Properly set max real and virtual channels on FMOD initialization. Fixes sounds noticeably cutting out when the default max of 64 real channels is exceeded.

Assets/Scripts/AudioManager.cs

@@ -6,7 +6,8 @@ using UnityEngine;
 
 public class AudioManager : MonoBehaviour
 {
-    private const int MaxChannels = 128;    // Should match MAX_CHANNELS in sound.h
+    private const int MaxVirtualChannels = 1024;    // Should match MAX_CHANNELS in q_sound.h
+    private const int MaxRealChannels = 128;        // Should match MAX_DYNAMIC_CHANNELS in q_sound.h
     
     private FMOD.System fmodSystem;
     public FMOD.System FmodSystem => fmodSystem;
@@ -79,7 +80,10 @@ public class AudioManager : MonoBehaviour
         
         Debug.Log($"[FMOD] Using output type: {output}");
 
-        result = fmodSystem.init(MaxChannels, FMOD.INITFLAGS.NORMAL, IntPtr.Zero);
+        result = fmodSystem.setSoftwareChannels(MaxRealChannels);
+        CheckFmodResult(result, "FMOD.System.setSoftwareChannels");
+
+        result = fmodSystem.init(MaxVirtualChannels, FMOD.INITFLAGS.NORMAL, IntPtr.Zero);
         CheckFmodResult(result, "FMOD.System.init");
     }
 

engine/Quake/snd_fmod.c

@@ -52,6 +52,20 @@ void S_Startup(void)
 			return;
 		}
 
+		result = FMOD_System_SetSoftwareChannels(fmod_system, MAX_DYNAMIC_CHANNELS);
+		if (result != FMOD_OK)
+		{
+			Con_Printf("Failed to set number of FMOD software channels: %s\n", FMOD_ErrorString(result));
+			return;
+		}
+
+		result = FMOD_System_Init(fmod_system, MAX_CHANNELS, FMOD_INIT_NORMAL, NULL);
+		if (result != FMOD_OK)
+		{
+			Con_Printf("Failed to initialize FMOD System: %s\n", FMOD_ErrorString(result));
+			return;
+		}
+
 		fmod_ownership = true;
 	}