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-rw-r--r--engines/agi/sound.cpp4
1 files changed, 2 insertions, 2 deletions
diff --git a/engines/agi/sound.cpp b/engines/agi/sound.cpp
index 672d88d55b..508a065761 100644
--- a/engines/agi/sound.cpp
+++ b/engines/agi/sound.cpp
@@ -554,8 +554,8 @@ void SoundMgr::playMidiSound() {
}
uint8 deltaTime = readByte;
- uint32 bpm = 120; // Don't know if this is correct
- g_midiMillis += (deltaTime * 1000) / bpm;
+ double bpm = 58.25; // Approximation based on tests with Apple IIGS KQ1 and SQ1 under MESS 0.124a
+ g_midiMillis += (uint32) ((deltaTime * 1000) / bpm);
// Check for end of MIDI sequence marker (This time it after reading delta-time)
if (*p == MIDI_BYTE_STOP_SEQUENCE) {