diff --git a/examples/highpass.scri b/examples/highpass.scri
index 3c58799..dab6def 100644
--- a/examples/highpass.scri
+++ b/examples/highpass.scri
@@ -1,3 +1,3 @@
 load :0;
-highpass 3 1 1000 0 0;
+highpass 3 1 7800 0 0;
 quicksave;
diff --git a/src/lang.zig b/src/lang.zig
index 20e0b3a..c2e475d 100644
--- a/src/lang.zig
+++ b/src/lang.zig
@@ -27,6 +27,7 @@ pub const CommandType = enum {
 pub const Command = struct {
     command: CommandType,
     args: ArgList,
+    cur_idx: usize = 0,
 
     pub fn print(self: *const Command) void {
         std.debug.warn("cmd:{}\n", self.command);
@@ -48,7 +49,8 @@ pub const Command = struct {
         return try std.fmt.parseInt(usize, arg, 10);
     }
 
-    pub fn consumePosition(self: *const Command) !plugin.Position {
+    pub fn consumePosition(self: *Command) !plugin.Position {
+        self.cur_idx = 2;
         return plugin.Position{
             .split = try self.usizeArgAt(0),
             .index = try self.usizeArgAt(1),
@@ -88,12 +90,13 @@ pub const Command = struct {
     }
 
     pub fn appendParam(
-        self: *const Command,
+        self: *Command,
         params: *plugin.ParamList,
         symbol: []const u8,
-        idx: usize,
     ) !void {
-        var val = try self.floatArgAt(idx);
+        var val = try self.floatArgAt(self.cur_idx);
+        self.cur_idx += 1;
+
         try params.append(plugin.Param{
             .sym = symbol,
             .value = val,
diff --git a/src/runner.zig b/src/runner.zig
index 029122c..3d62267 100644
--- a/src/runner.zig
+++ b/src/runner.zig
@@ -224,22 +224,22 @@ pub const Runner = struct {
 
             .Amp => blk: {
                 const pos = try cmd.consumePosition();
-                try cmd.appendParam(&params, "gain", 2);
+                try cmd.appendParam(&params, "gain");
                 try self.ampCmd(pos, params);
             },
 
             .RFlanger => blk: {
                 const pos = try cmd.consumePosition();
-                try cmd.appendParam(&params, "delay_depth_avg", 2);
-                try cmd.appendParam(&params, "law_freq", 3);
+                try cmd.appendParam(&params, "delay_depth_avg");
+                try cmd.appendParam(&params, "law_freq");
                 try self.rFlangerCmd(pos, params);
             },
 
             .Eq => blk: {
                 const pos = try cmd.consumePosition();
-                try cmd.appendParam(&params, "lo", 2);
-                try cmd.appendParam(&params, "mid", 3);
-                try cmd.appendParam(&params, "hi", 4);
+                try cmd.appendParam(&params, "lo");
+                try cmd.appendParam(&params, "mid");
+                try cmd.appendParam(&params, "hi");
 
                 try self.eqCmd(pos, params);
             },
@@ -247,10 +247,10 @@ pub const Runner = struct {
             .Phaser => blk: {
                 const pos = try cmd.consumePosition();
 
-                try cmd.appendParam(&params, "lfo_rate", 2);
-                try cmd.appendParam(&params, "lfo_depth", 3);
-                try cmd.appendParam(&params, "fb", 4);
-                try cmd.appendParam(&params, "spread", 5);
+                try cmd.appendParam(&params, "lfo_rate");
+                try cmd.appendParam(&params, "lfo_depth");
+                try cmd.appendParam(&params, "fb");
+                try cmd.appendParam(&params, "spread");
 
                 try self.phaserCmd(pos, params);
             },
@@ -264,34 +264,34 @@ pub const Runner = struct {
             .Chorus => blk: {
                 const pos = try cmd.consumePosition();
 
-                try cmd.appendParam(&params, "voices", 2);
-                try cmd.appendParam(&params, "delay_base", 3);
-                try cmd.appendParam(&params, "voice_spread", 4);
-                try cmd.appendParam(&params, "detune", 5);
-                try cmd.appendParam(&params, "law_freq", 6);
-                try cmd.appendParam(&params, "attendb", 7);
+                try cmd.appendParam(&params, "voices");
+                try cmd.appendParam(&params, "delay_base");
+                try cmd.appendParam(&params, "voice_spread");
+                try cmd.appendParam(&params, "detune");
+                try cmd.appendParam(&params, "law_freq");
+                try cmd.appendParam(&params, "attendb");
 
                 try self.chorusCmd(pos, params);
             },
 
             .PitchScaler => blk: {
                 const pos = try cmd.consumePosition();
-                try cmd.appendParam(&params, "mult", 2);
+                try cmd.appendParam(&params, "mult");
                 try self.pitchScalerCmd(pos, params);
             },
 
             .Reverb => blk: {
                 const pos = try cmd.consumePosition();
 
-                try cmd.appendParam(&params, "roomLength", 2);
-                try cmd.appendParam(&params, "roomHeight", 3);
-                try cmd.appendParam(&params, "sourceLR", 4);
-                try cmd.appendParam(&params, "sourceFB", 5);
-                try cmd.appendParam(&params, "listLR", 6);
-                try cmd.appendParam(&params, "listFB", 7);
-                try cmd.appendParam(&params, "hpf", 8);
-                try cmd.appendParam(&params, "warmth", 9);
-                try cmd.appendParam(&params, "diffusion", 10);
+                try cmd.appendParam(&params, "roomLength");
+                try cmd.appendParam(&params, "roomHeight");
+                try cmd.appendParam(&params, "sourceLR");
+                try cmd.appendParam(&params, "sourceFB");
+                try cmd.appendParam(&params, "listLR");
+                try cmd.appendParam(&params, "listFB");
+                try cmd.appendParam(&params, "hpf");
+                try cmd.appendParam(&params, "warmth");
+                try cmd.appendParam(&params, "diffusion");
 
                 try self.reverbCmd(pos, params);
             },
@@ -299,9 +299,9 @@ pub const Runner = struct {
             .Highpass => blk: {
                 const pos = try cmd.consumePosition();
 
-                try cmd.appendParam(&params, "freq", 2);
-                try cmd.appendParam(&params, "gain", 3);
-                try cmd.appendParam(&params, "noClip", 4);
+                try cmd.appendParam(&params, "freq");
+                try cmd.appendParam(&params, "gain");
+                try cmd.appendParam(&params, "noClip");
 
                 try self.highpassCmd(pos, params);
             },