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CT1745 mixer: Speak volume is only in bits 7 and 6, 2 bits total, fixes #4027.

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OBattler
2024-01-13 01:55:30 +01:00
parent ca4f5bad13
commit 8552558cfd
1 changed files with 4 additions and 2 deletions
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6
src/sound/snd_sb.c
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@@ -796,7 +796,9 @@ sb_ct1745_mixer_write(uint16_t addr, uint8_t val, void *priv)
mixer->regs[0x36] = mixer->regs[0x37] = 0xf8;
mixer->regs[0x38] = mixer->regs[0x39] = 0x00;
mixer->regs[0x3a] = mixer->regs[0x3b] = 0x00;
mixer->regs[0x3a] = 0x00;
/* Speaker control - it appears to be in steps of 64. */
mixer->regs[0x3b] = 0x80;
mixer->regs[0x3c] = (OUTPUT_MIC | OUTPUT_CD_R | OUTPUT_CD_L | OUTPUT_LINE_R | OUTPUT_LINE_L);
mixer->regs[0x3d] = (INPUT_MIC | INPUT_CD_L | INPUT_LINE_L | INPUT_MIDI_L);
@@ -980,7 +982,7 @@ sb_ct1745_mixer_write(uint16_t addr, uint8_t val, void *priv)
mixer->line_r = (mixer->output_selector & OUTPUT_LINE_R) ? (sb_att_2dbstep_5bits[mixer->regs[0x39] >> 3] / 32768.0) : 0.0;
mixer->mic = sb_att_2dbstep_5bits[mixer->regs[0x3a] >> 3] / 32768.0;
mixer->speaker = sb_att_2dbstep_5bits[mixer->regs[0x3b] * 3 + 22] / 32768.0;
mixer->speaker = sb_att_7dbstep_2bits[(mixer->regs[0x3b] >> 6) & 0x3] / 32768.0;
mixer->input_gain_L = (mixer->regs[0x3f] >> 6);
mixer->input_gain_R = (mixer->regs[0x40] >> 6);