diff --git a/README.md b/README.md
index 494940e..8fd30db 100755
--- a/README.md
+++ b/README.md
@@ -116,6 +116,7 @@ Please refer to original [docs](https://github.com/hundredrabbits/Orca#operators
 - `]` [**crow ii jf note**(*channel* octave note level)](#-crow-jf-ii-note): Just Friends over i2c in voice mode.
 - `}` [**crow ii jf voice**(octave note level)](#-crow-jf-ii-voice): Just Friends over i2c in note mode.
 - `` ` `` [**crow w/syn**(octave note level)](#-crow-wsyn):
+- `)` [**crow ii er301**(*channel* octave note)](#-crow-er301): er301 over i2c
 - `>` [**g.write**(*x* *y* value)](#-gwrite): Sets Grid LED on bang.
 - `<` [**g.read**(*x* *y*)](#-gread): Reads specific coordinates. If value > 6 outputs bang.
 - `(` [**a.read**(*enc*)](#-aread): Reads Arc encoder value
@@ -137,7 +138,7 @@ Please refer to original [docs](https://github.com/hundredrabbits/Orca#operators
 
 | Controller   | Description       | Values    |
 | ------------ | ----------------- | --------- |
-| `K1 + E1`    | Select operator   | `A`–`Z`, `$`, `?`, `/`, `\`, `|`, `-`, `:`, `%`, `!`, `&`, `^`, `~`, `]`, `}`, `` ` ``, `>`, `<`, `=`, `*`, `#` |
+| `K1 + E1`    | Select operator   | `A`–`Z`, `$`, `?`, `/`, `\`, `|`, `-`, `:`, `%`, `!`, `&`, `^`, `~`, `]`, `}`, `)`, `` ` ``, `>`, `<`, `=`, `*`, `#` |
 | `K1 + E2`    | Select value      | `0`–`z`   |
 | `K1 + E3`    | Select note       | `A`–`G`   |
 | `K2`         | Clear character   |           |
@@ -517,6 +518,11 @@ The **CROW JF II VOICE** operator `]` takes up to 3 parameters (*`octave`* `note
 The **CROW JF W/SYN** operator `` ` `` takes up to 3 parameters (*`octave`* `note` `level`).
 
 
+### `)` CROW ER301
+
+The **CROW ER301** operator `)` takes up to 3 parameters (*`channel`* `octave` `note`).
+
+
 ### `>` G.WRITE
 
