diff --git a/hw/xbox/dsp/dsp_cpu.c b/hw/xbox/dsp/dsp_cpu.c
index ff00e543d1..92cd132b83 100644
--- a/hw/xbox/dsp/dsp_cpu.c
+++ b/hw/xbox/dsp/dsp_cpu.c
@@ -972,8 +972,6 @@ uint32_t dsp56k_read_memory(dsp_core_t* dsp, int space, uint32_t address)
             return dsp->read_peripheral(dsp, address);
         } else if (address >= DSP_MIXBUFFER_BASE && address < DSP_MIXBUFFER_BASE+DSP_MIXBUFFER_SIZE) {
             return dsp->mixbuffer[address-DSP_MIXBUFFER_BASE];
-        } else if (address >= DSP_MIXBUFFER_READ_BASE && address < DSP_MIXBUFFER_READ_BASE+DSP_MIXBUFFER_SIZE) {
-            return dsp->mixbuffer[address-DSP_MIXBUFFER_READ_BASE];
         } else {
             assert(address < DSP_XRAM_SIZE);
             return dsp->xram[address];
@@ -1012,8 +1010,6 @@ static void write_memory_raw(dsp_core_t* dsp, int space, uint32_t address, uint3
             return;
         } else if (address >= DSP_MIXBUFFER_BASE && address < DSP_MIXBUFFER_BASE+DSP_MIXBUFFER_SIZE) {
             dsp->mixbuffer[address-DSP_MIXBUFFER_BASE] = value;
-        } else if (address >= DSP_MIXBUFFER_READ_BASE && address < DSP_MIXBUFFER_READ_BASE+DSP_MIXBUFFER_SIZE) {
-            dsp->mixbuffer[address-DSP_MIXBUFFER_READ_BASE] = value;
         } else {
             assert(address < DSP_XRAM_SIZE);
             dsp->xram[address] = value;
diff --git a/hw/xbox/dsp/dsp_cpu.h b/hw/xbox/dsp/dsp_cpu.h
index 86b31561aa..0f4fc9c308 100644
--- a/hw/xbox/dsp/dsp_cpu.h
+++ b/hw/xbox/dsp/dsp_cpu.h
@@ -112,13 +112,12 @@
 #define DSP_SPACE_Y 0x01
 #define DSP_SPACE_P 0x02
 
-#define DSP_XRAM_SIZE 3072
+#define DSP_XRAM_SIZE 4096
 #define DSP_YRAM_SIZE 2048
 #define DSP_PRAM_SIZE 4096
 
-#define DSP_MIXBUFFER_BASE 3072
+#define DSP_MIXBUFFER_BASE 0x001400
 #define DSP_MIXBUFFER_SIZE 1024
-#define DSP_MIXBUFFER_READ_BASE 5120
 
 #define DSP_PERIPH_BASE 0xFFFF80
 #define DSP_PERIPH_SIZE 128