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-rw-r--r--source/nds/ds2sound.h21
-rw-r--r--source/nds/entry.cpp4
2 files changed, 14 insertions, 11 deletions
diff --git a/source/nds/ds2sound.h b/source/nds/ds2sound.h
index f51a6e1..8c0e2bf 100644
--- a/source/nds/ds2sound.h
+++ b/source/nds/ds2sound.h
@@ -1,21 +1,24 @@
// The sound buffer sizes used on the DS2's side, for each value of
// Settings.SoundPlaybackRate.
+// * Don't buffer too much, otherwise audio is delayed from video.
+// * Don't go below one frame (20 milliseconds).
+// * Buffer sizes must be multiples of 128.
#define DS2_BUFFER_SIZE_4 512 /* tested working */
-#define DS2_BUFFER_SIZE_5 1024 /* like the SNES! tested working, but slow */
-#define DS2_BUFFER_SIZE_6 1024 /* tested working, slow because of upsampling */
-#define DS2_BUFFER_SIZE_7 1024 /* tested working, slow because of upsampling */
+#define DS2_BUFFER_SIZE_5 640 /* like the SNES! tested working */
+#define DS2_BUFFER_SIZE_6 896 /* tested working */
+#define DS2_BUFFER_SIZE_7 1024 /* tested working */
// The sampling rate for the sound, in Hz, for each value of
// Settings.SoundPlaybackRate.
#define SND_SAMPLE_RATE_1 8000
#define SND_SAMPLE_RATE_2 11025
#define SND_SAMPLE_RATE_3 16000
-#define SND_SAMPLE_RATE_4 22050
-#define SND_SAMPLE_RATE_5 32000
+#define SND_SAMPLE_RATE_4 22050 /* NDSSFC 1.06 - CATSFC 1.28 used this one */
+#define SND_SAMPLE_RATE_5 32000 /* like the SNES! */
#define SND_SAMPLE_RATE_6 44100
-#define SND_SAMPLE_RATE_7 48000
+#define SND_SAMPLE_RATE_7 48000 /* CATSFC 1.25 made using this one possible */
// Settings in use. The number should match in all three settings.
-#define DS2_BUFFER_SIZE DS2_BUFFER_SIZE_4
-#define SND_SAMPLE_RATE SND_SAMPLE_RATE_4
-#define SNES9X_SRATE_ID 4
+#define DS2_BUFFER_SIZE DS2_BUFFER_SIZE_5
+#define SND_SAMPLE_RATE SND_SAMPLE_RATE_5
+#define SNES9X_SRATE_ID 5
diff --git a/source/nds/entry.cpp b/source/nds/entry.cpp
index ca27249..723374c 100644
--- a/source/nds/entry.cpp
+++ b/source/nds/entry.cpp
@@ -425,7 +425,7 @@ void init_sfc_setting(void)
//sound settings
Settings.APUEnabled = Settings.NextAPUEnabled = TRUE;
Settings.FixFrequency = 1;
-
+ Settings.InterpolatedSound = TRUE;
Settings.H_Max = SNES_CYCLES_PER_SCANLINE;
Settings.SkipFrames = AUTO_FRAMERATE;
@@ -1042,7 +1042,7 @@ void S9xGenerateSound ()
}
}
-#define SOUND_EMISSION_INTERVAL ((unsigned int) ((((unsigned long long) DS2_BUFFER_SIZE * 1000000) / SND_SAMPLE_RATE) * 3 / 128))
+#define SOUND_EMISSION_INTERVAL ((unsigned int) ((((unsigned long long) DS2_BUFFER_SIZE * 1000000) / SND_SAMPLE_RATE) * 3 / 128) - 1) /* -1 is for roundoff errors */
unsigned int LastSoundEmissionTime = 0;
void S9xProcessSound (unsigned int)