diff --git a/html/rawaudio.html b/html/rawaudio.html
index b31f9b1..90e68b3 100644
--- a/html/rawaudio.html
+++ b/html/rawaudio.html
@@ -16,7 +16,7 @@
 			font-family: system-ui, Arial, Helvetica, sans-serif;
 		}
 
-		textarea, input[type="text"] {
+		textarea, input[type="text"], input[type="number"] {
 			box-sizing: border-box;
 			width: 100%;
 		}
@@ -37,26 +37,39 @@
 		button:hover {
 			background-color: #0b5ed7;
 		}
+
+		a.disabled > button {
+			background-color: #5a5a5a;
+			cursor: default;
+		}
 		</style>
 		<script>
-		let canvElem, canvCtx, dataElem, sepElem, removeDC, normalize, volElem, pitchElem, loopElem, data;
+		let canvElem, canvCtx, leftElem, rightElem, sepElem, removeDC, normalize, volElem, pitchElem, rateElem, loopElem, downloadElem, dataLeft, dataRight;
 
 		function setup() {
 			canvElem = document.getElementById("canvElem");
 			canvElem.width = canvElem.parentElement.clientWidth;
 			canvCtx = canvElem.getContext("2d", { alpha: false });
 
-			dataElem = document.getElementById("dataElem");
-			dataElem.addEventListener("input", updateStopAudio);
+			leftElem = document.getElementById("leftElem");
+			leftElem.addEventListener("input", updateWithBuffer);
+
+			rightElem = document.getElementById("rightElem");
+			rightElem.addEventListener("input", updateWithBuffer);
+
+			downloadElem = document.getElementById("download");
 
 			sepElem = document.getElementById("sepElem");
-			sepElem.addEventListener("input", updateStopAudio);
+			sepElem.addEventListener("input", updateWithBuffer);
 
 			removeDC = document.getElementById("removeDC");
-			removeDC.addEventListener("change", updateStopAudio);
+			removeDC.addEventListener("change", updateWithBuffer);
 
 			normalize = document.getElementById("normalize");
-			normalize.addEventListener("change", updateStopAudio);
+			normalize.addEventListener("change", updateWithBuffer);
+
+			rateElem = document.getElementById("sampleRate");
+			rateElem.addEventListener("change", updateWithBuffer)
 
 			const play = document.getElementById("play");
 			play.addEventListener("click", toggleAudio);
@@ -73,28 +86,138 @@
 			updateData();
 		}
 
-		function updateData() {
-			let numbers = [];
-			dataElem.value.split(sepElem.value).forEach((elem) => {
-				elem = elem.trim();
-				if (elem) numbers.push(parseFloat(elem));
+		function interleave(inputL, inputR) {
+			const length = inputL.length + inputR.length;
+			const result = new Float32Array(length);
+			let index = 0;
+			let inputIndex = 0;
+			while (index < length) {
+				result[index++] = inputL[inputIndex];
+				result[index++] = inputR[inputIndex];
+				inputIndex++;
+			}
+			return result;
+		}
+
+		function floatTo16Bit(output, offset, input) {
+			for (let i = 0; i < input.length; i++, offset += 2) {
+				const s = Math.max(-1, Math.min(1, input[i]));
+				output.setInt16(offset, s < 0 ? s * 0x8000 : s * 0x7FFF, true);
+			}
+		}
+
+		function floatTo32Bit(output, offset, input) {
+			for (let i = 0; i < input.length; i++, offset += 4) {
+				output.setFloat32(offset, input[i], true);
+			}
+		}
+
+		function writeString(view, offset, str) {
+			for (let i = 0; i < str.length; i++) {
+				view.setUint8(offset + i, str.charCodeAt(i));
+			}
+		}
+
+		function encodeWAV(samples, format, sampleRate, numChannels, bitDepth) {
+			const bytesPerSample = bitDepth / 8;
+			const blockAlign = numChannels * bytesPerSample;
+			const buffer = new ArrayBuffer(44 + samples.length * bytesPerSample);
+			const view = new DataView(buffer);
+			writeString(view, 0, "RIFF");
+			view.setUint32(4, 36 + samples.length * bytesPerSample, true);
+			writeString(view, 8, "WAVE");
+			writeString(view, 12, "fmt ");
+			view.setUint32(16, 16, true);
+			view.setUint16(20, format, true);
+			view.setUint16(22, numChannels, true);
+			view.setUint32(24, sampleRate, true);
+			view.setUint32(28, sampleRate * blockAlign, true);
+			view.setUint16(32, blockAlign, true);
+			view.setUint16(34, bitDepth, true);
+			writeString(view, 36, "data");
+			view.setUint32(40, samples.length * blockAlign, true);
+			if (format === 1) {
+				floatTo16Bit(view, 44, samples);
+			} else {
+				floatTo32Bit(view, 44, samples);
+			}
+			return view;
+		}
+
+		function bufferToFile(name, buffer, float32) {
+			let interleaved;
+			const numChannels = Math.min(buffer.numberOfChannels, 2);
+			if (numChannels === 2) {
+				interleaved = interleave(buffer.getChannelData(0), buffer.getChannelData(1));
+			} else {
+				interleaved = buffer.getChannelData(0);
+			}
+			const view = encodeWAV(interleaved, float32 ? 3 : 1, buffer.sampleRate, numChannels, float32 ? 32 : 16);
+			return new File([view], name + ".wav", { type: "audio/wav" });
+		}
+
+		function readSamples(elem) {
+			let samples = [];
+			elem.value.split(sepElem.value).forEach((str) => {
+				str = str.trim();
+				if (str) {
+					const num = parseFloat(str);
+					if (isNaN(num)) {
+						window.alert(`Invalid number: ${str}`);
+						return;
+					}
+					samples.push(num);
+				}
 			});
-			data = new Float32Array(numbers);
+			return new Float32Array(samples);
+		}
+
+		function updateData() {
+			dataLeft = readSamples(leftElem);
+			dataRight = readSamples(rightElem);
+
+			const hasRight = dataRight.length > 0;
+			if (hasRight && dataLeft.length !== dataRight.length) {
+				window.alert(`Mismatching left and right channel lengths: ${dataLeft.length} and ${dataRight.length}`);
+				return;
+			}
 
