src/share/classes/javax/sound/midi/MidiChannel.java

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@@ -1,7 +1,7 @@
 /*
- * Copyright (c) 1998, 2004, Oracle and/or its affiliates. All rights reserved.
+ * Copyright (c) 1998, 2014, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.  Oracle designates this

@@ -23,515 +23,452 @@
  * questions.
  */
 
 package javax.sound.midi;
 
-
 /**
- * A <code>MidiChannel</code> object represents a single MIDI channel.
- * Generally, each <code>MidiChannel</code> method processes a like-named MIDI
- * "channel voice" or "channel mode" message as defined by the MIDI specification. However,
- * <code>MidiChannel</code> adds some "get" methods  that retrieve the value
- * most recently set by one of the standard MIDI channel messages.  Similarly,
- * methods for per-channel solo and mute have been added.
- * <p>
- * A <code>{@link Synthesizer}</code> object has a collection
- * of <code>MidiChannels</code>, usually one for each of the 16 channels
- * prescribed by the MIDI 1.0 specification.  The <code>Synthesizer</code>
- * generates sound when its <code>MidiChannels</code> receive
- * <code>noteOn</code> messages.
+ * A {@code MidiChannel} object represents a single MIDI channel. Generally,
+ * each {@code MidiChannel} method processes a like-named MIDI "channel voice"
+ * or "channel mode" message as defined by the MIDI specification. However,
+ * {@code MidiChannel} adds some "get" methods that retrieve the value most
+ * recently set by one of the standard MIDI channel messages. Similarly, methods
+ * for per-channel solo and mute have been added.
+ * <p>
+ * A {@link Synthesizer} object has a collection of {@code MidiChannels},
+ * usually one for each of the 16 channels prescribed by the MIDI 1.0
+ * specification. The {@code Synthesizer} generates sound when its
+ * {@code MidiChannels} receive {@code noteOn} messages.
  * <p>
  * See the MIDI 1.0 Specification for more information about the prescribed
- * behavior of the MIDI channel messages, which are not exhaustively
- * documented here.  The specification is titled <code>MIDI Reference:
- * The Complete MIDI 1.0 Detailed Specification</code>, and is published by
- * the MIDI Manufacturer's Association (<a href = http://www.midi.org>
- * http://www.midi.org</a>).
+ * behavior of the MIDI channel messages, which are not exhaustively documented
+ * here. The specification is titled
+ * {@code MIDI Reference: The Complete MIDI 1.0 Detailed Specification}, and is
+ * published by the MIDI Manufacturer's Association
+ * (<a href = http://www.midi.org>http://www.midi.org</a>).
  * <p>
  * MIDI was originally a protocol for reporting the gestures of a keyboard
- * musician.  This genesis is visible in the <code>MidiChannel</code> API, which
+ * musician. This genesis is visible in the {@code MidiChannel} API, which
  * preserves such MIDI concepts as key number, key velocity, and key pressure.
  * It should be understood that the MIDI data does not necessarily originate
  * with a keyboard player (the source could be a different kind of musician, or
- * software).  Some devices might generate constant values for velocity
- * and pressure, regardless of how the note was performed.
- * Also, the MIDI specification often leaves it up to the
- * synthesizer to use the data in the way the implementor sees fit.  For
- * example, velocity data need not always be mapped to volume and/or brightness.
- *
- * @see Synthesizer#getChannels
+ * software). Some devices might generate constant values for velocity and
+ * pressure, regardless of how the note was performed. Also, the MIDI
+ * specification often leaves it up to the synthesizer to use the data in the
+ * way the implementor sees fit. For example, velocity data need not always be
+ * mapped to volume and/or brightness.
  *
  * @author David Rivas
  * @author Kara Kytle
+ * @see Synthesizer#getChannels
  */
-
 public interface MidiChannel {
 
     /**
-     * Starts the specified note sounding.  The key-down velocity
-     * usually controls the note's volume and/or brightness.
-     * If <code>velocity</code> is zero, this method instead acts like
-     * {@link #noteOff(int)}, terminating the note.
+     * Starts the specified note sounding. The key-down velocity usually
+     * controls the note's volume and/or brightness. If {@code velocity} is
+     * zero, this method instead acts like {@link #noteOff(int)}, terminating
+     * the note.
      *
      * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C)
      * @param velocity the speed with which the key was depressed
-     *
      * @see #noteOff(int, int)
      */
-    public void noteOn(int noteNumber, int velocity);
+    void noteOn(int noteNumber, int velocity);
 
