public void dx7_voice_update_mod_depths(hexter_instance instance)
{
byte kp = instance.key_pressure[this.key];
byte cp = instance.channel_pressure;
float pressure;
float pdepth, adepth, mdepth, edepth;
/* add the channel and key pressures together in a way that 'feels' good */
if (kp > cp)
{
pressure = (float)kp / 127.0f;
pressure += (1.0f - pressure) * ((float)cp / 127.0f);
}
else
{
pressure = (float)cp / 127.0f;
pressure += (1.0f - pressure) * ((float)kp / 127.0f);
}
/* calculate modulation depths */
pdepth = (float)this.lfo_pmd / 99.0f;
this.pitch_mod_depth_pmd = (double)Data.dx7_voice_pms_to_semitones[this.lfo_pms] *
(double)pdepth;
// -FIX- this could be optimized:
// -FIX- this just adds everything together -- maybe it should limit the result, or
// combine the various mods like update_pressure() does
pdepth = (((instance.mod_wheel_assign & 0x01) != 0) ?
// -FIX- this assumes that mod_wheel_sensitivity, etc. scale linearly => verify
(float)instance.mod_wheel_sensitivity / 15.0f * instance.mod_wheel :
0.0f) +
(((instance.foot_assign & 0x01) != 0) ?
(float)instance.foot_sensitivity / 15.0f * instance.foot :
0.0f) +
(((instance.pressure_assign & 0x01) != 0) ?
(float)instance.pressure_sensitivity / 15.0f * pressure :
0.0f) +
(((instance.breath_assign & 0x01) != 0) ?
(float)instance.breath_sensitivity / 15.0f * instance.breath :
0.0f);
this.pitch_mod_depth_mods = (double)Data.dx7_voice_pms_to_semitones[this.lfo_pms] *
(double)pdepth;
// -FIX- these are total guesses at how to combine/limit the amp mods:
adepth = Data.dx7_voice_amd_to_ol_adjustment[this.lfo_amd];
// -FIX- this could be optimized:
mdepth = (((instance.mod_wheel_assign & 0x02) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.mod_wheel_sensitivity] *
instance.mod_wheel :
0.0f) +
(((instance.foot_assign & 0x02) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.foot_sensitivity] *
instance.foot :
0.0f) +
(((instance.pressure_assign & 0x02) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.pressure_sensitivity] *
pressure :
0.0f) +
(((instance.breath_assign & 0x02) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.breath_sensitivity] *
instance.breath :
0.0f);
edepth = // -FIX- this could be optimized:
(((instance.mod_wheel_assign & 0x04) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.mod_wheel_sensitivity] *
(1.0f - instance.mod_wheel) :
0.0f) +
(((instance.foot_assign & 0x04) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.foot_sensitivity] *
(1.0f - instance.foot) :
0.0f) +
(((instance.pressure_assign & 0x04) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.pressure_sensitivity] *
(1.0f - pressure) :
0.0f) +
(((instance.breath_assign & 0x04) != 0) ?
Data.dx7_voice_mss_to_ol_adjustment[instance.breath_sensitivity] *
(1.0f - instance.breath) :
0.0f);
/* full-scale amp mod for adepth and edepth should be 52.75 and
* their sum _must_ be limited to less than 128, or bad things will happen! */
if (adepth > 127.5f)
{
adepth = 127.5f;
}
if (adepth + mdepth > 127.5f)
{
mdepth = 127.5f - adepth;
}
if (adepth + mdepth + edepth > 127.5f)
{
edepth = 127.5f - (adepth + mdepth);
}
this.amp_mod_lfo_amd_target = Inline.FLOAT_TO_FP(adepth);
if (this.amp_mod_lfo_amd_value <= Inline.INT_TO_FP(-64))
{
this.amp_mod_lfo_amd_value = this.amp_mod_lfo_amd_target;
this.amp_mod_lfo_amd_increment = 0;
this.amp_mod_lfo_amd_duration = 0;
}
else
{
this.amp_mod_lfo_amd_duration = instance.ramp_duration;
this.amp_mod_lfo_amd_increment = (this.amp_mod_lfo_amd_target - this.amp_mod_lfo_amd_value) /
