From 8f8db87ba78bf85cf4455cad8fbcee2250509a48 Mon Sep 17 00:00:00 2001
From: probonopd <probonopd@users.noreply.github.com>
Date: Thu, 1 May 2025 07:29:12 +0200
Subject: [PATCH] Logarithmic mapping for Audio Output Level Attenuator

---
 src/mididevice.cpp | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/mididevice.cpp b/src/mididevice.cpp
index 56c7500..58209d9 100644
--- a/src/mididevice.cpp
+++ b/src/mididevice.cpp
@@ -426,7 +426,9 @@ void CMIDIDevice::MIDIMessageHandler (const u8 *pMessage, size_t nLength, unsign
 							{
 								LOGNOTE("MIDI-SYSEX: Set Audio Output Level Attenuator %d to %d", nTG, val & 0x0F);
 								// Example: F0 43 10 04 1A 00 F7 to F0 43 10 04 1A 07 F7
-								unsigned newVolume = (unsigned)((val & 0x07) * 127 / 7);
+								// Apply logarithmic scaling for volume
+								unsigned attenVal = val & 0x07;
+								unsigned newVolume = (unsigned)(127.0 * pow(attenVal / 7.0, 2.0) + 0.5); // Logarithmic mapping
 								m_pSynthesizer->SetVolume(newVolume, nTG);
 							}
 							break;