diff --git a/doc/README.md b/doc/README.md
index 8330e43..3620102 100644
--- a/doc/README.md
+++ b/doc/README.md
@@ -38,17 +38,13 @@ Run the eg-amp plugin over the given slice of the file.
 
 Run the Retro Flanger script from the SWH plugins.
 
-Parameters:
- - `delay_depth_avg`: Average stall (ms), 0..10, default 2.5
- - `law_freq`: Flange frequency (Hz), 0.5..8, default 1
+ - `delay_depth_avg` is for the `Average stall (ms)` parameter of the plugin.
+ - `law_freq` is for the `Flange frequency` parameter of the plugin.
 
 ## `eq split index lo mid hi`
 
 Run the DJ EQ plugin from the SWH plugins.
 
-Parameters:
- - `lo`: Low range
-
 `lo`, `mid`, and `hi` are the respective dB gains for each frequency range.
 
 All three ranges accept gains from -70dB to +6dB.
diff --git a/src/custom.zig b/src/custom.zig
index 2fc5a09..df9f331 100644
--- a/src/custom.zig
+++ b/src/custom.zig
@@ -95,10 +95,6 @@ pub const WildNoise = struct {
     }
 };
 
-/// Write any float to the image.
-/// Keep in mind that the bit representation of the float will clash with
-/// the format of BMP pixel data, which means writing 0 everywhere won't give
-/// you the black color.
 pub const Write = struct {
     data: f32,
 
diff --git a/src/image.zig b/src/image.zig
index e031c5a..8686e12 100644
--- a/src/image.zig
+++ b/src/image.zig
@@ -243,22 +243,17 @@ pub const Image = struct {
         position: plugins.Position,
         params: plugins.ParamList,
     ) !void {
-        var timer = try std.time.Timer.start();
-
         var ctx = try plugins.makeContext(self.allocator, plugin_uri);
         defer ctx.deinit();
 
         var ports = try lv2.setupPorts(&ctx);
 
         if (ctx.n_audio_in > 2) {
-            std.debug.warn("plugin <{}> has more than two inputs.\n", plugin_uri);
+            std.debug.warn("plugin <{}> accepts more than two channels.\n", plugin_uri);
             return ImageError.InvalidPlugin;
         }
 
-        if (ctx.n_audio_out > 2) {
-            std.debug.warn("plugin <{}> has more than two outputs.\n", plugin_uri);
-            return ImageError.InvalidPlugin;
-        }
+        // TODO check n_audio_out > 2
 
         // now, for each param for the plugin, we find its port, and set
         // the value for the port there.
@@ -352,9 +347,6 @@ pub const Image = struct {
         _ = c.sf_close(self.sndfile);
 
         try self.reopen(tmpnam);
-
-        var time_taken = timer.read();
-        std.debug.warn("\ttook {d:.2}ms running plugin\n", time_taken / std.time.millisecond);
     }
 
     pub fn saveTo(self: *Image, out_path: []const u8) !void {
diff --git a/src/lang.zig b/src/lang.zig
index 9dc588a..55dd9b2 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -169,66 +169,6 @@ pub const Lang = struct {
         _ = try self.keywords.put("rotate", .Rotate);
     }
 
-    // TODO remove this once AutoHashMap is fixed.
-    pub fn getCommand(self: *Lang, stmt: []const u8) ?CommandType {
-        const commands = [_][]const u8{
-            "noop",
-            "load",
-            "quicksave",
-            "runqs",
-            "amp",
-            "rflanger",
-            "eq",
-            "phaser",
-            "mbeq",
-            "chorus",
-            "pitchscaler",
-            "reverb",
-            "highpass",
-            "delay",
-            "vinyl",
-            "revdelay",
-            "noise",
-            "wildnoise",
-            "write",
-            "rotate",
-        };
-
-        const command_types = [_]CommandType{
-            .Noop,
-            .Load,
-            .Quicksave,
-            .RunQS,
-
-            .Amp,
-            .RFlanger,
-            .Eq,
-            .Phaser,
-            .Mbeq,
-            .Chorus,
-            .PitchScaler,
-            .Reverb,
-            .Highpass,
-            .Delay,
-            .Vinyl,
-            .RevDelay,
-
-            .Noise,
-            .WildNoise,
-            .Write,
-
-            .Rotate,
-        };
-
-        std.debug.assert(commands.len == command_types.len);
-
-        for (commands) |command, idx| {
-            if (std.mem.eql(u8, stmt, command)) return command_types[idx];
-        }
-
-        return null;
-    }
-
     pub fn parse(self: *Lang, data: []const u8) !CommandList {
         var splitted_it = std.mem.separate(data, ";");
         try self.fillKeywords();
@@ -248,12 +188,12 @@ pub const Lang = struct {
             if (cmd_opt == null) return ParseError.NoCommandGiven;
             var command = cmd_opt.?;
 
-            var ctype_opt = self.getCommand(command);
+            var kv_opt = self.keywords.get(command);
             var ctype: CommandType = undefined;
-            if (ctype_opt) |ctype_val| {
-                ctype = ctype_val;
+            if (kv_opt) |kv| {
+                ctype = kv.value;
             } else {
-                std.debug.warn("Unknown command: '{}' ({})\n", command, command.len);
+                std.debug.warn("Unknown command: '{}'\n", command);
                 return ParseError.UnknownCommand;
             }
 
diff --git a/src/plugin.zig b/src/plugin.zig
index 4612523..7794c9e 100644
--- a/src/plugin.zig
+++ b/src/plugin.zig
@@ -99,6 +99,12 @@ pub const RunContext = struct {
             return ImageError.InstantiateFail;
         }
 
+        // we allocate []f32 with size 2 to account for stereo plugins, however
+        // we only use &in_buf[0] and &out_buf[0], and don't use the
+        // (supposedly) right side of neither input or output.
+        var in_buf = try allocator.alloc(f32, 2);
+        std.mem.secureZero(f32, in_buf);
+
         return RunContext{
             .buffers = try RunBuffers.init(allocator),
             .instance = instance.?,