(Int32)this.amp_mod_lfo_amd_duration;
}
this.amp_mod_lfo_mods_target = Inline.FLOAT_TO_FP(mdepth);
if (this.amp_mod_lfo_mods_value <= Inline.INT_TO_FP(-64))
{
this.amp_mod_lfo_mods_value = this.amp_mod_lfo_mods_target;
this.amp_mod_lfo_mods_increment = 0;
this.amp_mod_lfo_mods_duration = 0;
}
else
{
this.amp_mod_lfo_mods_duration = instance.ramp_duration;
this.amp_mod_lfo_mods_increment = (this.amp_mod_lfo_mods_target - this.amp_mod_lfo_mods_value) /
(Int32)this.amp_mod_lfo_mods_duration;
}
this.amp_mod_env_target = Inline.FLOAT_TO_FP(edepth);
if (this.amp_mod_env_value <= Inline.INT_TO_FP(-64))
{
this.amp_mod_env_value = this.amp_mod_env_target;
this.amp_mod_env_increment = 0;
this.amp_mod_env_duration = 0;
}
else
{
this.amp_mod_env_duration = instance.ramp_duration;
this.amp_mod_env_increment = (this.amp_mod_env_target - this.amp_mod_env_value) /
(Int32)this.amp_mod_env_duration;
}
}
public void dx7_lfo_update(UInt64 sample_count)
{
UInt64 sample;
switch (this.lfo_wave)
{
default:
case 0: /* triangle */
case 1: /* saw down */
case 2: /* saw up */
for (sample = 0; sample < sample_count; sample++)
{
this.lfo_buffer[sample] = this.lfo_value;
this.lfo_value += this.lfo_increment;
if ((--this.lfo_duration) == 0)
{
if (this.lfo_phase != 0)
{
this.lfo_phase = 0;
this.lfo_value = 0;
this.lfo_duration = this.lfo_duration0;
this.lfo_increment = this.lfo_increment0;
}
else
{
this.lfo_phase = 1;
this.lfo_value = Constants.FP_SIZE;
this.lfo_duration = this.lfo_duration1;
this.lfo_increment = this.lfo_increment1;
}
}
}
this.lfo_value_for_pitch = Inline.FP_TO_DOUBLE(this.lfo_value) * 2.0 - 1.0; /* -FIX- this is still ramped for saw! */
break;
case 3: /* square */
for (sample = 0; sample < sample_count; sample++)
{
this.lfo_buffer[sample] = this.lfo_value;
this.lfo_value += this.lfo_increment;
if ((--this.lfo_duration) == 0)
{
switch (this.lfo_phase)
{
default:
case 0:
this.lfo_phase = 1;
this.lfo_duration = this.lfo_duration1;
this.lfo_increment = this.lfo_increment0;
break;
case 1:
this.lfo_phase = 2;
this.lfo_value = 0;
this.lfo_duration = this.lfo_duration0;
this.lfo_increment = 0;
break;
case 2:
this.lfo_phase = 3;
this.lfo_duration = this.lfo_duration1;
this.lfo_increment = this.lfo_increment1;
break;
case 3:
this.lfo_phase = 0;
this.lfo_value = Constants.FP_SIZE;
this.lfo_duration = this.lfo_duration0;
this.lfo_increment = 0;
break;
}
}
}
if (this.lfo_phase == 0 || this.lfo_phase == 3)
{
this.lfo_value_for_pitch = 1.0;
}
else
{
this.lfo_value_for_pitch = -1.0;
}
break;
case 4: /* sine */
for (sample = 0; sample < sample_count; sample++)
{
Int32 phase, index, outx;
phase = this.lfo_value;
index = (phase >> Constants.FP_TO_SINE_SHIFT) & Constants.SINE_MASK;
outx = Data.dx7_voice_sin_table[index];
outx += (Int32)((((Int64)(Data.dx7_voice_sin_table[index + 1] - outx) *
(Int64)(phase & Constants.FP_TO_SINE_MASK)) >>
(Constants.FP_SHIFT + Constants.FP_TO_SINE_SHIFT)));
outx = (outx + Constants.FP_SIZE) >> 1; /* shift to unipolar */
this.lfo_buffer[sample] = outx;
this.lfo_value += this.lfo_increment;
}
this.lfo_value_for_pitch = Inline.FP_TO_DOUBLE(this.lfo_buffer[sample - 1]) * 2.0 - 1.0;
break;
case 5: /* sample/hold */
for (sample = 0; sample < sample_count; sample++)
{
this.lfo_buffer[sample] = this.lfo_value;
this.lfo_value += this.lfo_increment;
if ((--this.lfo_duration) == 0)
{
if (this.lfo_phase != 0)
{
this.lfo_phase = 0;
this.lfo_value = this.lfo_target;
this.lfo_duration = this.lfo_duration0;
this.lfo_increment = 0;
}
else
{
