diff --git a/src/net/torvald/terrarum/audio/AudioMixer.kt b/src/net/torvald/terrarum/audio/AudioMixer.kt
index d35a3bb1e..979dcf8fb 100644
--- a/src/net/torvald/terrarum/audio/AudioMixer.kt
+++ b/src/net/torvald/terrarum/audio/AudioMixer.kt
@@ -258,10 +258,10 @@ class AudioMixer : Disposable {
             it.filters[0] = BinoPan(0f)
         }
 
-        masterTrack.filters[0] = SoftClp
-        masterTrack.filters[1] =  Comp(-36f, 1f, 12f).also {
+        masterTrack.filters[0] =  Comp(-36f, 1f, 12f).also {
             it.bypass = true
         }
+        masterTrack.filters[1] = SoftClp
         masterTrack.filters[2] = Vecto(1.4142f)
         masterTrack.filters[3] = Spectro()
 
diff --git a/src/net/torvald/terrarum/audio/dsp/Comp.kt b/src/net/torvald/terrarum/audio/dsp/Comp.kt
index 292c89aea..d6d895354 100644
--- a/src/net/torvald/terrarum/audio/dsp/Comp.kt
+++ b/src/net/torvald/terrarum/audio/dsp/Comp.kt
@@ -123,12 +123,11 @@ class Comp(
 //        Toolkit.fillArea(batch, x.toFloat() + STRIP_W, y+14f, -STRIP_W * perc, 2f)
 
         batch.color = FILTER_NAME_ACTIVE
-        App.fontSmallNumbers.draw(batch, "T:${threshold.absoluteValue.times(100).roundToInt().div(100f)}", x+3f, y+1f)
-        App.fontSmallNumbers.draw(batch, "K:${knee.absoluteValue.times(100).roundToInt().div(100f)}", x+3f, y+17f)
-        App.fontSmallNumbers.draw(batch, "R:${ratio.absoluteValue.times(100).roundToInt().div(100f)}:1", x+3f, y+33f)
+        App.fontSmallNumbers.draw(batch, "P:${threshold.absoluteValue.toInt()}/${knee.absoluteValue.toInt()}", x+3f, y+1f)
+        App.fontSmallNumbers.draw(batch, "R:${ratio.absoluteValue.times(100).roundToInt().div(100f)}:1", x+3f, y+17f)
     }
 
-    override val debugViewHeight: Int = 48
+    override val debugViewHeight: Int = 32
 
     override fun copyParamsFrom(other: TerrarumAudioFilter) {
         if (other is Comp) {
diff --git a/src/net/torvald/terrarum/modulebasegame/gameworld/GamePostalService.kt b/src/net/torvald/terrarum/modulebasegame/gameworld/GamePostalService.kt
index 7b1bb0db3..1368e30e3 100644
--- a/src/net/torvald/terrarum/modulebasegame/gameworld/GamePostalService.kt
+++ b/src/net/torvald/terrarum/modulebasegame/gameworld/GamePostalService.kt
@@ -50,7 +50,7 @@ class GamePostalService {
 
 data class Post(
     val sender: String, // an identifier for an actor, an entity, etc.; actor identifier is always "UUID:<actor UUID>"
-    val receiver: String, // an identifier for an actor, an entity, etc.; actor identifier is always "UUID:<actor UUID>"
+    val recipient: String, // an identifier for an actor, an entity, etc.; actor identifier is always "UUID:<actor UUID>"
     val postmarkDate: Long, // world TIME_T
     val postType: Int = 0, // 0: regular post; 128: sent by system/NPCs; may be extended with future additions such as registered post
     val postContents: PostContents,
@@ -62,5 +62,64 @@ data class Post(
 data class PostContents(
     val type: String, // "text", "btex"
     val contentsRaw: String, // plain text for "text"; xml for "btex"
-    val contentsExtra: Any? = null
-)
\ No newline at end of file
+    val encryption: String = "none", // "none", "end2end"
+    val contentsExtra: Any? = null,
+)
+
+
+/*
+
+Serialised Post Format
+
+Endianness: little
+
+Chunks:
+- MAGIC
+- HEADER
+- CONTENTSRAW
+- CONTENTSEXTRA
+- PARCEL
+
+When the mail is "sealed" (having encryption="end2end"), each chunk after the HEADER are encrypted.
+Encryption method: AES-128 using ((128 bits Sender UUID) xor (128 bits Recipient UUID)) + ((float64 parcel weight) shake (date in postmark))
+
+MAGIC: 'TeMeSbTR'
+HEADER:
+    - Int8   Protocol version (always 0x01)
+    - Int8   Post type
+    - Int8   Generic flags
+    - Uint24 Offset to CONTENTSRAW
+    - Uint24 Offset to PARCEL (0xFFFFFF to denote null)
+    - Uint24 Offset to CONTENTSEXTRA (0xFFFFFF to denote null)
+    - Int128 The world UUID
+    - Int64  Date in Postmark (ingame world TIME_T)
+    - Uint16 Length of Sender string
+    - Bytes  Sender String
+    - Uint16 Length of Recipient string
+    - Bytes  Recipient String
+
+    Post Type
+    - 0: text, 1: btex
+
+    Flags
+    - 1: not posted (players can edit the contents)
+    - 128: sealed
+
+    Notes: post is either:
+          1. always pre-paid when posted
+          2. not yet encrypted when in not-posted status (can always calculate postage on the fly)
+        so no postage information is needed for the Serialised Format 
+
+CONTENTSRAW
+    - Uint48 unzipped size
+    - Bytes  payload in Zstd compression
+
+CONTENTSEXTRA
+    - Uint48 unzipped size
+    - Bytes  payload in Zstd compression
+
+PARCEL
+    - Uint48 unzipped size
+    - Bytes  FixtureInventory JSON string in Zstd compression
+
+ */
\ No newline at end of file
diff --git a/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt b/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
index 82c011c0a..e3eb65629 100644
--- a/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
+++ b/src/net/torvald/terrarum/ui/BasicDebugInfoWindow.kt
@@ -498,7 +498,7 @@ class BasicDebugInfoWindow : UICanvas() {
     private val stripGap = 1
     private val stripFilterHeight = 16
     private val stripFaderHeight = meterHeight + 20
-    private val numberOfFilters = 14
+    private val numberOfFilters = 15
     private val stripH = stripFaderHeight + stripFilterHeight * numberOfFilters + 16
 
     private val trackBack = listOf(COL_WELL, COL_WELL2)