Added an explanation about the invalid instruments used when using the Adlib driver in PQ2

svn-id: r50019

1 files changed, 9 insertions, 2 deletions

diff --git a/engines/sci/sound/drivers/adlib.cpp b/engines/sci/sound/drivers/adlib.cpp
index 44e52cf768..2e56b023e0 100644
--- a/engines/sci/sound/drivers/adlib.cpp
+++ b/engines/sci/sound/drivers/adlib.cpp
@@ -703,8 +703,15 @@ void MidiDriver_AdLib::setVelocityReg(int regOffset, int velocity, int kbScaleLe
 
 void MidiDriver_AdLib::setPatch(int voice, int patch) {
 	if ((patch < 0) || ((uint)patch >= _patches.size())) {
-		// This happens a lot at least in pq2, seems to me as if it's meant for mt32 actually
-		warning("ADLIB: Invalid patch %i requested", patch);
+		// This happens a lot at least in PQ2. This game has a small patch.003 (1344 bytes),
+		// containing 48 instruments. However it has several songs which use instruments
+		// not specified in that patch (namely, songs 1, 3, 5, 9, 15,  16, 17, 23, 25, 27,
+		// 29, 32, 36, 38, 44, 45, 46 all use instruments not specified in patch.003).
+		// These were probably written for MT32. These warnings in PQ2 can probably go away
+		// if a bigger patch.003 file is used (one that contains all the instruments used
+		// by the songs, i.e. 5382 bytes)
+		warning("ADLIB: Invalid patch %i requested (patch.003 contains %d instruments)", 
+			patch, _patches.size());
 		patch = 0;
 	}