diff --git a/terranmon.txt b/terranmon.txt
index 174e473..4fdf665 100644
--- a/terranmon.txt
+++ b/terranmon.txt
@@ -429,6 +429,8 @@ Packet Types -
     Add 128 to the resulting number if the frame has a padding bit (should not happen on 32kHz sampling rate)
     Special value of 255 may indicate some errors
 
+    To encode an audio to compliant format, use ffmpeg: ffmpeg -i <your_music> -acodec libtwolame -b:a <rate>k -ar 32000 <output.mp2>
+
 GLOBAL TYPE 0 Packet -
     uint32 SIZE OF FRAMEDATA
     *      FRAMEDATA COMPRESSED IN GZIP
diff --git a/tsvm_executable/src/net/torvald/tsvm/AudioMenu.kt b/tsvm_executable/src/net/torvald/tsvm/AudioMenu.kt
index 41f8e2a..2018e30 100644
--- a/tsvm_executable/src/net/torvald/tsvm/AudioMenu.kt
+++ b/tsvm_executable/src/net/torvald/tsvm/AudioMenu.kt
@@ -120,7 +120,7 @@ class AudioMenu(parent: VMEmuExecutable, x: Int, y: Int, w: Int, h: Int) : EmuMe
                     val smpRH = (smpR * envelopeHalfHeight).roundToInt() // -50..50
 
                     batch.fillRect(x + s, y + 27, 1, smpLH)
-                    batch.fillRect(x + s, y + 81, 1, smpLH)
+                    batch.fillRect(x + s, y + 81, 1, smpRH)
                 }
             }
             else {