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Improved sample format courtesy of OG.

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Realized that XRally uses 66150 Hz as music tempo for Network BGM. Sounds reasonable, but urgh because the thing uses *something* for BPM.
This commit is contained in:
Angelo Salese 2015-04-09 23:06:16 +02:00
parent a3b40995ce
commit 03c8be0555
1 changed files with 11 additions and 5 deletions
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16
src/emu/sound/l7a1045_l6028_dsp_a.c
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@ -73,6 +73,12 @@
Sample data format TBA
TODO:
- Sample format needs to be double checked;
- Octave Control/BPM/Pitch, right now XRally Network BGM wants 66150 Hz which is definitely too fast for Terry Bogard speech;
- Key Off;
- ADSR (registers 2 & 4?);
***************************************************************************/
#include "emu.h"
@ -110,7 +116,7 @@ l7a1045_sound_device::l7a1045_sound_device(const machine_config &mconfig, const
void l7a1045_sound_device::device_start()
{
/* Allocate the stream */
m_stream = stream_alloc(0, 2, 44100); //clock() / 384);
m_stream = stream_alloc(0, 2, 66150); //clock() / 384);
m_rom = m_region->base();
m_rom_size = m_region->bytes();
@ -164,11 +170,11 @@ void l7a1045_sound_device::sound_stream_update(sound_stream &stream, stream_samp
data = m_rom[(start + pos) & (m_rom_size-1)];
sample = (INT8)data;
sample = ((INT8)(data & 0xfc)) << (3 - (data & 3));
frac += step;
outputs[0][j] += ((sample * vptr->l_volume) >> 8);
outputs[1][j] += ((sample * vptr->r_volume) >> 8);
outputs[0][j] += ((sample * vptr->l_volume) >> 9);
outputs[1][j] += ((sample * vptr->r_volume) >> 9);
}
vptr->pos = pos;
@ -322,7 +328,7 @@ WRITE16_MEMBER(l7a1045_sound_device::sound_status_w)
{
l7a1045_voice *vptr = &m_voice[m_audiochannel];
#if 1
#if 0
if(vptr->start != 0)
{
printf("%08x START\n",vptr->start);