diff --git a/src/DummyAudioDriver.cpp b/src/DummyAudioDriver.cpp
index a03e034..de8a9dd 100644
--- a/src/DummyAudioDriver.cpp
+++ b/src/DummyAudioDriver.cpp
@@ -517,6 +517,8 @@ namespace pipedal
         result.sampleRates_.push_back(48000);
         result.minBufferSize_ = 16;
         result.maxBufferSize_ = 1024;
+		result.supportsCapture_ = true;
+        result.supportsPlayback_ = true;
         return result;
     }
     
diff --git a/src/PiPedalAlsa.cpp b/src/PiPedalAlsa.cpp
index af1be7e..b2f7f1a 100644
--- a/src/PiPedalAlsa.cpp
+++ b/src/PiPedalAlsa.cpp
@@ -97,20 +97,16 @@ std::vector<AlsaDeviceInfo> PiPedalAlsaDevices::GetAlsaDevices()
                 info.name_ = snd_ctl_card_info_get_name(alsaInfo);
                 info.longName_ = snd_ctl_card_info_get_longname(alsaInfo);
 
-                snd_pcm_t *hDevice = nullptr;
+                snd_pcm_t *captureDevice = nullptr;
+                snd_pcm_t *playbackDevice = nullptr;
+                bool captureOk = snd_pcm_open(&captureDevice, cardId.c_str(), SND_PCM_STREAM_CAPTURE, 0) == 0;
+                bool playbackOk = snd_pcm_open(&playbackDevice, cardId.c_str(), SND_PCM_STREAM_PLAYBACK, 0) == 0;
+                info.supportsCapture_ = captureOk;
+                info.supportsPlayback_ = playbackOk;
 
-                // must support capture AND playback
-                err = snd_pcm_open(&hDevice, cardId.c_str(), SND_PCM_STREAM_CAPTURE, 0);
-                if (err == 0)
-                {
-                    snd_pcm_close(hDevice);
-                }
-                if (err == 0)
-                {
-                    err = snd_pcm_open(&hDevice, cardId.c_str(), SND_PCM_STREAM_PLAYBACK, 0);
-                }
-                if (err == 0)
+                if (captureOk || playbackOk)
                 {
+					snd_pcm_t *hDevice = captureOk ? captureDevice : playbackDevice;
                     snd_pcm_hw_params_t *params = nullptr;
                     err = snd_pcm_hw_params_malloc(&params);
                     if (err == 0)
@@ -151,15 +147,25 @@ std::vector<AlsaDeviceInfo> PiPedalAlsaDevices::GetAlsaDevices()
 
                                 info.minBufferSize_ = (uint32_t)minBufferSize;
                                 info.maxBufferSize_ = (uint32_t)maxBufferSize;
-                                cacheDevice(info.name_, info);
-                                result.push_back(info);
                             }
                         }
                     }
                     if (params != nullptr)
                         snd_pcm_hw_params_free(params);
-                    snd_pcm_close(hDevice);
-                }
+                   if (captureOk)
+                        snd_pcm_close(captureDevice);
+                    if (playbackOk && playbackDevice != captureDevice)
+                        snd_pcm_close(playbackDevice);
+                    if (err == 0)
+                    {
+                        cacheDevice(info.name_, info);
+                        result.push_back(info);
+                    }
+                    else if (getCachedDevice(info.name_, &info))
+                    {
+                        result.push_back(info);
+                    }
+				}
                 else
                 {
                     if (getCachedDevice(info.name_, &info))
@@ -480,6 +486,8 @@ JSON_MAP_REFERENCE(AlsaDeviceInfo, longName)
 JSON_MAP_REFERENCE(AlsaDeviceInfo, sampleRates)
 JSON_MAP_REFERENCE(AlsaDeviceInfo, minBufferSize)
 JSON_MAP_REFERENCE(AlsaDeviceInfo, maxBufferSize)
+JSON_MAP_REFERENCE(AlsaDeviceInfo, supportsCapture)
+JSON_MAP_REFERENCE(AlsaDeviceInfo, supportsPlayback)
 JSON_MAP_END()
 
 JSON_MAP_BEGIN(AlsaMidiDeviceInfo)
diff --git a/src/PiPedalAlsa.hpp b/src/PiPedalAlsa.hpp
index cf602b2..5259837 100644
--- a/src/PiPedalAlsa.hpp
+++ b/src/PiPedalAlsa.hpp
@@ -31,6 +31,8 @@ namespace pipedal {
         std::string longName_;
         std::vector<uint32_t> sampleRates_;
         uint32_t minBufferSize_ = 0,maxBufferSize_ = 0;
+		bool supportsCapture_ = false;
+        bool supportsPlayback_ = false;
 
