diff --git a/GB_sample_t.md b/GB_sample_t.md
index 95da227..f15406c 100644
--- a/GB_sample_t.md
+++ b/GB_sample_t.md
@@ -12,4 +12,9 @@ In `apu.h`
 
 ## Description
 
-TBD
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+A struct representing a single stereo sample, in signed 16-bit format.
+
+## See Also
+
+* [[GB_apu_set_sample_callback]]
+* [[GB_set_sample_rate]]
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