diff --git a/doc/7-systems/opl.md b/doc/7-systems/opl.md
index 3e9b0dfd8..d0699f07d 100644
--- a/doc/7-systems/opl.md
+++ b/doc/7-systems/opl.md
@@ -83,4 +83,4 @@ afterwards everyone moved to Windows and software mixed PCM streaming...
 
 this chip uses the [FM (OPL)](../4-instrument/fm-opl.md) instrument editor.
 
-when two channels are joined for 4-op mode, the channel bar will show "`4OP`" on a bracket tying them together.
\ No newline at end of file
+when two channels are joined for 4-op mode, the channel bar will show `4OP` on a bracket tying them together.
\ No newline at end of file
diff --git a/doc/7-systems/pokey.md b/doc/7-systems/pokey.md
index 76daab71c..ca7d21b1d 100644
--- a/doc/7-systems/pokey.md
+++ b/doc/7-systems/pokey.md
@@ -40,6 +40,6 @@ a sound and input chip developed by Atari for their 8-bit computers (Atari 400,
 
 this chip uses the [POKEY](../4-instrument/pokey.md) instrument editor.
 
-when two channels are joined for filtered output, the channel bar will show "`filter`" on a bracket tying them together.
+when two channels are joined for filtered output, the channel bar will show `filter` on a bracket tying them together.
 
-when two channels are joined for wide period range, the channel bar will show "`16-bit`" on a bracket tying them together.
+when two channels are joined for wide period range, the channel bar will show `16-bit` on a bracket tying them together.
diff --git a/doc/7-systems/snes.md b/doc/7-systems/snes.md
index 5547a6d60..76da944ff 100644
--- a/doc/7-systems/snes.md
+++ b/doc/7-systems/snes.md
@@ -65,7 +65,7 @@ Furnace also allows the SNES to use wavetables (and the wavetable synthesizer) i
 
 this chip uses the [SNES](../4-instrument/snes.md) instrument editor.
 
-when two channels are joined for pitch modulation, the channel bar will show "`mod`" on a bracket tying them together.
+when two channels are joined for pitch modulation, the channel bar will show `mod` on a bracket tying them together.
 
 ## channel status