 The **G.WRITE** operator `>` takes up to 3 inputs (*`x`* *`y`* `value`) and activates Grid LED at given `x`, `y` coordinate.
diff --git a/lib/library.lua b/lib/library.lua
index e37573d..2f15708 100644
--- a/lib/library.lua
+++ b/lib/library.lua
@@ -19,6 +19,7 @@ ops["`"] = include("lib/library/_crow_wsyn")
 ops["<"] = include("lib/library/_grid_read")
 ops[">"] = include("lib/library/_grid_write")
 ops['('] = include("lib/library/_arc_read")
+ops[')'] = include("lib/library/_crow_er301")
 ops["="] = include("lib/library/_osc_out")
 ops.A = include("lib/library/a")
 ops.B = include("lib/library/b")
diff --git a/lib/library/_crow_er301.lua b/lib/library/_crow_er301.lua
new file mode 100644
index 0000000..b438d87
--- /dev/null
+++ b/lib/library/_crow_er301.lua
@@ -0,0 +1,91 @@
+local crow_er301 = function(self, x, y)
+  self.y = y
+  self.x = x
+  self.name = "crow_ii_er301_voice"
+  self.ports = { {1, 0, "in-channel"}, {2, 0, "in-octave"}, {3, 0, "in-note"} }
+  self:spawn(self.ports)
+
+  local transpose_tab = {
+    ["A"] = 9,
+    ["a"] = 10,
+    ["B"] = 11,
+    ["C"] = 0,
+    ["c"] = 1,
+    ["D"] = 2,
+    ["d"] = 3,
+    ["E"] = 4,
+    ["F"] = 5,
+    ["f"] = 6,
+    ["G"] = 7,
+    ["g"] = 8,
+    ["H"] = 9,
+    ["h"] = 10,
+    ["I"] = 11,
+    ["J"] = 12,
+    ["j"] = 13,
+    ["K"] = 14,
+    ["k"] = 15,
+    ["L"] = 16,
+    ["M"] = 17,
+    ["m"] = 18,
+    ["N"] = 19,
+    ["n"] = 20,
+    ["O"] = 21,
+    ["o"] = 22,
+    ["P"] = 23,
+    ["Q"] = 24,
+    ["q"] = 25,
+    ["R"] = 26,
+    ["r"] = 27,
+    ["S"] = 28,
+    ["T"] = 29,
+    ["t"] = 30,
+    ["U"] = 31,
+    ["u"] = 32,
+    ["V"] = 33,
+    ["v"] = 34,
+    ["W"] = 35,
+    ["X"] = 36,
+    ["x"] = 37,
+    ["Y"] = 38,
+    ["y"] = 39,
+    ["Z"] = 40,
+    ["e"] = 4,
+    ["l"] = 5,
+    ["s"] = 5,
+    ["z"] = 5,
+    ["b"] = 12,
+    ["i"] = 12,
+    ["p"] = 12,
+    ["w"] = 12,
+    ["0"] = 0,
+    ["1"] = 2,
+    ["2"] = 4,
+    ["3"] = 5,
+    ["4"] = 7,
+    ["5"] = 9,
+    ["6"] = 11,
+    ["7"] = 12,
+    ["8"] = 14,
+    ["9"] = 16,
+  }
+
+  local channel = util.clamp(self:listen(self.x + 1, self.y) or 0, 0, 35) + 1
+  local octave = (util.clamp(self:listen(self.x + 2, self.y) or 3, 0, 6) * 12) - 36
+  local note = "C"
+
+  if self:glyph_at(self.x + 3, self.y) == "." then
+    note = "C"
+  else
+    note = self:glyph_at(self.x + 3, self.y)
+  end
+
+  local tot_note = transpose_tab[note] + octave
+
+  if self:neighbor(self.x, self.y, "*") then
+    crow.ii.er301.cv(channel, tot_note /12)
+    crow.ii.er301.tr_pulse(channel)
+  end
+end
+
+return crow_er301
diff --git a/lib/library/i.lua b/lib/library/i.lua
index cd8c3e8..0e685c1 100755
--- a/lib/library/i.lua
+++ b/lib/library/i.lua
@@ -5,17 +5,12 @@ local I = function(self, x, y)
   self.ports = { {-1, 0 , "in-step" }, {1, 0, "in-mod" }, {0, 1, "i-out"} }
   self:spawn(self.ports)
 
-  local a = self:listen(self.x - 1, self.y) or 1
-  local b = self:listen(self.x + 1, self.y) or 9
-  local l = self:glyph_at(self.x + 1, self.y)
+  local step = self:listen(self.x - 1, self.y) or 1
+  local mod = self:listen(self.x + 1, self.y) or 36
+  local val = self:listen(self.x, self.y + 1) or 0
+  val = ((val + step) % mod)
 
-  b = b ~= a and b or a + 1 if b < a then a, b = b, a end
-  val = (math.floor(a * self.frame) % b) + 1
-
-  local cap = l ~= "." and l == self.up(l) and true
-  local value = cap and self.up(self.chars[val]) or self.chars[val]
-
-  self:write(0, 1, value)
+  self:write(0, 1, self.chars[val])
 end
 
-return I
\ No newline at end of file
+return I
diff --git a/orca.lua b/orca.lua
index 703d97d..be182d2 100644
--- a/orca.lua
+++ b/orca.lua
@@ -51,7 +51,7 @@ local keycodes = include("lib/keycodes")
 local library = include("lib/library")
 local transpose_table = include("lib/transpose")
 
-local OPS_LIST = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "$", "?", "/", "\\", "|", "-", ":", "%", "!", "&", "^", "~", "]", "}", "`", ">", "<", "(", "=", "*", "#"}
+local OPS_LIST = {"A", "B", "C", "D", "E", "F", "G", "H", "I", "J", "K", "L", "M", "N", "O", "P", "Q", "R", "S", "T", "U", "V", "W", "X", "Y", "Z", "$", "?", "/", "\\", "|", "-", ":", "%", "!", "&", "^", "~", "]", "}", "`", ">", "<", "(", ")", "=", "*", "#"}
 local VAL_LIST = {"0", "1", "2", "3", "4", "5", "6", "7", "8", "9", "a", "b", "c", "d", "e", "f", "g", "h", "i", "j", "k", "l", "m", "n", "o", "p", "q", "r", "s", "t", "u", "v", "w", "x", "y", "z"}
 
 local update_id