From f2511bcb67d8f562617ee9fc5ce80a4f877dc9d3 Mon Sep 17 00:00:00 2001
From: AJR <ajrhacker@users.noreply.github.com>
Date: Thu, 25 Feb 2021 14:11:38 -0500
Subject: [PATCH] x1_010: Clamp output samples to within range

---
 src/devices/sound/x1_010.cpp | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/src/devices/sound/x1_010.cpp b/src/devices/sound/x1_010.cpp
index b54fa6bd6cf..4ad9993c120 100644
--- a/src/devices/sound/x1_010.cpp
+++ b/src/devices/sound/x1_010.cpp
@@ -215,13 +215,13 @@ void x1_010_device::sound_stream_update(sound_stream &stream, std::vector<read_s
 
 //  if (m_sound_enable == 0) return;
 
+	auto &bufL = outputs[0];
+	auto &bufR = outputs[1];
 	for (int ch = 0; ch < NUM_CHANNELS; ch++)
 	{
 		X1_010_CHANNEL *reg = (X1_010_CHANNEL *)&(m_reg[ch*sizeof(X1_010_CHANNEL)]);
 		if ((reg->status & 1) != 0)                            // Key On
 		{
-			auto &bufL = outputs[0];
-			auto &bufR = outputs[1];
 			const int div = (reg->status & 0x80) ? 1 : 0;
 			if ((reg->status & 2) == 0)                        // PCM sampling
 			{
@@ -295,4 +295,10 @@ void x1_010_device::sound_stream_update(sound_stream &stream, std::vector<read_s
 			}
 		}
 	}
+
+	for (int i = 0; i < bufL.samples(); i++)
+	{
+		bufL.put(i, std::clamp(bufL.getraw(i), -1.0f, 1.0f));
+		bufR.put(i, std::clamp(bufR.getraw(i), -1.0f, 1.0f));
+	}
 }