 			if (removeDC.checked) {
-				let sum = 0;
-				data.forEach((val) => sum += val);
-				sum /= data.length;
-				for (let i = 0; i < data.length; ++i) {
-					data[i] -= sum;
+				// Calculate the DC offset
+				let DC = 0;
+				for (let i = 0; i < dataLeft.length; ++i) {
+					DC += dataLeft[i];
+					if (hasRight) {
+						DC += dataRight[i];
+					}
+				}
+				DC /= dataLeft.length + dataRight.length;
+
+				// Offset by the DC to normalize
+				for (let i = 0; i < dataLeft.length; ++i) {
+					dataLeft[i] -= DC;
+					if (hasRight) {
+						dataRight[i] -= DC;
+					}
 				}
 			}
 
 			if (normalize.checked) {
+				// Find the maximum sample
 				let max = 0;
-				data.forEach((val) => max = Math.max(Math.abs(val), max));
-				for (let i = 0; i < data.length; ++i) {
-					if (normalize.checked) data[i] /= max;
+				for (let i = 0; i < dataLeft.length; ++i) {
+					max = Math.max(Math.abs(dataLeft[i]), max);
+					if (hasRight) {
+						max = Math.max(Math.abs(dataRight[i]), max);
+					}
+				}
+
+				// Divide by the maximum to normalize
+				for (let i = 0; i < dataLeft.length; ++i) {
+					dataLeft[i] /= max;
+					if (hasRight) {
+						dataRight[i] /= max;
+					}
 				}
 			}
 			draw();
@@ -107,6 +230,16 @@
 			canvCtx.stroke();
 		}
 
+		function drawChannelData(data) {
+			canvCtx.beginPath();
+			for (let i = 0; i < data.length; ++i) {
+				const xPos = i / (data.length - 1) * canvElem.width;
+				const yPos = canvElem.height * 0.5 - data[i] * canvElem.height * 0.4;
+				canvCtx.lineTo(xPos, yPos);
+			}
+			canvCtx.stroke();
+		}
+
 		function draw() {
 			// Clear canvas
 			canvCtx.fillStyle = "black";
@@ -126,39 +259,40 @@
 			drawLine(0, yPos, canvElem.width, yPos);
 
 			canvCtx.strokeStyle = "white";
-			canvCtx.beginPath();
-			for (let i = 0; i < data.length; ++i) {
-				const xPos = i / (data.length - 1) * canvElem.width;
-				const yPos = canvElem.height * 0.5 - data[i] * canvElem.height * 0.4;
-				canvCtx.lineTo(xPos, yPos);
-			}
-			canvCtx.stroke();
+			if (dataLeft) drawChannelData(dataLeft);
+			if (dataRight) drawChannelData(dataRight);
 		}
 
-		let audioCtx, gainNode, bufferSource;
+		let audioCtx, gainNode, bufferSource, buffer, lastFile;
 
-		function setVolume() {
-			if (!gainNode) return;
-			const volume = parseFloat(volElem.value);
-			gainNode.gain.setValueAtTime(volume, audioCtx.currentTime);
+		function ensureContext() {
+			if (audioCtx) return;
+			audioCtx = new (window.AudioContext || window.webkitAudioContext)();
+			gainNode = audioCtx.createGain();
+			gainNode.connect(audioCtx.destination);
+			setVolume();
 		}
 