     /**
-     * Turns the specified note off.  The key-up velocity, if not ignored, can
-     * be used to affect how quickly the note decays.
-     * In any case, the note might not die away instantaneously; its decay
-     * rate is determined by the internals of the <code>Instrument</code>.
-     * If the Hold Pedal (a controller; see
-     * {@link #controlChange(int, int) controlChange})
-     * is down, the effect of this method is deferred until the pedal is
-     * released.
-     *
+     * Turns the specified note off. The key-up velocity, if not ignored, can be
+     * used to affect how quickly the note decays. In any case, the note might
+     * not die away instantaneously; its decay rate is determined by the
+     * internals of the {@code Instrument}. If the Hold Pedal (a controller; see
+     * {@link #controlChange(int, int) controlChange}) is down, the effect of
+     * this method is deferred until the pedal is released.
      *
      * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C)
      * @param velocity the speed with which the key was released
-     *
      * @see #noteOff(int)
      * @see #noteOn
      * @see #allNotesOff
      * @see #allSoundOff
      */
-    public void noteOff(int noteNumber, int velocity);
+    void noteOff(int noteNumber, int velocity);
 
     /**
      * Turns the specified note off.
      *
      * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C)
-     *
      * @see #noteOff(int, int)
      */
-    public void noteOff(int noteNumber);
+    void noteOff(int noteNumber);
 
     /**
-     * Reacts to a change in the specified note's key pressure.
-     * Polyphonic key pressure
-     * allows a keyboard player to press multiple keys simultaneously, each
-     * with a different amount of pressure.  The pressure, if not ignored,
-     * is typically used to vary such features as the volume, brightness,
-     * or vibrato of the note.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support this MIDI message. In order
-     * to verify that <code>setPolyPressure</code>
-     * was successful, use <code>getPolyPressure</code>.
+     * Reacts to a change in the specified note's key pressure. Polyphonic key
+     * pressure allows a keyboard player to press multiple keys simultaneously,
+     * each with a different amount of pressure. The pressure, if not ignored,
+     * is typically used to vary such features as the volume, brightness, or
+     * vibrato of the note.
+     * <p>
+     * It is possible that the underlying synthesizer does not support this MIDI
+     * message. In order to verify that {@code setPolyPressure} was successful,
+     * use {@code getPolyPressure}.
      *
      * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C)
-     * @param pressure value for the specified key, from 0 to 127 (127 =
-     * maximum pressure)
-     *
+     * @param  pressure value for the specified key, from 0 to 127
+     *         (127 = maximum pressure)
      * @see #getPolyPressure(int)
      */
-    public void setPolyPressure(int noteNumber, int pressure);
+    void setPolyPressure(int noteNumber, int pressure);
 
     /**
      * Obtains the pressure with which the specified key is being depressed.
+     * <p>
+     * If the device does not support setting poly pressure, this method always
+     * returns 0. Calling {@code setPolyPressure} will have no effect then.
      *
      * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C)
-     *
-     * If the device does not support setting poly pressure,
-     * this method always returns 0. Calling
-     * <code>setPolyPressure</code> will have no effect then.
-     *
      * @return the amount of pressure for that note, from 0 to 127
      * (127 = maximum pressure)
-     *
      * @see #setPolyPressure(int, int)
      */
-    public int getPolyPressure(int noteNumber);
+    int getPolyPressure(int noteNumber);
 
     /**
-     * Reacts to a change in the keyboard pressure.  Channel
-     * pressure indicates how hard the keyboard player is depressing
-     * the entire keyboard.  This can be the maximum or
-     * average of the per-key pressure-sensor values, as set by
-     * <code>setPolyPressure</code>.  More commonly, it is a measurement of
-     * a single sensor on a device that doesn't implement polyphonic key
-     * pressure.  Pressure can be used to control various aspects of the sound,
-     * as described under {@link #setPolyPressure(int, int) setPolyPressure}.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support this MIDI message. In order
-     * to verify that <code>setChannelPressure</code>
-     * was successful, use <code>getChannelPressure</code>.
+     * Reacts to a change in the keyboard pressure. Channel pressure indicates
+     * how hard the keyboard player is depressing the entire keyboard. This can
+     * be the maximum or average of the per-key pressure-sensor values, as set
+     * by {@code setPolyPressure}. More commonly, it is a measurement of a
+     * single sensor on a device that doesn't implement polyphonic key pressure.
+     * Pressure can be used to control various aspects of the sound, as
+     * described under {@link #setPolyPressure(int, int) setPolyPressure}.
+     * <p>
+     * It is possible that the underlying synthesizer does not support this MIDI
+     * message. In order to verify that {@code setChannelPressure} was
+     * successful, use {@code getChannelPressure}.
      *
      * @param pressure the pressure with which the keyboard is being depressed,
      * from 0 to 127 (127 = maximum pressure)
      * @see #setPolyPressure(int, int)
      * @see #getChannelPressure
      */
-    public void setChannelPressure(int pressure);
+    void setChannelPressure(int pressure);
 
