diff --git a/sound/Makefile b/sound/Makefile
new file mode 100644
index 0000000..50dbd33
--- /dev/null
+++ b/sound/Makefile
@@ -0,0 +1,16 @@
+SFX = plasma
+OGG = $(SFX:%=%.ogg)
+WAV = $(SFX:%=%.wav)
+
+all: $(OGG)
+
+%.ogg: %.wav
+	oggenc $<
+
+%.wav: %.csd
+	csound -g -o $@ $<
+
+clean:
+	rm -f $(OGG) $(WAV)
+
+.PHONY: all clean
diff --git a/sound/plasma.csd b/sound/plasma.csd
new file mode 100644
index 0000000..b999fa0
--- /dev/null
+++ b/sound/plasma.csd
@@ -0,0 +1,25 @@
+<CsoundSynthesizer>
+<CsInstruments>
+sr = 48000
+ksmps = 32
+nchnls = 1
+0dbfs = 1
+
+; Plasma shot:
+; Basically a sine wave sweep from 2 kHz to 0.1 kHz in 0.1 s,
+; but with white noise with an amplitude of 500 Hz applied to the frequency.
+
+instr 1
+	gisine ftgen 1, 0, 16384, 10, 1
+	k1 line 2500, p3, 100
+	k2 linrand 500
+	a1 poscil 0.2, k1 + k2, gisine
+	out a1
+endin
+</CsInstruments>
+<CsScore>
+i 1 0 0.1
+e
+</CsScore>
+</CsoundSynthesizer>
+
diff --git a/sound/plasma.ogg b/sound/plasma.ogg
deleted file mode 100644
index 094481d..0000000
Binary files a/sound/plasma.ogg and /dev/null differ