From f13c70d028beac130278b857ca84493841fcc7a1 Mon Sep 17 00:00:00 2001
From: RSDuck <RSDuck@users.noreply.github.com>
Date: Tue, 1 Oct 2024 19:52:10 +0200
Subject: [PATCH] fix blow noise input (microphone input takes signed values)

---
 src/frontend/qt_sdl/EmuInstanceAudio.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/frontend/qt_sdl/EmuInstanceAudio.cpp b/src/frontend/qt_sdl/EmuInstanceAudio.cpp
index 21b112ea..a9bf1fb7 100644
--- a/src/frontend/qt_sdl/EmuInstanceAudio.cpp
+++ b/src/frontend/qt_sdl/EmuInstanceAudio.cpp
@@ -321,7 +321,7 @@ void EmuInstance::micProcess()
 
                 for (int i = 0; i < 735; i++)
                 {
-                    tmp[i] = mic_blow[sample_pos];
+                    tmp[i] = mic_blow[sample_pos] ^ 0x8000;
                     sample_pos++;
                     if (sample_pos >= sample_len) sample_pos = 0;
                 }