this.lfo_phase = 1;
this.lfo_duration = this.lfo_duration1;
this.lfo_target = StaticRandom.Next(Constants.FP_SIZE);
this.lfo_increment = (this.lfo_target - this.lfo_value) /
(Int32)this.lfo_duration;
}
}
}
this.lfo_value_for_pitch = Inline.FP_TO_DOUBLE(this.lfo_target) * 2.0 - 1.0;
break;
}
}
public void dx7_voice_set_data(hexter_instance instance)
{
byte[] edit_buffer = instance.current_patch_buffer;
bool compat059 = (instance.performance_buffer[0] & 0x01) > 0 ? true : false; /* 0.5.9 compatibility */
int i, j;
double aux_feedbk;
for (i = 0; i < Constants.MAX_DX7_OPERATORS; i++)
{
byte[] eb_op = edit_buffer;
int offset = ((5 - i) * 21);
this.op[i].output_level = (byte)(Inline.limit(eb_op[16 + offset], 0, 99));
this.op[i].osc_mode = (byte)(eb_op[17 + offset] & 0x01);
this.op[i].coarse = (byte)(eb_op[18 + offset] & 0x1f);
this.op[i].fine = (byte)(Inline.limit(eb_op[19 + offset], 0, 99));
this.op[i].detune = (byte)(Inline.limit(eb_op[20 + offset], 0, 14));
this.op[i].level_scaling_bkpoint = (byte)(Inline.limit(eb_op[8 + offset], 0, 99));
this.op[i].level_scaling_l_depth = (byte)(Inline.limit(eb_op[9 + offset], 0, 99));
this.op[i].level_scaling_r_depth = (byte)(Inline.limit(eb_op[10 + offset], 0, 99));
this.op[i].level_scaling_l_curve = (byte)(eb_op[11 + offset] & 0x03);
this.op[i].level_scaling_r_curve = (byte)(eb_op[12 + offset] & 0x03);
this.op[i].rate_scaling = (byte)(eb_op[13 + offset] & 0x07);
this.op[i].amp_mod_sens = (byte)((compat059 ? 0 : eb_op[14 + offset] & 0x03));
this.op[i].velocity_sens = (byte)(eb_op[15 + offset] & 0x07);
for (j = 0; j < 4; j++)
{
this.op[i].eg.base_rate[j] = (byte)(Inline.limit(eb_op[j + offset], 0, 99));
this.op[i].eg.base_level[j] = (byte)(Inline.limit(eb_op[4 + j + offset], 0, 99));
}
}
for (i = 0; i < 4; i++)
{
this.pitch_eg.rate[i] = (byte)(Inline.limit(edit_buffer[126 + i], 0, 99));
this.pitch_eg.level[i] = (byte)(Inline.limit(edit_buffer[130 + i], 0, 99));
}
this.algorithm = (byte)(edit_buffer[134] & 0x1f);
aux_feedbk = (double)(edit_buffer[135] & 0x07) / (2.0 * Constants.M_PI) * 0.18 /* -FIX- feedback_scaling[this.algorithm] */;
/* the "99.0" here is because we're also using this multiplier to scale the
* eg level from 0-99 to 0-1 */
this.feedback_multiplier = (int)Math.Round(aux_feedbk / 99.0 * Constants.FP_SIZE);
this.osc_key_sync = (byte)(edit_buffer[136] & 0x01);
this.lfo_speed = (byte)(Inline.limit(edit_buffer[137], 0, 99));
this.lfo_delay = (byte)(Inline.limit(edit_buffer[138], 0, 99));
this.lfo_pmd = (byte)(Inline.limit(edit_buffer[139], 0, 99));
this.lfo_amd = (byte)(Inline.limit(edit_buffer[140], 0, 99));
this.lfo_key_sync = (byte)(edit_buffer[141] & 0x01);
this.lfo_wave = (byte)(Inline.limit(edit_buffer[142], 0, 5));
this.lfo_pms = (byte)((compat059 ? 0 : edit_buffer[143] & 0x07));
this.transpose = Inline.limit(edit_buffer[144], 0, 48);
}
public void dx7_op_envelope_prepare(hexter_instance instance, int transposed_note, int velocity)
{
int scaled_output_level, i, rate_bump;
float vel_adj;
scaled_output_level = this.output_level;
/* things that affect breakpoint calculations: transpose, ? */
/* things that don't affect breakpoint calculations: pitch envelope, ? */
if ((transposed_note < this.level_scaling_bkpoint + 21) && (this.level_scaling_l_depth != 0))
{
/* On the original DX7/TX7, keyboard level scaling calculations
* group the keyboard into groups of three keys. This can be quite
* noticeable on patches with extreme scaling depths, so I've tried
* to replicate it here (the steps between levels may not occur at