     /**
      * Obtains the channel's keyboard pressure.
-     * If the device does not support setting channel pressure,
-     * this method always returns 0. Calling
-     * <code>setChannelPressure</code> will have no effect then.
-     *
-     * @return the amount of pressure for that note,
-     *         from 0 to 127 (127 = maximum pressure)
+     * <p>
+     * If the device does not support setting channel pressure, this method
+     * always returns 0. Calling {@code setChannelPressure} will have no effect
+     * then.
      *
+     * @return the amount of pressure for that note, from 0 to 127
+     *         (127 = maximum pressure)
      * @see #setChannelPressure(int)
      */
-    public int getChannelPressure();
+    int getChannelPressure();
 
     /**
-     * Reacts to a change in the specified controller's value.  A controller
-     * is some control other than a keyboard key, such as a
-     * switch, slider, pedal, wheel, or breath-pressure sensor.
-     * The MIDI 1.0 Specification provides standard numbers for typical
-     * controllers on MIDI devices, and describes the intended effect
-     * for some of the controllers.
-     * The way in which an
-     * <code>Instrument</code> reacts to a controller change may be
-     * specific to the <code>Instrument</code>.
-     * <p>
-     * The MIDI 1.0 Specification defines both 7-bit controllers
-     * and 14-bit controllers.  Continuous controllers, such
-     * as wheels and sliders, typically have 14 bits (two MIDI bytes),
-     * while discrete controllers, such as switches, typically have 7 bits
-     * (one MIDI byte).  Refer to the specification to see the
-     * expected resolution for each type of control.
-     * <p>
-     * Controllers 64 through 95 (0x40 - 0x5F) allow 7-bit precision.
-     * The value of a 7-bit controller is set completely by the
-     * <code>value</code> argument.  An additional set of controllers
-     * provide 14-bit precision by using two controller numbers, one
-     * for the most significant 7 bits and another for the least significant
-     * 7 bits.  Controller numbers 0 through 31 (0x00 - 0x1F) control the
-     * most significant 7 bits of 14-bit controllers; controller numbers
-     * 32 through 63 (0x20 - 0x3F) control the least significant 7 bits of
-     * these controllers.  For example, controller number 7 (0x07) controls
-     * the upper 7 bits of the channel volume controller, and controller
-     * number 39 (0x27) controls the lower 7 bits.
-     * The value of a 14-bit controller is determined
-     * by the interaction of the two halves.  When the most significant 7 bits
-     * of a controller are set (using controller numbers 0 through 31), the
-     * lower 7 bits are automatically set to 0.  The corresponding controller
-     * number for the lower 7 bits may then be used to further modulate the
-     * controller value.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support a specific controller message. In order
-     * to verify that a call to <code>controlChange</code>
-     * was successful, use <code>getController</code>.
-     *
-     * @param controller the controller number (0 to 127; see the MIDI
-     * 1.0 Specification for the interpretation)
-     * @param value the value to which the specified controller is changed (0 to 127)
-     *
+     * Reacts to a change in the specified controller's value. A controller is
+     * some control other than a keyboard key, such as a switch, slider, pedal,
+     * wheel, or breath-pressure sensor. The MIDI 1.0 Specification provides
+     * standard numbers for typical controllers on MIDI devices, and describes
+     * the intended effect for some of the controllers. The way in which an
+     * {@code Instrument} reacts to a controller change may be specific to the
+     * {@code Instrument}.
+     * <p>
+     * The MIDI 1.0 Specification defines both 7-bit controllers and 14-bit
+     * controllers. Continuous controllers, such as wheels and sliders,
+     * typically have 14 bits (two MIDI bytes), while discrete controllers, such
+     * as switches, typically have 7 bits (one MIDI byte). Refer to the
+     * specification to see the expected resolution for each type of control.
+     * <p>
+     * Controllers 64 through 95 (0x40 - 0x5F) allow 7-bit precision. The value
+     * of a 7-bit controller is set completely by the {@code value} argument. An
+     * additional set of controllers provide 14-bit precision by using two
+     * controller numbers, one for the most significant 7 bits and another for
+     * the least significant 7 bits. Controller numbers 0 through 31
+     * (0x00 - 0x1F) control the most significant 7 bits of 14-bit controllers;
+     * controller numbers 32 through 63 (0x20 - 0x3F) control the least
+     * significant 7 bits of these controllers. For example, controller number 7
+     * (0x07) controls the upper 7 bits of the channel volume controller, and
+     * controller number 39 (0x27) controls the lower 7 bits. The value of a
+     * 14-bit controller is determined by the interaction of the two halves.
+     * When the most significant 7 bits of a controller are set (using
+     * controller numbers 0 through 31), the lower 7 bits are automatically set
+     * to 0. The corresponding controller number for the lower 7 bits may then
+     * be used to further modulate the controller value.
+     * <p>
+     * It is possible that the underlying synthesizer does not support a
+     * specific controller message. In order to verify that a call to
+     * {@code controlChange} was successful, use {@code getController}.
+     *
+     * @param  controller the controller number (0 to 127; see the MIDI 1.0
+     *         Specification for the interpretation)
+     * @param  value the value to which the specified controller is changed
+     *         (0 to 127)
      * @see #getController(int)
      */
-    public void controlChange(int controller, int value);
+    void controlChange(int controller, int value);
 
