worked with regard to exposing these ports via GObject properties.

So, I wrote a test script today that queries the GStreamer plug-in registry for LADSPA plug-ins, and provides a list of them. When you select a plug-in, the script generates a settings window with a bunch of sliders and their appropriate minimum and maximum values. As such, the LADSPA querying and UI side of things is written and I can drop it into Jokosher. I plan on merging it in over the next few days. I hope to get LADSPA support finished for entire instruments over the following week, and when the bridge is fixed, we will have working effects support in Jokosher!! 🙂

An invitation-only accelerator that develops industry-leading community engagement and growth via personalized training, coaching, and accountability...all tailored to your company's needs.

Want to read some more?

Happy Holidays

Happy Holidays

Just a quick note to wish all of you a happy, restful, and peaceful holidays, however and whoever you spend it with. Take care, folks, and I look forward to seeing you in 2015!

The Impact of One Person

The Impact of One Person

I am 35 years old and *people* never cease to surprise me. My trip home from Los Angeles today was a good example of this. It was a tortuous affair that should have been a quick hop from LA to Oakland, popping on BArt, and then getting home for a cup of tea and an...

Feedback Requested: Great Examples of Community

Feedback Requested: Great Examples of Community

Folks, I need to ask for some help. Like many, I have some go-to examples of great communities. This includes Wikipedia, OpenStreetmap, Ubuntu, Debian, Linux, and others. Many of these are software related, many of them are Open Source. I would like to ask your...

Ubuntu Governance Reboot: Five Proposals

Ubuntu Governance Reboot: Five Proposals

Sorry, this is *long*, but hang in there. A little while back I wrote [a blog post](https://archivedblog.jonobacon.com/2014/11/14/ubuntu-governance-reboot/) that seemed to inspire some people and ruffle the feathers of some others. It was designed as a...

Ubuntu Governance: Reboot?

Ubuntu Governance: Reboot?

For many years Ubuntu has had a comprehensive governance structure. At the top of the tree are the Community Council (community policy) and the Technical Board (technical policy). Below those boards are sub-councils such as the IRC, Forum, and LoCo councils, and...

Dealing With Disrespect: The Video

Dealing With Disrespect: The Video

A while back I wrote and released a free e-book called [Dealing With Disrespect](https://www.dealingwithdisrespect.com/). It is a book that provides a short, simple to read, free guide for handling personalized, mean-spirited, disrespectful, and in some cases,...