-		function setPitch() {
-			if (!bufferSource) return;
-			const pitch = parseFloat(pitchElem.value);
-			bufferSource.detune.setValueAtTime(pitch, audioCtx.currentTime);
-		}
+		function updateBuffer() {
+			const sampleRate = parseInt(rateElem.value, 10);
+			buffer = audioCtx.createBuffer(dataRight.length ? 2 : 1, dataLeft.length, sampleRate);
+			buffer.copyToChannel(dataLeft, 0);
+			if (dataRight.length) {
+				buffer.copyToChannel(dataRight, 1);
+			}
 
-		function toggleAudio() {
-			if (!audioCtx) {
-				audioCtx = new (window.AudioContext || window.webkitAudioContext)();
-				gainNode = audioCtx.createGain();
-				gainNode.connect(audioCtx.destination);
-				setVolume();
+			if (lastFile) {
+				window.URL.revokeObjectURL(lastFile);
 			}
+			lastFile = bufferToFile("audio", buffer, true);
+			downloadElem.href = window.URL.createObjectURL(lastFile);
+			downloadElem.download = "audio.wav";
+			downloadElem.classList.remove("disabled");
+		}
 
-			const buffer = audioCtx.createBuffer(1, data.length, audioCtx.sampleRate);
-			buffer.copyToChannel(data, 0);
+		function toggleAudio() {
+			ensureContext();
+			if (!buffer) updateBuffer();
 
 			if (bufferSource && bufferSource.loop) {
 				bufferSource.stop();
@@ -173,8 +307,23 @@
 			}
 		}
 
-		function updateStopAudio() {
+		function setVolume() {
+			if (!gainNode) return;
+			const volume = parseFloat(volElem.value);
+			gainNode.gain.setValueAtTime(volume, audioCtx.currentTime);
+		}
+
+		function setPitch() {
+			if (!bufferSource) return;
+			const pitch = parseFloat(pitchElem.value);
+			bufferSource.detune.setValueAtTime(pitch, audioCtx.currentTime);
+		}
+
+		function updateWithBuffer() {
 			updateData();
+			ensureContext();
+			updateBuffer();
+			
 			if (!bufferSource) return;
 			bufferSource.stop();
 			bufferSource = undefined;
@@ -183,10 +332,18 @@
 	</head>
 	<body onload="setup();">
 		<h1>Raw Audio Player</h1>
-		<div style="margin-bottom: 0.5rem;">
-			<label for="dataElem">Raw sample data</label>
-			<div>
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+				</div>
+			</div>
+			<div style="display: inline-block; width: 100%;">
+				<label for="rightElem">Right channel samples (optional)</label>
+				<div>
+				<textarea id="rightElem" rows="5"></textarea>
+				</div>
 			</div>
 		</div>
 		<div style="margin-bottom: 0.5rem;">
@@ -195,28 +352,37 @@ <h1>Raw Audio Player</h1>
 				<input id="sepElem" type="text" value=",">
 			</div>
 		</div>
+		<div style="margin-bottom: 0.5rem;">
+			<label for="sampleRate">Sample Rate (Hz)</label>
+			<div>
+				<input id="sampleRate" type="number" value="48000" min="1" step="1">
+			</div>
+		</div>
 		<div style="margin-bottom: 0.5rem;">
 			<input id="removeDC" type="checkbox" checked>
 			<label for="removeDC">Remove DC offset</label>
 			<input id="normalize" type="checkbox" checked>
 			<label for="normalize">Normalize</label>
+			<a id="download" class="disabled">
+				<button>Download WAV</button>
+			</a>
 		</div>
 		<canvas id="canvElem" width="512" height="256" style="margin-bottom: 0.5rem;"></canvas>
-		<div style="display: flex;">
+		<div style="display: flex; column-gap: 1rem;">
 			<div>
-			<button id="play">Toggle Audio</button>
+				<button id="play">Toggle Audio</button>
 				<div>
 					<input id="loop" type="checkbox" checked>
 					<label for="loop" checked>Loop</label>
 				</div>
 			</div>
-			<div style="margin-left: 1rem;">
+			<div>
 				<div>
 					<label for="volume">Volume</label>
 				</div>
 				<input id="volume" type="range" min="0" max="1" step="0.01" value="0.5">
 			</div>
-			<div style="margin-left: 1rem;">
+			<div>
 				<div>
 					<label for="pitch">Pitch</label>
 				</div>
@@ -224,4 +390,4 @@ <h1>Raw Audio Player</h1>
 			</div>
 		</div>
 	</body>
-</html>
+</html>
\ No newline at end of file