     /**
-     * Obtains the current value of the specified controller.  The return
-     * value is represented with 7 bits. For 14-bit controllers, the MSB and
-     * LSB controller value needs to be obtained separately. For example,
-     * the 14-bit value of the volume controller can be calculated by
-     * multiplying the value of controller 7 (0x07, channel volume MSB)
-     * with 128 and adding the
-     * value of controller 39 (0x27, channel volume LSB).
-     *
-     * If the device does not support setting a specific controller,
-     * this method returns 0 for that controller.
-     * Calling <code>controlChange</code> will have no effect then.
+     * Obtains the current value of the specified controller. The return value
+     * is represented with 7 bits. For 14-bit controllers, the MSB and LSB
+     * controller value needs to be obtained separately. For example, the 14-bit
+     * value of the volume controller can be calculated by multiplying the value
+     * of controller 7 (0x07, channel volume MSB) with 128 and adding the value
+     * of controller 39 (0x27, channel volume LSB).
+     * <p>
+     * If the device does not support setting a specific controller, this method
+     * returns 0 for that controller. Calling {@code controlChange} will have no
+     * effect then.
      *
      * @param controller the number of the controller whose value is desired.
-     * The allowed range is 0-127; see the MIDI
-     * 1.0 Specification for the interpretation.
-     *
+     *         The allowed range is 0-127; see the MIDI 1.0 Specification for
+     *         the interpretation.
      * @return the current value of the specified controller (0 to 127)
-     *
      * @see #controlChange(int, int)
      */
-    public int getController(int controller);
+    int getController(int controller);
 
     /**
-     * Changes a program (patch).  This selects a specific
-     * instrument from the currently selected bank of instruments.
+     * Changes a program (patch). This selects a specific instrument from the
+     * currently selected bank of instruments.
      * <p>
-     * The MIDI specification does not
-     * dictate whether notes that are already sounding should switch
-     * to the new instrument (timbre) or continue with their original timbre
-     * until terminated by a note-off.
+     * The MIDI specification does not dictate whether notes that are already
+     * sounding should switch to the new instrument (timbre) or continue with
+     * their original timbre until terminated by a note-off.
      * <p>
-     * The program number is zero-based (expressed from 0 to 127).
-     * Note that MIDI hardware displays and literature about MIDI
-     * typically use the range 1 to 128 instead.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support a specific program. In order
-     * to verify that a call to <code>programChange</code>
-     * was successful, use <code>getProgram</code>.
+     * The program number is zero-based (expressed from 0 to 127). Note that
+     * MIDI hardware displays and literature about MIDI typically use the range
+     * 1 to 128 instead.
+     * <p>
+     * It is possible that the underlying synthesizer does not support a
+     * specific program. In order to verify that a call to {@code programChange}
+     * was successful, use {@code getProgram}.
      *
      * @param program the program number to switch to (0 to 127)
-     *
      * @see #programChange(int, int)
      * @see #getProgram()
      */
-    public void programChange(int program);
+    void programChange(int program);
 
