diff --git a/book/src/fivecomb.md b/book/src/fivecomb.md
index 1d6d926..f89ea20 100644
--- a/book/src/fivecomb.md
+++ b/book/src/fivecomb.md
@@ -43,7 +43,9 @@ position.*
 
 ### `freq1..5` and `freq` — the tuning
 
-Per-voice frequencies (5 Hz floor, the GRM's own) plus a master multiplier
+Per-voice frequencies (5 Hz floor, the GRM's own) — or the `notes`
+message, which tunes up to five combs from MIDI note numbers in one list
+(fractional allowed) — plus a master multiplier
 (0..2) that transposes the whole bank — the master is the *performance*
 control, gliding every voice proportionally so chords stay chords.
 
diff --git a/book/src/recipes/comb-drones.md b/book/src/recipes/comb-drones.md
index 5182f10..17d359e 100644
--- a/book/src/recipes/comb-drones.md
+++ b/book/src/recipes/comb-drones.md
@@ -13,8 +13,12 @@ measured and explained in [five strings, no guitar](../fivecomb.md) and
 
 ## Voicings to keep
 
-Tunings in Hz; MIDI equivalents in parentheses for orientation. (The
-object speaks Hz only — keep `mtof` handy, or this table.)
+Tunings in Hz; MIDI equivalents in parentheses for orientation. The
+`notes` message tunes a voicing in one gesture — up to five MIDI note
+numbers, fractional allowed, so just-intonation intervals land exactly
+(`notes 45 52 57 60.86 64` is the major glow with its true 5/4 third at
+275 Hz) — and the Hz attributes remain for exact ratios like the bell
+plate.
 
 | voicing | freq1..5 | character |
 |---|---|---|