diff --git a/CMakeLists.txt b/CMakeLists.txt
index aafa46b1c..a94321038 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -144,12 +144,18 @@ else()
     option(NEW_DYNAREC "Use the PCem v15 (\"new\") dynamic recompiler" OFF)
 endif()
 
-if((CMAKE_SYSTEM_NAME STREQUAL "NetBSD") OR (CMAKE_SYSTEM_NAME STREQUAL "OpenBSD"))
+if(CMAKE_SYSTEM_NAME STREQUAL "NetBSD")
     option(AUDIO4 "Use audio(4) as sound backend" ON)
 else()
     set(AUDIO4 OFF)
 endif()
 
+if(CMAKE_SYSTEM_NAME STREQUAL "OpenBSD")
+    option(SNDIO "Use sndio as sound backend" ON)
+else()
+    set(SNDIO OFF)
+endif()
+
 if(WIN32)
     set(QT ON)
     option(CPPTHREADS "C++11 threads" OFF)
diff --git a/src/sound/CMakeLists.txt b/src/sound/CMakeLists.txt
index 955e96f5a..0a04b0ff1 100644
--- a/src/sound/CMakeLists.txt
+++ b/src/sound/CMakeLists.txt
@@ -56,6 +56,21 @@ add_library(snd OBJECT
 # TODO: Should platform-specific audio driver be here?
 if(AUDIO4)
     target_sources(snd PRIVATE audio4.c)
+elseif(SNDIO)
+    target_sources(snd PRIVATE sndio.c)
+    find_package(PkgConfig REQUIRED)
+
+    pkg_check_modules(SNDIO IMPORTED_TARGET sndio)
+    if(SNDIO_FOUND)
+        target_link_libraries(86Box PkgConfig::SNDIO)
+    else()
+        find_path(SNDIO_INCLUDE_DIR NAMES "sndio.h")
+        find_library(SNDIO_LIBRARY sndio)
+
+        target_link_libraries(86Box ${SNDIO_LIBRARY})
+    endif()
+
+    include_directories(${SNDIO_INCLUDE_DIRS})
 elseif(OPENAL)
     if(VCPKG_TOOLCHAIN)
         find_package(OpenAL CONFIG REQUIRED)
diff --git a/src/sound/audio4.c b/src/sound/audio4.c
index 32989eecf..4e74d2c0c 100644
--- a/src/sound/audio4.c
+++ b/src/sound/audio4.c
@@ -66,8 +66,9 @@ void inital(void){
 #ifdef USE_NEW_API
 			AUDIO_INITPAR(&info[i]);
 			ioctl(audio[i], AUDIO_GETPAR, &info[i]);
-			info[i].pchan = 2;
+			info[i].sig = 1;
 			info[i].bits = 16;
+			info[i].pchan = 2;
 			info[i].bps = 2;
 			ioctl(audio[i], AUDIO_SETPAR, &info[i]);
 #else
diff --git a/src/sound/sndio.c b/src/sound/sndio.c
new file mode 100644
index 000000000..2fe1434df
--- /dev/null
+++ b/src/sound/sndio.c
@@ -0,0 +1,140 @@
+/*
+ * 86Box     A hypervisor and IBM PC system emulator that specializes in
+ *           running old operating systems and software designed for IBM
+ *           PC systems and compatibles from 1981 through fairly recent
+ *           system designs based on the PCI bus.
+ *
+ *           This file is part of the 86Box distribution.
+ *
+ *           Interface to sndio
+ *
+ *
+ * Authors:  Nishi
+ *
+ *           Copyright 2025 Nishi.
+ */
+#include <stdint.h>
+#include <unistd.h>
+#include <string.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <math.h>
+
+#include <sndio.h>
+
+#include <86box/86box.h>
+#include <86box/sound.h>
+#include <86box/plat_unused.h>
+
+#define I_NORMAL 0
+#define I_MUSIC 1
+#define I_WT 2
+#define I_CD 3
+#define I_MIDI 4
+
+static struct sio_hdl* audio[5] = {NULL, NULL, NULL, NULL, NULL};
+static struct sio_par info[5];
+static int freqs[5] = {SOUND_FREQ, MUSIC_FREQ, WT_FREQ, CD_FREQ, 0};
+
+void closeal(void){
+	int i;
+	for(i = 0; i < sizeof(audio) / sizeof(audio[0]); i++){
+		if(audio[i] != NULL){
+			sio_close(audio[i]);
+		}
+		audio[i] = NULL;
+	}
+}
+
+void inital(void){
+	int i;
+	for(i = 0; i < sizeof(audio) / sizeof(audio[0]); i++){
+		audio[i] = sio_open(SIO_DEVANY, SIO_PLAY, 0);
+		if(audio[i] != NULL){
+			int rate;
+			int max_frames;
+			sio_getpar(audio[i], &info[i]);
+			rate = info[i].rate;
+			max_frames = info[i].bufsz;
+			sio_initpar(&info[i]);
+			info[i].sig = 1;
+			info[i].bits = 16;
+			info[i].pchan = 2;
+			info[i].rate = rate;
+			info[i].appbufsz = max_frames;
+			sio_setpar(audio[i], &info[i]);
+			sio_getpar(audio[i], &info[i]);
+			if(!sio_start(audio[i])){
+				sio_close(audio[i]);
+				audio[i] = NULL;
+			}
+		}
+	}
+}
+
+void givealbuffer_common(const void *buf, const uint8_t src, const int size){
+	const int freq = freqs[src];
+	int16_t* output;
+	int output_size;
+	int16_t* conv;
+	int conv_size;
+	int i;
+        double gain;
+	int target_rate;
+	if(audio[src] == NULL) return;
+
+	gain = sound_muted ? 0.0 : pow(10.0, (double) sound_gain / 20.0);
+
+	if(sound_is_float){
+		float* input = (float*)buf;
+		conv_size = sizeof(int16_t) * size;
+		conv = malloc(conv_size);
+		for(i = 0; i < conv_size / sizeof(int16_t); i++){
+			conv[i] = 32767 * input[i];
+		}
+	}else{
+		conv_size = size * sizeof(int16_t);
+		conv = malloc(conv_size);
+		memcpy(conv, buf, conv_size);
+	}
+
+	target_rate = info[src].rate;
+
+	output_size = (double)conv_size * target_rate / freq;
+	output_size -= output_size % 4;
+	output = malloc(output_size);
+	
+	for(i = 0; i < output_size / sizeof(int16_t) / 2; i++){
+		int ind = i * freq / target_rate * 2;
+		output[i * 2 + 0] = conv[ind + 0] * gain;
+		output[i * 2 + 1] = conv[ind + 1] * gain;
+	}
+
+	sio_write(audio[src], output, output_size);
+
+	free(conv);
+	free(output);
+}
+
+void givealbuffer(const void *buf){
+	givealbuffer_common(buf, I_NORMAL, SOUNDBUFLEN << 1);
+}
+
+void givealbuffer_music(const void *buf){
+	givealbuffer_common(buf, I_MUSIC, MUSICBUFLEN << 1);
+}
+
+void givealbuffer_wt(const void *buf){
+	givealbuffer_common(buf, I_WT, WTBUFLEN << 1);
+}
+
+void givealbuffer_cd(const void *buf){
+	givealbuffer_common(buf, I_CD, CD_BUFLEN << 1);
+}
+void givealbuffer_midi(const void *buf, const uint32_t size){
+	givealbuffer_common(buf, I_MIDI, (int) size);
+}
+	
+void al_set_midi(const int freq, UNUSED(const int buf_size)){
+	freqs[I_MIDI] = freq;
+}