From 0270997acd9f164d0f828c3bc787a446d8e4f3dd Mon Sep 17 00:00:00 2001
From: Thomas Harte <thomas.harte@gmail.com>
Date: Tue, 12 Jul 2022 16:03:09 -0400
Subject: [PATCH] Add insurance against calls before setup.

---
 Outputs/Speaker/Implementation/LowpassSpeaker.hpp | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/Outputs/Speaker/Implementation/LowpassSpeaker.hpp b/Outputs/Speaker/Implementation/LowpassSpeaker.hpp
index 202c7f194..b225d2585 100644
--- a/Outputs/Speaker/Implementation/LowpassSpeaker.hpp
+++ b/Outputs/Speaker/Implementation/LowpassSpeaker.hpp
@@ -170,6 +170,10 @@ template <typename ConcreteT, bool is_stereo> class LowpassBase: public Speaker
 		}
 
 		inline void resample_input_buffer(int scale) {
+			if(output_buffer_.empty()) {
+				return;
+			}
+
 			if constexpr (is_stereo) {
 				output_buffer_[output_buffer_pointer_ + 0] = filter_->apply(input_buffer_.data(), 2);
 				output_buffer_[output_buffer_pointer_ + 1] = filter_->apply(input_buffer_.data() + 1, 2);