diff --git a/GB_set_sample_rate.md b/GB_set_sample_rate.md
index f13e147..baadfc7 100644
--- a/GB_set_sample_rate.md
+++ b/GB_set_sample_rate.md
@@ -10,8 +10,15 @@ In `apu.h`
 
 ## Description
 
-TBD
+`GB_set_sample_rate` and `GB_set_sample_rate_by_clocks` control the output sample rate of an emulator instance. `GB_set_sample_rate` sets the sample rate in Hz, and `GB_set_sample_rate_by_clocks` sets it by the number of APU ticks each sample should last. The APU normally ticks at 2MHz (2,097,152Hz) when emulating a non-Super Game Boy [[model|GB_model_t]] without [[overclocking or underclocking|GB_set_clock_multiplier]].
+
+`GB_get_sample_rate` will return the current sample rate in Hertz.
 
 ## Thread Safety
 
 `GB_set_sample_rate` must not be called if the instance is being run in another thread, but may be called from the current one (via a callback).
+
+## See Also
+
+* [[GB_apu_set_sample_callback]]
+* [[GB_sample_t]]
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