diff --git a/lib/Voicemeeter.psm1 b/lib/Voicemeeter.psm1
index d132c4e..4d5519f 100644
--- a/lib/Voicemeeter.psm1
+++ b/lib/Voicemeeter.psm1
@@ -20,11 +20,15 @@ class Remote {
     [String]$vmpath
     [Hashtable]$kind
     [Object]$profiles
+    [String]$userpath
+    [String]$workingconfig
 
     Remote ([String]$kindId) {
         $this.vmpath = Setup_DLL
         $this.kind = GetKind($kindId)
         $this.profiles = Get_Profiles($this.kind.name)
+        $this.userpath = Join-Path ([Environment]::GetFolderPath('MyDocuments')) 'Voicemeeter'
+        $this.workingconfig = Join-Path $this.userpath ('vm' + $this.kind.name + '_working.xml')
     }
 
     [string] ToString() {
diff --git a/lib/bus.ps1 b/lib/bus.ps1
index 38e32e4..787e950 100644
--- a/lib/bus.ps1
+++ b/lib/bus.ps1
@@ -97,7 +97,7 @@ class VirtualBus : Bus {
 }
 
 class BusDevice : IODevice {
-    BusDevice ([int]$index, [Object]$remote) : base ($index, $remote) {
+    BusDevice ([int]$index, [Object]$remote) : base ($index, $remote, 'Output') {
         if ($this.index -eq 0) {
             AddStringMembers -PARAMS @('asio') -WriteOnly
         }
diff --git a/lib/io.ps1 b/lib/io.ps1
index eebe18f..f767900 100644
--- a/lib/io.ps1
+++ b/lib/io.ps1
@@ -100,9 +100,57 @@ class EqCell : IRemote {
 }
 
 class IODevice : IRemote {
-    IODevice ([int]$index, [Object]$remote) : base ($index, $remote) {
+    [string]$kindOfDevice
+    
+    IODevice ([int]$index, [Object]$remote, [string]$kindOfDevice) : base ($index, $remote) {
+        $this.kindOfDevice = $kindOfDevice
+        
         AddStringMembers -WriteOnly -PARAMS @('wdm', 'ks', 'mme')
         AddStringMembers -ReadOnly -PARAMS @('name')
         AddIntMembers -ReadOnly -PARAMS @('sr')
     }
+
+    hidden $_driver = $($this | Add-Member ScriptProperty 'driver' `
+        {
+            $path = $this.remote.workingconfig
+            $oldTime = if (Test-Path $path) { (Get-Item $path).LastWriteTime } else { [DateTime]::MinValue }
+
+            $this.remote.Setter('Command.Save', $path)
+
+            $timeout = New-TimeSpan -Seconds 2
+            $sw = [Diagnostics.Stopwatch]::StartNew()
+            $line = $null
+            do {
+                if (Test-Path $path) {
+                    $newTime = (Get-Item $path).LastWriteTime
+                    if ($newTime -gt $oldTime) {
+                        try {
+                            $line = Get-Content $path | Select-String -Pattern "<$($this.kindOfDevice)Dev index='$($this.index + 1)'"
+                            if ($line) { break }
+                        }
+                        catch {}
+                    }
+                }
+                Start-Sleep -Milliseconds 20
+            } while ($sw.elapsed -lt $timeout)
+            
+            if (-not $line) { return 'unknown' }
+
+            $type = $null
+            if ($line.ToString() -match "type='(?<type>\d+)'") {
+                $type = $matches['type']
+            }
+
+            switch ($type) {
+                '1' { return 'mme' }
+                '4' { return 'wdm' }
+                '8' { return 'ks' }
+                '256' { return 'asio' }
+                default { return 'none' }
+            }
+        } `
+        {
+            Write-Warning ("ERROR: $($this.identifier()).driver is read only")
+        }
+    )
 }
\ No newline at end of file
diff --git a/lib/strip.ps1 b/lib/strip.ps1
index 1ac1528..c7d920e 100644
--- a/lib/strip.ps1
+++ b/lib/strip.ps1
@@ -155,7 +155,7 @@ class StripEq : IOEq {
 }
 
 class StripDevice : IODevice {
-    StripDevice ([int]$index, [Object]$remote) : base ($index, $remote) {
+    StripDevice ([int]$index, [Object]$remote) : base ($index, $remote, 'Input') {
     }
 