         bool isDummyDevice() const {
             return id_.starts_with("dummy:");
diff --git a/vite/src/pipedal/AlsaDeviceInfo.tsx b/vite/src/pipedal/AlsaDeviceInfo.tsx
index 0cd10ff..d1f97e0 100644
--- a/vite/src/pipedal/AlsaDeviceInfo.tsx
+++ b/vite/src/pipedal/AlsaDeviceInfo.tsx
@@ -9,6 +9,8 @@ export default class AlsaDeviceInfo {
         this.sampleRates = input.sampleRates as number[];
         this.minBufferSize = input.minBufferSize;
         this.maxBufferSize = input.maxBufferSize;
+		this.supportsCapture = input.supportsCapture ? true : false;
+        this.supportsPlayback = input.supportsPlayback ? true : false;
         return this;
     }
     static deserialize_array(input: any): AlsaDeviceInfo[]
@@ -62,5 +64,7 @@ export default class AlsaDeviceInfo {
     longName: string = "";
     sampleRates: number[] = [];
     minBufferSize: number = 0;
-    maxBufferSize: number = 0; 
+    maxBufferSize: number = 0;
+    supportsCapture: boolean = false;
+    supportsPlayback: boolean = false;
 };
\ No newline at end of file
diff --git a/vite/src/pipedal/JackServerSettingsDialog.tsx b/vite/src/pipedal/JackServerSettingsDialog.tsx
index c35a442..a295bb5 100644
--- a/vite/src/pipedal/JackServerSettingsDialog.tsx
+++ b/vite/src/pipedal/JackServerSettingsDialog.tsx
@@ -220,8 +220,8 @@ function isOkEnabled(jackServerSettings: JackServerSettings, alsaDevices?: AlsaD
 {
     if (!jackServerSettings.valid) return false;
     if (!alsaDevices) return false;
-	const inDevice = alsaDevices.find(d => d.id === jackServerSettings.alsaInputDevice);
-    const outDevice = alsaDevices.find(d => d.id === jackServerSettings.alsaOutputDevice);
+    const inDevice = alsaDevices.find(d => d.id === jackServerSettings.alsaInputDevice && d.supportsCapture);
+    const outDevice = alsaDevices.find(d => d.id === jackServerSettings.alsaOutputDevice && d.supportsPlayback);
     if (!inDevice || !outDevice) return false;
 
     const deviceBufferSize = jackServerSettings.bufferSize * jackServerSettings.numberOfBuffers;
@@ -289,15 +289,24 @@ const JackServerSettingsDialog = withStyles(
                 return result;
             }
 
-            let inDevice = alsaDevices.find(d => d.id === result.alsaInputDevice);
-            let outDevice = alsaDevices.find(d => d.id === result.alsaOutputDevice);
+            let inDevice = alsaDevices.find(d => d.id === result.alsaInputDevice && d.supportsCapture);
+            let outDevice = alsaDevices.find(d => d.id === result.alsaOutputDevice && d.supportsPlayback);
             if (!inDevice) {
-                inDevice = alsaDevices[0];
-                result.alsaInputDevice = inDevice.id;
+                inDevice = alsaDevices.find(d => d.supportsCapture);
+                if (inDevice) {
+                    result.alsaInputDevice = inDevice.id;
+                }
             }
             if (!outDevice) {
-                outDevice = alsaDevices[0];
-                result.alsaOutputDevice = outDevice.id;
+               outDevice = alsaDevices.find(d => d.supportsPlayback);
+                if (outDevice) {
+                    result.alsaOutputDevice = outDevice.id;
+                }
+            }
+
+            if (!inDevice || !outDevice) {
+                result.valid = false;
+                return result;
             }
             
 			if (result.sampleRate === 0) result.sampleRate = 48000;
@@ -467,9 +476,9 @@ const JackServerSettingsDialog = withStyles(
 						disabled={!this.state.alsaDevices || this.state.alsaDevices.length === 0}
 						style={{ width: 220 }}
 						>
-						{this.state.alsaDevices?.map(d => (
-								<MenuItem key={d.id} value={d.id}>{d.name}</MenuItem>
-						)) || <MenuItem value="" disabled>Loading...</MenuItem>}
+						 {this.state.alsaDevices?.filter(d => d.supportsCapture).map(d => (
+                                                                <MenuItem key={d.id} value={d.id}>{d.name}</MenuItem>
+                                                )) || <MenuItem value="" disabled>Loading...</MenuItem>}
 						</Select>
 						    </FormControl>
 
@@ -483,8 +492,8 @@ const JackServerSettingsDialog = withStyles(
 								disabled={!this.state.alsaDevices || this.state.alsaDevices.length === 0}
 								style={{ width: 220 }}
 								>
-								{this.state.alsaDevices?.map(d => (
-										<MenuItem key={d.id} value={d.id}>{d.name}</MenuItem>
+								{this.state.alsaDevices?.filter(d => d.supportsPlayback).map(d => (
+											   <MenuItem key={d.id} value={d.id}>{d.name}</MenuItem>
 								)) || <MenuItem value="" disabled>Loading...</MenuItem>}
 								 </Select>
                                                 </FormControl>