OPZ: fix EGShift emulation
1. the TX81Z has operators in reverse order 2. don't early out if EGShift is not 0
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@ -480,7 +480,7 @@ if (m_choffs == 0)
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#endif
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// early out if the envelope is effectively off
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if (m_env_attenuation > EG_QUIET)
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if (m_env_attenuation > EG_QUIET && m_cache.eg_shift == 0)
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return 0;
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// get the absolute value of the sin, as attenuation, as a 4.8 fixed point value
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@ -472,9 +472,8 @@ void opz_registers::cache_operator_data(uint32_t choffs, uint32_t opoffs, opdata
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if (reverb != 0)
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cache.eg_rate[EG_REVERB] = std::min<uint32_t>(effective_rate(reverb * 4 + 2, ksrval), cache.eg_rate[EG_REVERB]);
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// set the envelope shift; TX81Z manual says operator 1 shift is fixed at "off"
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// TODO: change 0 to 3? operators are in reverse order in TX81Z
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cache.eg_shift = ((opoffs & 0x18) == 0) ? 0 : op_eg_shift(opoffs);
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// set the envelope shift; TX81Z manual says operator 1 (actually operator 4) shift is fixed at "off"
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cache.eg_shift = ((opoffs & 0x18) == 0x18) ? 0 : op_eg_shift(opoffs);
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}
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