     [string] identifier () {
diff --git a/tests/higher.Tests.ps1 b/tests/higher.Tests.ps1
index 0d06d77..dc128d9 100644
--- a/tests/higher.Tests.ps1
+++ b/tests/higher.Tests.ps1
@@ -983,24 +983,16 @@ Describe -Tag 'higher', -TestName 'All Higher Tests' {
             @{ Index = $phys_out }
         ) {
             Context 'Device' -ForEach @(
-                @{ Value = 'testOutput' }, @{ Value = '' }
+                @{ Driver = 'mme'; Value = 'testMme'; Expected = 'mme' }
+                @{ Driver = 'wdm'; Value = 'testWdm'; Expected = 'wdm' }
+                @{ Driver = 'ks'; Value = 'testKs'; Expected = 'ks' }
+                @{ Driver = 'mme'; Value = ''; Expected = 'none' }
             ) {
-                It "Should set Bus[$index].Device.wdm" {
-                    $vmr.bus[$index].device.wdm = $value
-                    Start-Sleep -Milliseconds 800
-                    $vmr.bus[$index].device.name | Should -Be $value
-                }
-
-                It "Should set Bus[$index].Device.ks" {
-                    $vmr.bus[$index].device.ks = $value
-                    Start-Sleep -Milliseconds 800
-                    $vmr.bus[$index].device.name | Should -Be $value
-                }
-            
-                It "Should set Bus[$index].Device.mme" {
-                    $vmr.bus[$index].device.mme = $value
+                It "Should set Bus[$index].Device.$($driver)" {
+                    $vmr.bus[$index].device.$($driver) = $value
                     Start-Sleep -Milliseconds 800
                     $vmr.bus[$index].device.name | Should -Be $value
+                    $vmr.bus[$index].device.driver | Should -Be $expected
                 }
             }
         }
@@ -1009,24 +1001,16 @@ Describe -Tag 'higher', -TestName 'All Higher Tests' {
             @{ Index = $virt_out }
         ) {
             Context 'Device' -Skip:$ifNotBasic -ForEach @(
-                @{ Value = 'testOutput' }, @{ Value = '' }
+                @{ Driver = 'mme'; Value = 'testMme'; Expected = 'mme' }
+                @{ Driver = 'wdm'; Value = 'testWdm'; Expected = 'wdm' }
+                @{ Driver = 'ks'; Value = 'testKs'; Expected = 'ks' }
+                @{ Driver = 'mme'; Value = ''; Expected = 'none' }
             ) {
-                It "Should set Bus[$index].Device.wdm" {
-                    $vmr.bus[$index].device.wdm = $value
-                    Start-Sleep -Milliseconds 800
-                    $vmr.bus[$index].device.name | Should -Be $value
-                }
-
-                It "Should set Bus[$index].Device.ks" {
-                    $vmr.bus[$index].device.ks = $value
-                    Start-Sleep -Milliseconds 800
-                    $vmr.bus[$index].device.name | Should -Be $value
-                }
-
-                It "Should set Bus[$index].Device.mme" {
-                    $vmr.bus[$index].device.mme = $value
+                It "Should set Bus[$index].Device.$($driver)" {
+                    $vmr.bus[$index].device.$($driver) = $value
                     Start-Sleep -Milliseconds 800
                     $vmr.bus[$index].device.name | Should -Be $value
+                    $vmr.bus[$index].device.driver | Should -Be $expected
                 }
             }
         }