diff --git a/README.md b/README.md
index 8900609..5a5e7ce 100644
--- a/README.md
+++ b/README.md
@@ -4,7 +4,7 @@
 
 
 ## Features
-* 4 groups of 7 samples stored in QSPI memory (G1_1.wav to G4_7.wav)
+* 4 groups of 7 samples (MONO 44,1k 16bit PCM WAV) stored in QSPI memory (G1_1.wav to G4_7.wav)
 * playback of 1 sample from each grop at a time
 * loop launch quintized to 1/8th (kind of)
 * right channel outputs 15ms 2ppqn pulse for Korg devices