diff --git a/lib/io.ps1 b/lib/io.ps1
new file mode 100644
index 0000000..07982b9
--- /dev/null
+++ b/lib/io.ps1
@@ -0,0 +1,151 @@
+class IOControl : IRemote {
+    IOControl ([int]$index, [Object]$remote) : base ($index, $remote) {
+        AddBoolMembers -PARAMS @('mute')
+        AddFloatMembers -PARAMS @('gain')
+        AddStringMembers -PARAMS @('label')
+    }
+
+    [void] FadeTo ([single]$target, [int]$time) {
+        $this.Setter('FadeTo', "($target, $time)")
+    }
+
+    [void] FadeBy ([single]$target, [int]$time) {
+        $this.Setter('FadeBy', "($target, $time)")
+    }
+}
+
+class IOLevels : IRemote {
+    IOLevels ([int]$index, [Object]$remote) : base ($index, $remote) {
+    }
+
+    hidden [single] Convert([single]$val) {
+        if ($val -gt 0) { 
+            return [math]::Round(20 * [math]::Log10($val), 1) 
+        } 
+        else { 
+            return -200.0 
+        }
+    }
+
+    [System.Collections.ArrayList] Getter([int]$mode) {
+        [System.Collections.ArrayList]$vals = @()
+        $this.init..$($this.init + $this.offset - 1) | ForEach-Object {
+            $vals.Add($this.Convert($(Get_Level -MODE $mode -INDEX $_)))
+        }
+        return $vals
+    }
+}
+
+class IOEq : IRemote {
+    [System.Collections.ArrayList]$channel
+    [string]$kindOfEq
+    
+    IOEq ([int]$index, [Object]$remote, [string]$kindOfEq) : base ($index, $remote) {
+        $this.kindOfEq = $kindOfEq
+
+        AddBoolMembers -PARAMS @('on', 'ab')
+
+        $this.channel = @()
+        for ($ch = 0; $ch -lt $remote.kind.eq_ch[$this.kindOfEq]; $ch++) {
+            $this.channel.Add([EqChannel]::new($ch, $remote, $this.identifier()))
+        }
+    }
+
+    [void] Load ([string]$filename) {
+        $param = 'Command.Load{0}Eq[{1}]' -f $this.kindOfEq, $this.index
+        $this.remote.Setter($param, $filename)
+    }
+
+    [void] Save ([string]$filename) {
+        $param = 'Command.Save{0}Eq[{1}]' -f $this.kindOfEq, $this.index
+        $this.remote.Setter($param, $filename)
+    }
+}
+
+class EqChannel : IRemote {
+    [System.Collections.ArrayList]$cell
+    [string]$eqId
+    
+    EqChannel ([int]$index, [Object]$remote, [string]$eqId) : base ($index, $remote) {
+        $this.eqId = $eqId
+
+        $this.cell = @()
+        $cellCount = $this.remote.kind.cells
+        for ($c = 0; $c -lt $cellCount; $c++) {
+            $this.cell.Add([EqCell]::new($c, $remote, $this.identifier()))
+        }
+    }
+
+    [string] identifier () {
+        return '{0}.Channel[{1}]' -f $this.eqId, $this.index
+    }
+}
+
+class EqCell : IRemote {
+    [string]$channelId
+    
+    EqCell ([int]$index, [Object]$remote, [string]$channelId) : base ($index, $remote) {
+        $this.channelId = $channelId
+
+        AddBoolMembers -PARAMS @('on')
+        AddIntMembers -PARAMS @('type')
+        AddFloatMembers -PARAMS @('f', 'gain', 'q')
+    }
+
+    [string] identifier () {
+        return '{0}.Cell[{1}]' -f $this.channelId, $this.index
+    }
+}
+
+class IODevice : IRemote {
+    IODevice ([int]$index, [Object]$remote) : base ($index, $remote) {
+    }
+
+    hidden $_name = $($this | Add-Member ScriptProperty 'name' `
+        {
+            $this.Getter_String('name')
+        } `
+        {
+            return Write-Warning ("ERROR: $($this.identifier()).name is read only")
+        }
+    )
+
+    hidden $_sr = $($this | Add-Member ScriptProperty 'sr' `
+        {
+            [int]$this.Getter('sr')
+        } `
+        {
+            return Write-Warning ("ERROR: $($this.identifier()).sr is read only")
+        }
+    )
+
+    hidden $_wdm = $($this | Add-Member ScriptProperty 'wdm' `
+        {
+            return Write-Warning ("ERROR: $($this.identifier()).wdm is write only")
+        } `
+        {
+            param([string]$arg)
+            return $this.Setter('wdm', $arg)
+        }
+    )
+
+    hidden $_ks = $($this | Add-Member ScriptProperty 'ks' `
+        {
+            return Write-Warning ("ERROR: $($this.identifier()).ks is write only")
+        } `
+        {
+            param([string]$arg)
+            return $this.Setter('ks', $arg)
+        }
+    )
+
+    hidden $_mme = $($this | Add-Member ScriptProperty 'mme' `
+        {
+            return Write-Warning ("ERROR: $($this.identifier()).mme is write only")
+        } `
+        {
+            param([string]$arg)
+            return $this.Setter('mme', $arg)
+        }
+    )
+}
\ No newline at end of file