diff --git a/README.md b/README.md
index 8e2d7b0..eea7f37 100644
--- a/README.md
+++ b/README.md
@@ -4,9 +4,14 @@ Experiment with sound generation in Lua.
 
 ![screenshot](screenshot.png)
 
-# Usage
+## Usage
 
 - Copy `sound.lua.example` to `sound.lua`
 - Open `sound.lua` in your text editor (autosave on change recommended)
 - Run this with `love .`
 - Edit `sound.lua`, and watch (listen) the sound update in real time
+
+## Keys
+
+- `r`: restart sound from the beginning
+- `space`: pause/unpause
diff --git a/main.lua b/main.lua
index c1281f0..190cac8 100644
--- a/main.lua
+++ b/main.lua
@@ -44,6 +44,7 @@ local function init()
 		end
 	end
 end
+local playing=false
 function love.load()
 	love.thread.newThread("thread.lua"):start()
 	init()
@@ -54,29 +55,54 @@ function love.keypressed(key)
 		sour:pause()
 		sour:stop()
 		init()
+	elseif key == "space" then
+		playing = not playing
+		if playing then
+			sour:play()
+		else
+			sour:pause()
+		end
 	end
 end
+local lastc = love.timer.getTime()
+local waitingc = false
 function love.update(dt)
+	local tt = love.timer.getTime()
 	for n=1,sour:getFreeBufferCount()-offset do
 		push("snd",true)
 		offset=offset+1
 		table.remove(chunkd,1)
 	end
+	local tt1 = love.timer.getTime()
+	if tt1-lastc >= chunk*1.2 and not waitingc then
+		waitingc = true
+		push("slook",true)
+	end
+	local tt2 = love.timer.getTime()
 	while sndc:getCount()>0 do
 		local c = sndc:demand()
 		local v = sndc:demand()
 		if c == "snd" then
 			sour:queue(samplify(v))
-			sour:play()
+			if playing then sour:play() end
 			offset=offset-1
 		elseif c == "pos" then
 			pos = v
 		elseif c == "look" then
 			look = v
+			lastc = love.timer.getTime()
+			waitingc = false
 		else
 			error("unkc: "..tostring(c))
 		end
 	end
+	local tt3 = love.timer.getTime()
+	if tt3-tt > 0.01 then
+		print("EE",tt3-tt)
+		print(" 1",tt1-tt)
+		print(" 2",tt2-tt1)
+		print(" 3",tt3-tt2)
+	end
 end
 function love.draw()
 	local w,h = love.graphics.getDimensions()
diff --git a/thread.lua b/thread.lua
index bce2420..4ba40fb 100644
--- a/thread.lua
+++ b/thread.lua
@@ -10,37 +10,47 @@ local function send(c,v)
 	sndc:push(c)
 	sndc:push(v)
 end
-local function go()
+local function go(uu)
 	local t = love.timer.getTime()
 	local ok,err,x = xpcall(function()
 		local snd,x = dofile("sound.lua")
 		snd = snd:phase(pos):clamp(0,chunk,true)
-		snd = assert(snd:compile(rate,bits),"no sound")
-		assert(snd:typeOf("SoundData"),"fake sound")
+		if not uu then
+			snd = assert(snd:compile(rate,bits),"no sound")
+			assert(snd:typeOf("SoundData"),"fake sound")
+		end
 		return snd,x
 	end,debug.traceback)
 	look = tonumber(x) or look
+	local tt = love.timer.getTime()
 	sndc:performAtomic(function()
 		send("look",look)
-		if not ok then
-			send("snd",emsnd)
-			print(err)
-		else
-			send("snd",err)
+		if not uu then
+			if not ok then
+				send("snd",emsnd)
+				print(err)
+			else
+				send("snd",err)
+			end
+			pos=pos+chunk
 		end
-		pos=pos+chunk
 		send("pos",pos)
 	end)
-	t=love.timer.getTime()-t
-	local chnkcc=16
-	local pgb=math.floor(t/chunk*chnkcc+.5)
-	print(("time: %.2f..%.2f\tload: %.2f%%\t[%s%s%s]"):format(
-		pos-chunk,pos,
-		math.floor(t/chunk*100+.5),
-		("#"):rep(math.min(pgb,chnkcc)),
-		("."):rep(math.max(0,chnkcc-pgb)),
-		("!"):rep(math.max(0,-(chnkcc-pgb)))
-	))
+	if love.timer.getTime()-tt > 0.01 then
+	print("TIME TAKEN:",love.timer.getTime()-tt)
+end
+	if not uu then
+		t=love.timer.getTime()-t
+		local chnkcc=16
+		local pgb=math.floor(t/chunk*chnkcc+.5)
+		print(("time: %.2f..%.2f\tload: %.2f%%\t[%s%s%s]"):format(
+			pos-chunk,pos,
+			math.floor(t/chunk*100+.5),
+			("#"):rep(math.min(pgb,chnkcc)),
+			("."):rep(math.max(0,chnkcc-pgb)),
+			("!"):rep(math.max(0,-(chnkcc-pgb)))
+		))
+	end
 end
 while true do
 	local cmd = ctrl:demand()
@@ -59,6 +69,8 @@ while true do
 		bits = v
 	elseif cmd == "snd" then
 		go()
+	elseif cmd == "slook" then
+		go(true)
 	else
 		error("unkc: "..tostring(cmd))
 	end