Rubberband Stereo Pitch Shifter can't transpose -3

[etienne]

Hi there

I am using Ardour 5.11.0 on Ubuntu 17.10, and I am trying to use the Rubberband Stereo Pitch Shifter (version 1.8.1).

I need to transpose down 3 semitones using this tool, but it refuses to let me. It will not tranpose -3, but -2 and -4 are no problem. There are also other transposing numbers that it refuses to do, such as -9 and a few others.

Can someone help me? Am I doing something wrong?

Thanks in advance.

[etienne]

This appears to be a bug in the Ardour GUI. The workaround is to right-click on the Rubberband plugin on the mixer channel, and then clicked Controls > Show all controls. I could do it from there.