diff --git a/doc/1-intro/glossary.md b/doc/1-intro/glossary.md
index 437b17669..5b0c87421 100644
--- a/doc/1-intro/glossary.md
+++ b/doc/1-intro/glossary.md
@@ -17,7 +17,7 @@
 **bitbang**: to achieve PCM sound by sending a rapid stream of volume commands to a non-PCM channel.
 
 **bit depth**: the number of bits used for each sample in a PCM stream. 16-bit is considered high quality; lower bit depths introduce more noise and distortion, especially for quieter samples.
-- the "1-bit DPCM" sample type has 6-bit amplitude resolution, but each sample is represented by only 1 bit indicating whether its amplitude differs from the previous sample by one step up or down.
+- the "1-bit DPCM" sample type has 7-bit values, but each sample is represented by only 1 bit indicating whether its value differs from the previous sample by one step up or down.
 
 **bitmask**: a set of bits which represent individual single-bit toggles or groups representing small numbers. these are explained fully in the [hexadecimal primer](hex.md).
 
diff --git a/doc/8-advanced/grooves.md b/doc/8-advanced/grooves.md
index dc516226b..c02852540 100644
--- a/doc/8-advanced/grooves.md
+++ b/doc/8-advanced/grooves.md
@@ -20,7 +20,7 @@ a single `09xx` command will switch to the matching numbered groove pattern.
 
 ## tempo
 
-this is a non-exhaustive list of grooves and their equivalent tempo in BPM when using NTSC or PAL tick rates (60 or 50) and row highlight values of 4 and 16. for more accurate tempos, differing tick rates, or differing row highlight values, use the [groove calculator](https://pineight.com/ft/calcgroove.html) (courtesy of Damian Yerrick).
+this is a non-exhaustive list of grooves and their equivalent tempo in BPM when using NTSC or PAL tick rates (60 or 50) and row highlight values of 4 and 16. for more accurate tempos, differing tick rates, or differing row highlight values, use this [groove calculator](https://pineight.com/ft/calcgroove.html) (courtesy of Damian Yerrick).
 
 BPM NTSC | BPM PAL | groove                 | | BPM NTSC | BPM PAL | groove
 --------:|--------:|:-----------------------|-|---------:|--------:|:----------------------