v01.yaml has .quiet=true to cause all button pushes to become releases

src/device/input/parse/v01/config.go

@@ -12,4 +12,5 @@ type config struct {
 	Players []struct {
 		Transformation transformation
 	}
+	Quiet bool
 }

src/device/input/parse/v01/testdata/v01.yaml

@@ -17,3 +17,4 @@ players:
     b: "2"
     x: "3"
     y: "4"
+quiet: false

src/device/input/parse/v01/v01.go

@@ -60,7 +60,13 @@ func (v01 *V01) Read() []button.Button {
 	}
 	v01.telemetry(msg)
 
-	return v01.transform(msg).buttons()
+	buttons := v01.transform(msg).buttons()
+	if v01.cfg.Quiet {
+		for i := range buttons {
+			buttons[i].Down = false
+		}
+	}
+	return buttons
 }
 
 func (v01 *V01) telemetry(msg message) {