[pitivi] docs: Add audio editing GSoC idea

[Alexandru Băluț <alexbalut src gnome org>]

commit 01464353a19efeb7c2930e3c224605bd6c38f1ff
Author: Alexandru Băluț <alexandru balut gmail com>
Date:   Mon Mar 8 22:13:07 2021 +0100

    docs: Add audio editing GSoC idea

 docs/GSoC_Ideas.md | 14 ++++++++++++++
 1 file changed, 14 insertions(+)
---
diff --git a/docs/GSoC_Ideas.md b/docs/GSoC_Ideas.md
index a7e12403e..611611a9e 100644
--- a/docs/GSoC_Ideas.md
+++ b/docs/GSoC_Ideas.md
@@ -110,3 +110,17 @@ GTK 4](https://developer.gnome.org/gtk4/unstable/gtk-migrating-3-to-4.html).
 
 **Requirements**: Python. Minimal experience contributing to Pitivi including
 unit tests. Experience developing GTK apps is a plus.
+
+
+## External audio editing integration
+
+The audio editing features in Pitivi are likely to stay at a basic level so we
+can focus on the video editing functionality. Once a video segment is finished,
+it would be great to be able to export the entire audio and work on it with an
+audio editor such as [Audacity](https://www.audacityteam.org). See for example
+how the experimental Blender-Audacity integration
+[works](https://www.youtube.com/watch?v=f61Zvb8AipA) and its
+[Python implementation](https://github.com/tin2tin/audacity_tools_for_blender).
+
+**Requirements**: Python. Minimal experience contributing to Pitivi including
+unit tests. Experience developing GTK apps is a plus.