ladspa::HINT_SAMPLE_RATE

pub const HINT_SAMPLE_RATE: ControlHint = $ BitFlags {
bits : $ value }

Indicates that all values related to the port will be multiplied by the sample rate by the host before passing them to your plugin. This includes the lower and upper bounds. If you want an upper bound of 22050 with this property and a sample rate of 44100, set the upper bound to 0.5