sound/cem3394.cpp: Fixed "FREQENCY" typo and updated comments. (#14561)

Author: m1macrophage

src/devices/sound/cem3394.cpp

@@ -54,7 +54,7 @@ static constexpr double EXTERNAL_VOLUME = PULSE_VOLUME;
 
 
 // pulse shaping parameters
-// can be enabled with set_limit_pw(true)
+// can be enabled with configure_limit_pw(true)
 // examples:
 //    hat trick - skidding ice sounds too loud if minimum width is too big
 //    snake pit - melody during first level too soft if minimum width is too small
@@ -100,7 +100,7 @@ static constexpr double EXTERNAL_VOLUME = PULSE_VOLUME;
          0.0 == no resonance
         +2.5 == oscillation
 
-    FILTER_FREQENCY
+    FILTER_FREQUENCY
         -3.0 ... +4.0
         -0.375 V/octave
          0.0 == 1300Hz
@@ -610,7 +610,7 @@ void cem3394_device::set_voltage_internal(int input, double voltage)
 			break;
 
 		// filter frequency varies from -3.0 to +4.0, at 0.375V/octave
-		case FILTER_FREQENCY:
+		case FILTER_FREQUENCY:
 			m_filter_frequency = m_filter_zero_freq * pow(2.0, -voltage * (1.0 / 0.375));
 			LOGMASKED(LOG_CONTROL_CHANGES, "FLT_FREQ=%6.3fV -> freq=%f\n", voltage, m_filter_frequency);
 			break;
@@ -712,7 +712,7 @@ double cem3394_device::get_parameter(int input)
 			else
 				return voltage * (1.0 / 2.5);
 
-		case FILTER_FREQENCY:
+		case FILTER_FREQUENCY:
 			return m_filter_zero_freq * pow(2.0, -voltage * (1.0 / 0.375));
 	}
 	return 0.0;

src/devices/sound/cem3394.h

@@ -10,6 +10,8 @@ class cem3394_device : public device_t, public device_sound_interface
 {
 public:
 	// inputs
+	// Each of these CV inputs can either be specified with `set_voltage()`, or
+	// provided via a sound stream.
 	enum
 	{
 		AUDIO_INPUT = 0,  // not valid for set_voltage()
@@ -19,7 +21,7 @@ class cem3394_device : public device_t, public device_sound_interface
 		PULSE_WIDTH,
 		MIXER_BALANCE,
 		FILTER_RESONANCE,
-		FILTER_FREQENCY,
+		FILTER_FREQUENCY,
 		FINAL_GAIN,
 		INPUT_COUNT
 	};
@@ -57,7 +59,7 @@ class cem3394_device : public device_t, public device_sound_interface
 	//    PULSE_WIDTH:        width fraction, from 0.0 to 1.0
 	//    MIXER_BALANCE:      balance, from -1.0 to 1.0
 	//    FILTER_RESONANCE:   resonance, from 0.0 to 1.0
-	//    FILTER_FREQENCY:    frequency, in Hz
+	//    FILTER_FREQUENCY:   frequency, in Hz
 	//    FINAL_GAIN:         gain, in dB
 	// Requesting a parameter associated with a streaming input will force a
 	// stream update.

src/mame/midway/sente6vb.cpp

@@ -295,7 +295,7 @@ void sente6vb_device::update_counter_0_timer()
 
 			// if the filter resonance is high, then they're calibrating the filter frequency
 			if (m_cem_device[i]->get_parameter(cem3394_device::FILTER_RESONANCE) > 0.9)
-				tempfreq = m_cem_device[i]->get_parameter(cem3394_device::FILTER_FREQENCY);
+				tempfreq = m_cem_device[i]->get_parameter(cem3394_device::FILTER_FREQUENCY);
 
 			// otherwise, they're calibrating the VCO frequency
 			else
@@ -392,7 +392,7 @@ void sente6vb_device::chip_select_w(uint8_t data)
 		cem3394_device::VCO_FREQUENCY,
 		cem3394_device::FINAL_GAIN,
 		cem3394_device::FILTER_RESONANCE,
-		cem3394_device::FILTER_FREQENCY,
+		cem3394_device::FILTER_FREQUENCY,
 		cem3394_device::MIXER_BALANCE,
 		cem3394_device::MODULATION_AMOUNT,
 		cem3394_device::PULSE_WIDTH,
@@ -424,7 +424,7 @@ void sente6vb_device::chip_select_w(uint8_t data)
 					"VCO_FREQUENCY",
 					"FINAL_GAIN",
 					"FILTER_RESONANCE",
-					"FILTER_FREQENCY",
+					"FILTER_FREQUENCY",
 					"MIXER_BALANCE",
 					"MODULATION_AMOUNT",
 					"PULSE_WIDTH",

src/mame/sequential/sixtrak.cpp

@@ -384,7 +384,7 @@ void sixtrak_state::update_cvs()
 		cem3394_device::VCO_FREQUENCY,
 		cem3394_device::FINAL_GAIN,
 		cem3394_device::FILTER_RESONANCE,
-		cem3394_device::FILTER_FREQENCY,
+		cem3394_device::FILTER_FREQUENCY,
 		cem3394_device::MIXER_BALANCE,
 		cem3394_device::MODULATION_AMOUNT,
 		cem3394_device::PULSE_WIDTH,
@@ -609,7 +609,7 @@ void sixtrak_state::update_tuning_timer()
 	bool tuning_filter = false;
 	if (voice->get_parameter(cem3394_device::FILTER_RESONANCE) > 0.9)
 	{
-		freq = voice->get_parameter(cem3394_device::FILTER_FREQENCY);
+		freq = voice->get_parameter(cem3394_device::FILTER_FREQUENCY);
 		tuning_filter = true;
 	}
 	else
@@ -901,7 +901,7 @@ void sixtrak_state::sixtrak_common(machine_config &config, device_sound_interfac
 		m_gain_rc[i]->add_route(0, m_voices[i], 1.0, cem3394_device::FINAL_GAIN);
 
 		VA_RC_EG(config, m_freq_rc[i]).set_r(RES_M(1));
-		m_freq_rc[i]->add_route(0, m_voices[i], 1.0, cem3394_device::FILTER_FREQENCY);
+		m_freq_rc[i]->add_route(0, m_voices[i], 1.0, cem3394_device::FILTER_FREQUENCY);
 
 		CEM3394(config, m_voices[i]);
 		const double c_vco = C_VCO + C_VCO * C_VCO_JITTER[i] * 0.025;  // +/- 2.5%.