diff --git a/web/js/main.js b/web/js/main.js
index 9bb0b48..550cb48 100644
--- a/web/js/main.js
+++ b/web/js/main.js
@@ -181,7 +181,7 @@ function setLeftPoints(newPoints) {
 	$(".pointsLeft").text(newPoints);
 	$("#mPunkteLeft").val(newPoints);
 	if(sounds && (display || serverSound)) {
-		audio = new Audio('./sounds/zahlRichtig.mp3');
+		audio = new Audio('./sounds/zahlRichtig.ogg');
 		audio.play();
 	}
 }
@@ -190,14 +190,14 @@ function setRightPoints(newPoints) {
 	$(".pointsRight").text(newPoints);
 	$("#mPunkteRight").val(newPoints);
 	if(sounds && (display || serverSound)) {
-		audio = new Audio('./sounds/zahlRichtig.mp3');
+		audio = new Audio('./sounds/zahlRichtig.ogg');
 		audio.play();
 	}
 }
 
 function startAnswerFail() {
 	if(sounds && (display || serverSound)) {
-		answerFail = new Audio('./sounds/failFinal.mp3');
+		answerFail = new Audio('./sounds/failFinal.ogg');
 		answerFail.volume = answerFailVolume;
 		answerFail.play();
 	}
@@ -216,7 +216,7 @@ function startSchweinchen() {
 	$("#displayQuestions").hide();
 	
 	if(sounds && (display || serverSound)) {
-		schweinchen = new Audio('./sounds/schweinchen.wav');
+		schweinchen = new Audio('./sounds/schweinchen.ogg');
 		schweinchen.volume = schweinchenVolume;
 		schweinchen.play();
 	}
@@ -252,7 +252,7 @@ function showIntro() {
 	$(".noIntro").hide();
 	$(".intro").show();
 	if(sounds && (display || serverSound)) {
-		intro = new Audio('./sounds/intro.mp3');
+		intro = new Audio('./sounds/intro.ogg');
 		intro.volume = introVolume;
 		intro.play();
 	}
@@ -390,7 +390,7 @@ function setAnswer(index, answer) {
 		var el = $($("#answers").find(answer_select)[index]);
 		el.empty();
 		if(sounds && (display || serverSound)) {
-			audio = new Audio('./sounds/textRichtig.mp3');
+			audio = new Audio('./sounds/textRichtig.ogg');
 			audio.play();
 		}
 		el.typed({
@@ -413,7 +413,7 @@ function setAnz(index, nr) {
 		var el = $($("#answers").find(points_select)[index]);
 		el.text(nr);
 		if(sounds && (display || serverSound)) {
-			audio = new Audio('./sounds/zahlRichtig.mp3');
+			audio = new Audio('./sounds/zahlRichtig.ogg');
 			audio.play();
 		}
 		recalcSum(nr);
diff --git a/web/js/websocket.js b/web/js/websocket.js
index a2cbec0..bbbea07 100644
--- a/web/js/websocket.js
+++ b/web/js/websocket.js
@@ -95,7 +95,7 @@ var connectWs = function() {
 			if($(".marker"+value).css("color") == "rgb(127, 115, 115)") {
 				$(".marker"+value).css("color","rgb(211, 16, 16)");
 				if(sounds && (display || serverSound)) {
-					audio = new Audio('./sounds/fail.mp3');
+					audio = new Audio('./sounds/fail.ogg');
 					audio.play();
 				}
 			} else {
diff --git a/web/sounds/fail.mp3 b/web/sounds/fail.mp3
deleted file mode 100644
index 3951dd0..0000000
Binary files a/web/sounds/fail.mp3 and /dev/null differ
diff --git a/web/sounds/fail.ogg b/web/sounds/fail.ogg
new file mode 100644
index 0000000..5184b23
Binary files /dev/null and b/web/sounds/fail.ogg differ
diff --git a/web/sounds/failOrginal.mp3 b/web/sounds/failOrginal.mp3
deleted file mode 100644
index cd8e76a..0000000
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diff --git a/web/sounds/failOrginal.ogg b/web/sounds/failOrginal.ogg
new file mode 100644
index 0000000..30ebae3
Binary files /dev/null and b/web/sounds/failOrginal.ogg differ
diff --git a/web/sounds/fail_old.mp3 b/web/sounds/fail_old.mp3
deleted file mode 100644
index 4914c59..0000000
Binary files a/web/sounds/fail_old.mp3 and /dev/null differ
diff --git a/web/sounds/fail_old.ogg b/web/sounds/fail_old.ogg
new file mode 100644
index 0000000..e8e2461
Binary files /dev/null and b/web/sounds/fail_old.ogg differ
diff --git a/web/sounds/failfinal.mp3 b/web/sounds/failfinal.mp3
deleted file mode 100755
index cd8e76a..0000000
Binary files a/web/sounds/failfinal.mp3 and /dev/null differ
diff --git a/web/sounds/failfinal.ogg b/web/sounds/failfinal.ogg
new file mode 100644
index 0000000..09a10fc
Binary files /dev/null and b/web/sounds/failfinal.ogg differ
diff --git a/web/sounds/intro.mp3 b/web/sounds/intro.mp3
deleted file mode 100644
index 25ba0b8..0000000
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diff --git a/web/sounds/intro.ogg b/web/sounds/intro.ogg
new file mode 100644
index 0000000..fb1d036
Binary files /dev/null and b/web/sounds/intro.ogg differ
diff --git a/web/sounds/schweinchen.ogg b/web/sounds/schweinchen.ogg
new file mode 100644
index 0000000..0830e85
Binary files /dev/null and b/web/sounds/schweinchen.ogg differ
diff --git a/web/sounds/schweinchen.wav b/web/sounds/schweinchen.wav
deleted file mode 100644
index ef3ba53..0000000
Binary files a/web/sounds/schweinchen.wav and /dev/null differ
diff --git a/web/sounds/textRichtig.mp3 b/web/sounds/textRichtig.mp3
deleted file mode 100644
index ac8a13c..0000000
Binary files a/web/sounds/textRichtig.mp3 and /dev/null differ
diff --git a/web/sounds/textRichtig.ogg b/web/sounds/textRichtig.ogg
new file mode 100644
index 0000000..c97413e
Binary files /dev/null and b/web/sounds/textRichtig.ogg differ
diff --git a/web/sounds/zahlRichtig.mp3 b/web/sounds/zahlRichtig.mp3
deleted file mode 100644
index 11798f7..0000000
Binary files a/web/sounds/zahlRichtig.mp3 and /dev/null differ
diff --git a/web/sounds/zahlRichtig.ogg b/web/sounds/zahlRichtig.ogg
new file mode 100644
index 0000000..1c6e022
Binary files /dev/null and b/web/sounds/zahlRichtig.ogg differ