diff --git a/src/main/resources/data/computercraft/lua/rom/help/speaker.md b/src/main/resources/data/computercraft/lua/rom/help/speaker.md
index 872f5dfc9..0ea3c2916 100644
--- a/src/main/resources/data/computercraft/lua/rom/help/speaker.md
+++ b/src/main/resources/data/computercraft/lua/rom/help/speaker.md
@@ -1,5 +1,9 @@
 The speaker program plays audio files using speakers attached to this computer.
 
+It supports audio files in a limited number of formats:
+* DFPWM: You can convert music to DFPWM with external tools like https://music.madefor.cc.
+* WAV: WAV files must be 8-bit PCM or DFPWM, with exactly one channel and a sample rate of 48kHz.
+
 ## Examples:
-- `speaker play example.dfpwm left` plays the "example.dfpwm" audio file using the speaker on the left of the computer.
-- `speaker stop` stops any currently playing audio.
+* `speaker play example.dfpwm left` plays the "example.dfpwm" audio file using the speaker on the left of the computer.
+* `speaker stop` stops any currently playing audio.