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basic song structure with bass+chords down pat, now melody

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This commit is contained in:
Joachim Fenkes 2012-08-05 01:17:52 +02:00
parent 9b61d22c80
commit 532ef48b8a
1 changed files with 28 additions and 12 deletions
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40
win/main.cpp
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@ -12,28 +12,44 @@ int arpeggio[][4] = {
{ 12, 15, 19, 24 },
{ 15, 19, 22, 27 },
{ 10, 14, 17, 22 },
{ 8, 12, 15, 20 },
{ 12, 15, 17, 22 },
{ 12, 15, 17, 21 },
{ 17, 20, 24, 29 },
{ 14, 17, 22, 26 },
// { 0, 2, 4, 7 },
// { 0, 2, 4, 6 },
// { 0, 2, 5, 9 },
// { 0, 2, 5, 8 },
};
int arpseq[16] = { 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, 0, 0, 1, 2, };
int arpseq[48] = {
0, 0, 1, 2, 0, 0, 6, 2,
0, 0, 1, 2, 0, 0, 1, 7,
0, 0, 1, 2, 0, 0, 6, 2,
0, 0, 1, 2, 0, 0, 1, 2,
3, 3, 2, 2, 0, 0, 4, 5,
3, 3, 2, 2, 0, 0, 1, 2,
};
//int arptiming[32] = { 4, 2, 4, 2, 4, 2, 4, 5, 1, 2, 2 }
const uint32_t arptiming = B32(00001100,00110000,11111011,00001100);
int bassbeat[8] = { 0, 0, 1, 0, 0, 1, 0, 1 };
int bassline[16] = { 12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7 };
int bassline[48] = {
12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7,
12, 12, 15, 10, 12, 12, 17, 10, 12, 12, 15, 7, 8, 8, 3, 7,
8, 8, 10, 10, 12, 12, 5, 5, 8, 8, 10, 10, 12, 12, 15, 10
};
#define LEADSIZE 56
int leadmelody[LEADSIZE] = {
12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 5, 7, 3, 1, 0,
12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 15, 0, 17, 19, 0, 22, 24, 26, 27, 24, 0,
// 8, 3, 0, 8, 10, 12, 14, 15, 19, 17, 0, 12, 7, 0, 12, 14, 15
// 12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 10, 0, 7, 5, 7, 3, 1, 0,
// 12, 7, 0, 12, 0, 14, 15, 0, 14, 0, 12, 0, 14, 15, 0, 14, 0, 15, 0, 17, 19, 0, 22, 24, 26, 27, 24, 0,
8, 3, 0, 8, 10, 12, 14, 15, 19, 17, 0, 12, 7, 0, 12, 14, 15
};
int leadtiming[LEADSIZE] = {
2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
// 2, 1, 1, 2, 1, 3, 2, 2, 1, 3, 14,
// 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
// 2, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 1, 2, 2, 1, 2, 3, 28,
2, 1, 1, 2, 1, 3, 2, 2, 1, 3, 14,
};
static inline unsigned char voice_lead(unsigned long i)
@ -57,13 +73,13 @@ static inline unsigned char voice_lead(unsigned long i)
int note = notes[melody == 1 ? 0 : melody]; // TODO remove this hack by using note table
lead_osc += note;
lead_flange += note + (i & 1);
return (!melody) ? 0 : (((lead_osc >> 6) & 0x7F) + (((lead_osc >> 6) & 0x3F) ^ ((lead_flange >> 6) & 0x3F))); // xor also sounds cool
return (!melody) ? 0 : (((lead_osc >> 6) & 0x7F) + (((lead_osc >> 6) & 0x3F) + ((lead_flange >> 6) & 0x3F))); // xor also sounds cool
}
static inline unsigned char voice_arp(unsigned long i)
{
static uint16_t arp_osc = 0;
int note = notes[arpeggio[arpseq[(i >> 13) & 15]][(i >> 7) & 3]];
int note = notes[arpeggio[arpseq[(i >> 13) % 48]][(i >> 7) & 3]];
arp_osc += note;
return ((arptiming & (1 << (31 - (i >> 9)))) && (arp_osc & (1 << 12))) ? 0 : 140;
//return ((arp_osc >> 5) & 128) - 1;
@ -72,7 +88,7 @@ static inline unsigned char voice_arp(unsigned long i)
static inline unsigned char voice_bass(unsigned long i)
{
static uint16_t bassosc = 0, flangeosc = 0;
int note = notes[bassline[(i >> 13) & 15]];
int note = notes[bassline[(i >> 13) % 48]];
if (bassbeat[(i >> 10) & 7])
note <<= 1;
bassosc += note;
@ -87,7 +103,7 @@ void fill(char *data)
for (int j = 0; j < 4096; j++)
{
unsigned char sample = (voice_lead(i) >> 1) + (voice_bass(i) >> 2) + (voice_arp(i) >> 2);
unsigned char sample = /*(voice_lead(i) >> 1) + */(voice_bass(i) >> 2) + (voice_arp(i) >> 2);
data[j] = sample;
i++;
}