* exactly the keys). If you'd prefer smother scaling, define
* SMOOTH_KEYBOARD_LEVEL_SCALING. */
//#ifndef SMOOTH_KEYBOARD_LEVEL_SCALING
i = this.level_scaling_bkpoint - (((transposed_note + 2) / 3) * 3) + 21;
//#else
// i = this.level_scaling_bkpoint - transposed_note + 21;
//#endif
switch (this.level_scaling_l_curve)
{
case 0: /* -LIN */
scaled_output_level -= (int)((float)i / 45.0f * (float)this.level_scaling_l_depth);
break;
case 1: /* -EXP */
scaled_output_level -= (int)(Math.Exp((float)(i - 72) / 13.5f) * (float)this.level_scaling_l_depth);
break;
case 2: /* +EXP */
scaled_output_level += (int)(Math.Exp((float)(i - 72) / 13.5f) * (float)this.level_scaling_l_depth);
break;
case 3: /* +LIN */
scaled_output_level += (int)((float)i / 45.0f * (float)this.level_scaling_l_depth);
break;
}
if (scaled_output_level < 0)
{
scaled_output_level = 0;
}
if (scaled_output_level > 99)
{
scaled_output_level = 99;
}
}
else if ((transposed_note > this.level_scaling_bkpoint + 21) && (this.level_scaling_r_depth != 0))
{
//#ifndef SMOOTH_KEYBOARD_LEVEL_SCALING
i = (((transposed_note + 2) / 3) * 3) - this.level_scaling_bkpoint - 21;
//#else
// i = transposed_note - op.level_scaling_bkpoint - 21;
//#endif
switch (this.level_scaling_r_curve)
{
case 0: /* -LIN */
scaled_output_level -= (int)((float)i / 45.0f * (float)this.level_scaling_r_depth);
break;
case 1: /* -EXP */
scaled_output_level -= (int)(Math.Exp((float)(i - 72) / 13.5f) * (float)this.level_scaling_r_depth);
break;
case 2: /* +EXP */
scaled_output_level += (int)(Math.Exp((float)(i - 72) / 13.5f) * (float)this.level_scaling_r_depth);
break;
case 3: /* +LIN */
scaled_output_level += (int)((float)i / 45.0f * (float)this.level_scaling_r_depth);
break;
}
if (scaled_output_level < 0)
{
scaled_output_level = 0;
}
if (scaled_output_level > 99)
{
scaled_output_level = 99;
}
}
vel_adj = Data.dx7_voice_velocity_ol_adjustment[velocity] * (float)this.velocity_sens;
/* DEBUG_MESSAGE(DB_NOTE, " dx7_op_envelope_prepare: s_o_l=%d, vel_adj=%f\n", scaled_output_level, vel_adj); */
/* -FIX- This calculation comes from Pinkston/Harrington; the original "* 6.0" scaling factor
* was close to what my TX7 does, but tended to not bump the rate as much, so I changed it
* to "* 6.5" which seems a little closer, but it's still not spot-on. */
/* Things which affect this calculation: transpose, ? */
/* rate_bump = lrintf((float)op.rate_scaling * (float)(transposed_note - 21) / (126.0f - 21.0f) * 127.0f / 128.0f * 6.0f - 0.5f); */
rate_bump = (int)Math.Round(((float)this.rate_scaling * (float)(transposed_note - 21) / (126.0f - 21.0f) * 127.0f / 128.0f * 6.5f - 0.5f));
/* -FIX- just a hunch: try it again with "* 6.0f" but also "(120.0f - 21.0f)" instead of "(126.0f - 21.0f)": */
/* rate_bump = lrintf((float)op.rate_scaling * (float)(transposed_note - 21) / (120.0f - 21.0f) * 127.0f / 128.0f * 6.0f - 0.5f); */
for (i = 0; i < 4; i++)
{
float level = (float)this.eg.base_level[i];
/* -FIX- is this scaling of eg.base_level values to og.level values correct, i.e. does a softer
* velocity shorten the time, since the rate stays the same? */
level = level * (float)scaled_output_level / 99.0f + vel_adj;
if (level < 0.0f)
{
level = 0.0f;
}
else if (level > 99.0f)
{
level = 99.0f;
}
this.eg.level[i] = (byte)Math.Round(level);
this.eg.rate[i] = (byte)(this.eg.base_rate[i] + rate_bump);
if (this.eg.rate[i] > 99)
{
this.eg.rate[i] = 99;
}
}
this.eg.value = Inline.INT_TO_FP(this.eg.level[3]);
this.eg.dx7_op_eg_set_phase(instance, 0);
}