     /**
      * Changes the program using bank and program (patch) numbers.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support a specific bank, or program. In order
-     * to verify that a call to <code>programChange</code>
-     * was successful, use <code>getProgram</code> and
-     * <code>getController</code>.
-     * Since banks are changed by way of control changes,
-     * you can verify the current bank with the following
-     * statement:
+     * <p>
+     * It is possible that the underlying synthesizer does not support a
+     * specific bank, or program. In order to verify that a call to
+     * {@code programChange} was successful, use {@code getProgram} and
+     * {@code getController}. Since banks are changed by way of control changes,
+     * you can verify the current bank with the following statement:
      * <pre>
-     *   int bank = (getController(0) * 128)
-     *              + getController(32);
+     *   int bank = (getController(0) * 128) + getController(32);
      * </pre>
      *
      * @param bank the bank number to switch to (0 to 16383)
-     * @param program the program (patch) to use in the specified bank (0 to 127)
+     * @param  program the program (patch) to use in the specified bank
+     *         (0 to 127)
      * @see #programChange(int)
      * @see #getProgram()
      */
-    public void programChange(int bank, int program);
+    void programChange(int bank, int program);
 
     /**
      * Obtains the current program number for this channel.
+     *
      * @return the program number of the currently selected patch
      * @see Patch#getProgram
      * @see Synthesizer#loadInstrument
      * @see #programChange(int)
      */
-    public int getProgram();
+    int getProgram();
 
     /**
-     * Changes the pitch offset for all notes on this channel.
-     * This affects all currently sounding notes as well as subsequent ones.
-     * (For pitch bend to cease, the value needs to be reset to the
-     * center position.)
-     * <p> The MIDI specification
-     * stipulates that pitch bend be a 14-bit value, where zero
-     * is maximum downward bend, 16383 is maximum upward bend, and
-     * 8192 is the center (no pitch bend).  The actual
-     * amount of pitch change is not specified; it can be changed by
-     * a pitch-bend sensitivity setting.  However, the General MIDI
-     * specification says that the default range should be two semitones
-     * up and down from center.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support this MIDI message. In order
-     * to verify that <code>setPitchBend</code>
-     * was successful, use <code>getPitchBend</code>.
+     * Changes the pitch offset for all notes on this channel. This affects all
+     * currently sounding notes as well as subsequent ones. (For pitch bend to
+     * cease, the value needs to be reset to the center position.)
+     * <p>
+     * The MIDI specification stipulates that pitch bend be a 14-bit value,
+     * where zero is maximum downward bend, 16383 is maximum upward bend, and
+     * 8192 is the center (no pitch bend). The actual amount of pitch change is
+     * not specified; it can be changed by a pitch-bend sensitivity setting.
+     * However, the General MIDI specification says that the default range
+     * should be two semitones up and down from center.
+     * <p>
+     * It is possible that the underlying synthesizer does not support this MIDI
+     * message. In order to verify that {@code setPitchBend} was successful, use
+     * {@code getPitchBend}.
      *
      * @param bend the amount of pitch change, as a nonnegative 14-bit value
      * (8192 = no bend)
-     *
      * @see #getPitchBend
      */
-    public void setPitchBend(int bend);
+    void setPitchBend(int bend);
 
     /**
-     * Obtains the upward or downward pitch offset for this channel.
-     * If the device does not support setting pitch bend,
-     * this method always returns 8192. Calling
-     * <code>setPitchBend</code> will have no effect then.
+     * Obtains the upward or downward pitch offset for this channel. If the
+     * device does not support setting pitch bend, this method always returns
+     * 8192. Calling {@code setPitchBend} will have no effect then.
      *
      * @return bend amount, as a nonnegative 14-bit value (8192 = no bend)
-     *
      * @see #setPitchBend(int)
      */
-    public int getPitchBend();
+    int getPitchBend();
 
     /**
      * Resets all the implemented controllers to their default values.
      *
      * @see #controlChange(int, int)
      */
-    public void resetAllControllers();
+    void resetAllControllers();
 
