diff --git a/CHANGELOG.md b/CHANGELOG.md
index b94607c4..6a395b0a 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -30,7 +30,6 @@ In this document, Mod is Ctrl on Windows/Linux and Cmd on Mac.
 - Break Rack executable into libRack shared library and lightweight standalone Rack executable.
 - Add support for 1/2x and 1/4x low-fidelity sample rates to engine and "Engine > Sample rates" menu.
 - Add Escape key command for existing fullscreen, in case F11 doesn't work.
-- Allow RtAudio device block size to be as low as 16.
 - Copy cable color when cloning cables with Ctrl+click.
 - Fix key commands on AZERTY, Dvorak, and all other keyboard layouts.
 - Add Mouse device to Computer keyboard/mouse MIDI driver.
diff --git a/src/app/AudioWidget.cpp b/src/app/AudioWidget.cpp
index 1aa79cc5..0968ce4c 100644
--- a/src/app/AudioWidget.cpp
+++ b/src/app/AudioWidget.cpp
@@ -1,6 +1,7 @@
 #include <app/AudioWidget.hpp>
 #include <ui/MenuSeparator.hpp>
 #include <helpers.hpp>
+#include <set>
 
 
 namespace rack {
@@ -154,10 +155,16 @@ static void appendAudioSampleRateMenu(ui::Menu* menu, audio::Port* port) {
 		return;
 
 	std::vector<int> sampleRates = port->getSampleRates();
-	if (sampleRates.empty()) {
+	std::set<int> sampleRatesSet(sampleRates.begin(), sampleRates.end());
+	// Add current sample rate in case it's not in the list
+	sampleRatesSet.insert(port->getSampleRate());
+
+	if (sampleRatesSet.empty()) {
 		menu->addChild(createMenuLabel("(Locked by device)"));
 	}
-	for (int sampleRate : sampleRates) {
+	for (int sampleRate : sampleRatesSet) {
+		if (sampleRate <= 0)
+			continue;
 		AudioSampleRateValueItem* item = new AudioSampleRateValueItem;
 		item->port = port;
 		item->sampleRate = sampleRate;
@@ -214,10 +221,16 @@ static void appendAudioBlockSizeMenu(ui::Menu* menu, audio::Port* port) {
 		return;
 
 	std::vector<int> blockSizes = port->getBlockSizes();
-	if (blockSizes.empty()) {
+	std::set<int> blockSizesSet(blockSizes.begin(), blockSizes.end());
+	// Add current block size in case it's not in the list
+	blockSizesSet.insert(port->getBlockSize());
+
+	if (blockSizesSet.empty()) {
 		menu->addChild(createMenuLabel("(Locked by device)"));
 	}
-	for (int blockSize : blockSizes) {
+	for (int blockSize : blockSizesSet) {
+		if (blockSize <= 0)
+			continue;
 		AudioBlockSizeValueItem* item = new AudioBlockSizeValueItem;
 		item->port = port;
 		item->blockSize = blockSize;
diff --git a/src/rtaudio.cpp b/src/rtaudio.cpp
index 9eee8daa..57a4878f 100644
--- a/src/rtaudio.cpp
+++ b/src/rtaudio.cpp
@@ -161,7 +161,8 @@ struct RtAudioDevice : audio::Device {
 
 	std::vector<int> getBlockSizes() override {
 		std::vector<int> blockSizes;
-		for (int i = 4; i <= 12; i++) {
+		// 32 to 4096
+		for (int i = 5; i <= 12; i++) {
 			blockSizes.push_back(1 << i);
 		}
 		return blockSizes;