1 files changed, 4 insertions, 0 deletions
diff --git a/src/synth/param.rs b/src/synth/param.rs
index ced5900..f679b56 100644
--- a/src/synth/param.rs
+++ b/src/synth/param.rs
@@ -1,5 +1,6 @@
 use super::*;
 
+#[derive(Debug)]
 pub struct Param {
     pub name: String,
     pub default: Sample,
@@ -11,4 +12,7 @@ impl Generator for Param {
         self.buf.set(*params.vars.get(&self.name).unwrap_or(&self.default));
         &self.buf
     }
+    fn set_buffer(&mut self, buf: SampleBuffer) -> SampleBuffer {
+        mem::replace(&mut self.buf, buf)
+    }
 }