     /**
-     * Turns off all notes that are currently sounding on this channel.
-     * The notes might not die away instantaneously; their decay
-     * rate is determined by the internals of the <code>Instrument</code>.
-     * If the Hold Pedal controller (see
-     * {@link #controlChange(int, int) controlChange})
-     * is down, the effect of this method is deferred until the pedal is
-     * released.
+     * Turns off all notes that are currently sounding on this channel. The
+     * notes might not die away instantaneously; their decay rate is determined
+     * by the internals of the {@code Instrument}. If the Hold Pedal controller
+     * (see {@link #controlChange(int, int) controlChange}) is down, the effect
+     * of this method is deferred until the pedal is released.
      *
      * @see #allSoundOff
      * @see #noteOff(int)
      */
-    public void allNotesOff();
+    void allNotesOff();
 
     /**
      * Immediately turns off all sounding notes on this channel, ignoring the
      * state of the Hold Pedal and the internal decay rate of the current
-     * <code>Instrument</code>.
+     * {@code Instrument}.
      *
      * @see #allNotesOff
      */
-    public void allSoundOff();
+    void allSoundOff();
 
     /**
-     * Turns local control on or off.  The default is for local control
-     * to be on.  The "on" setting means that if a device is capable
-     * of both synthesizing sound and transmitting MIDI messages,
-     * it will synthesize sound in response to the note-on and
-     * note-off messages that it itself transmits.  It will also respond
-     * to messages received from other transmitting devices.
-     * The "off" setting means that the synthesizer will ignore its
-     * own transmitted MIDI messages, but not those received from other devices.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support local control. In order
-     * to verify that a call to <code>localControl</code>
-     * was successful, check the return value.
-     *
-     * @param on <code>true</code> to turn local control on, <code>false</code>
-     *  to turn local control off
-     * @return the new local-control value, or false
-     *         if local control is not supported
-     *
-     */
-    public boolean localControl(boolean on);
-
-    /**
-     * Turns mono mode on or off.  In mono mode, the channel synthesizes
-     * only one note at a time.  In poly mode (identical to mono mode off),
-     * the channel can synthesize multiple notes simultaneously.
-     * The default is mono off (poly mode on).
-     * <p>
-     * "Mono" is short for the word "monophonic," which in this context
-     * is opposed to the word "polyphonic" and refers to a single synthesizer
-     * voice per MIDI channel.  It
-     * has nothing to do with how many audio channels there might be
-     * (as in "monophonic" versus "stereophonic" recordings).
-     *
-     * It is possible that the underlying synthesizer
-     * does not support mono mode. In order
-     * to verify that a call to <code>setMono</code>
-     * was successful, use <code>getMono</code>.
-     *
-     * @param on <code>true</code> to turn mono mode on, <code>false</code> to
-     * turn it off (which means turning poly mode on).
+     * Turns local control on or off. The default is for local control to be on.
+     * The "on" setting means that if a device is capable of both synthesizing
+     * sound and transmitting MIDI messages, it will synthesize sound in
+     * response to the note-on and note-off messages that it itself transmits.
+     * It will also respond to messages received from other transmitting
+     * devices. The "off" setting means that the synthesizer will ignore its own
+     * transmitted MIDI messages, but not those received from other devices.
+     * <p>
+     * It is possible that the underlying synthesizer does not support local
+     * control. In order to verify that a call to {@code localControl} was
+     * successful, check the return value.
+     *
+     * @param  on {@code true} to turn local control on, {@code false} to turn
+     *         local control off
+     * @return the new local-control value, or false if local control is not
+     *         supported
+     */
+    boolean localControl(boolean on);
+
+    /**
+     * Turns mono mode on or off. In mono mode, the channel synthesizes only one
+     * note at a time. In poly mode (identical to mono mode off), the channel
+     * can synthesize multiple notes simultaneously. The default is mono off
+     * (poly mode on).
+     * <p>
+     * "Mono" is short for the word "monophonic," which in this context is
+     * opposed to the word "polyphonic" and refers to a single synthesizer voice
+     * per MIDI channel. It has nothing to do with how many audio channels there
+     * might be (as in "monophonic" versus "stereophonic" recordings).
+     * <p>
+     * It is possible that the underlying synthesizer does not support mono
+     * mode. In order to verify that a call to {@code setMono} was successful,
+     * use {@code getMono}.
      *
+     * @param  on {@code true} to turn mono mode on, {@code false} to turn it
+     *         off (which means turning poly mode on)
      * @see #getMono
      * @see VoiceStatus
      */
-    public void setMono(boolean on);
+    void setMono(boolean on);
 
