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Set soundboard CPU to correct clock speed

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The 68K on the soundboard is rated at 12 MHz but runs at 11.2896 MHz, which is 256 cycles/sample with a 44100 Hz sample rate. Removed SoundClock and Freq as they are not needed
This commit is contained in:
gm-matthew 2023-07-05 02:45:35 +01:00 committed by trzy
parent 015e8e9212
commit 7924fed369
1 changed files with 1 additions and 5 deletions
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6
Src/Sound/SCSP.cpp
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@ -88,8 +88,6 @@ bool legacySound; // For LegacySound (SCSP DSP) config option.
//#define CORRECT_FOR_18BIT_DAC //#define CORRECT_FOR_18BIT_DAC
// These globals control the operation of the SCSP, they are no longer extern and are set through SCSP_SetBuffers(). --Bart // These globals control the operation of the SCSP, they are no longer extern and are set through SCSP_SetBuffers(). --Bart
static double SoundClock; // Originally titled SysFPS; seems to be for the sound CPU.
static const double Freq = 76;
static float* bufferfl; static float* bufferfl;
static float* bufferfr; static float* bufferfr;
static float* bufferrl; static float* bufferrl;
@ -606,7 +604,6 @@ bool SCSP_Init(const Util::Config::Node &config, int n)
s_config = &config; s_config = &config;
s_multiThreaded = config["MultiThreaded"].ValueAs<bool>(); s_multiThreaded = config["MultiThreaded"].ValueAs<bool>();
legacySound = config["LegacySoundDSP"].ValueAs<bool>(); legacySound = config["LegacySoundDSP"].ValueAs<bool>();
SoundClock = Freq;
if(n==2) if(n==2)
{ {
@ -1516,7 +1513,7 @@ void SCSP_CpuRunScanline()
void SCSP_DoMasterSamples(int nsamples) void SCSP_DoMasterSamples(int nsamples)
{ {
int slice = (int)(12000000. / (SoundClock*nsamples)); // 68K cycles/sample const int slice = 11289600 / 44100; // 68K runs at 256 cycles/sample
static int lastdiff = 0; static int lastdiff = 0;
/* /*
@ -2130,7 +2127,6 @@ void SCSP_LoadState(CBlockFile *StateFile)
void SCSP_SetBuffers(float *leftBufferPtr, float *rightBufferPtr, float* leftRearBufferPtr, float* rightRearBufferPtr, int bufferLength) void SCSP_SetBuffers(float *leftBufferPtr, float *rightBufferPtr, float* leftRearBufferPtr, float* rightRearBufferPtr, int bufferLength)
{ {
SoundClock = Freq;
bufferfl = leftBufferPtr; bufferfl = leftBufferPtr;
bufferfr = rightBufferPtr; bufferfr = rightBufferPtr;
bufferrl = leftRearBufferPtr; bufferrl = leftRearBufferPtr;