     /**
-     * Obtains the current mono/poly mode.
-     * Synthesizers that do not allow changing mono/poly mode
-     * will always return the same value, regardless
-     * of calls to <code>setMono</code>.
-     * @return <code>true</code> if mono mode is on, otherwise
-     * <code>false</code> (meaning poly mode is on).
+     * Obtains the current mono/poly mode. Synthesizers that do not allow
+     * changing mono/poly mode will always return the same value, regardless of
+     * calls to {@code setMono}.
      *
+     * @return {@code true} if mono mode is on, otherwise {@code false} (meaning
+     *         poly mode is on)
      * @see #setMono(boolean)
      */
-    public boolean getMono();
+    boolean getMono();
 
     /**
-     * Turns omni mode on or off.  In omni mode, the channel responds
-     * to messages sent on all channels.  When omni is off, the channel
-     * responds only to messages sent on its channel number.
-     * The default is omni off.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support omni mode. In order
-     * to verify that <code>setOmni</code>
-     * was successful, use <code>getOmni</code>.
-     *
-     * @param on <code>true</code> to turn omni mode on, <code>false</code> to
-     * turn it off.
+     * Turns omni mode on or off. In omni mode, the channel responds to messages
+     * sent on all channels. When omni is off, the channel responds only to
+     * messages sent on its channel number. The default is omni off.
+     * <p>
+     * It is possible that the underlying synthesizer does not support omni
+     * mode. In order to verify that {@code setOmni} was successful, use
+     * {@code getOmni}.
      *
+     * @param  on {@code true} to turn omni mode on, {@code false} to turn it
+     *         off
      * @see #getOmni
      * @see VoiceStatus
      */
-    public void setOmni(boolean on);
+    void setOmni(boolean on);
 
     /**
-     * Obtains the current omni mode.
-     * Synthesizers that do not allow changing the omni mode
-     * will always return the same value, regardless
-     * of calls to <code>setOmni</code>.
-     * @return <code>true</code> if omni mode is on, otherwise
-     * <code>false</code> (meaning omni mode is off).
+     * Obtains the current omni mode. Synthesizers that do not allow changing
+     * the omni mode will always return the same value, regardless of calls to
+     * {@code setOmni}.
      *
+     * @return {@code true} if omni mode is on, otherwise {@code false} (meaning
+     *         omni mode is off)
      * @see #setOmni(boolean)
      */
-    public boolean getOmni();
+    boolean getOmni();
 
     /**
-     * Sets the mute state for this channel. A value of
-     * <code>true</code> means the channel is to be muted, <code>false</code>
-     * means the channel can sound (if other channels are not soloed).
-     * <p>
-     * Unlike {@link #allSoundOff()}, this method
-     * applies to only a specific channel, not to all channels.  Further, it
-     * silences not only currently sounding notes, but also subsequently
-     * received notes.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support muting channels. In order
-     * to verify that a call to <code>setMute</code>
-     * was successful, use <code>getMute</code>.
+     * Sets the mute state for this channel. A value of {@code true} means the
+     * channel is to be muted, {@code false} means the channel can sound (if
+     * other channels are not soloed).
+     * <p>
+     * Unlike {@link #allSoundOff()}, this method applies to only a specific
+     * channel, not to all channels. Further, it silences not only currently
+     * sounding notes, but also subsequently received notes.
+     * <p>
+     * It is possible that the underlying synthesizer does not support muting
+     * channels. In order to verify that a call to {@code setMute} was
+     * successful, use {@code getMute}.
      *
      * @param mute the new mute state
-     *
      * @see #getMute
      * @see #setSolo(boolean)
      */
-    public void setMute(boolean mute);
+    void setMute(boolean mute);
 
     /**
-     * Obtains the current mute state for this channel.
-     * If the underlying synthesizer does not support
-     * muting this channel, this method always returns
-     * <code>false</code>.
-     *
-     * @return <code>true</code> the channel is muted,
-     *         or <code>false</code> if not
+     * Obtains the current mute state for this channel. If the underlying
+     * synthesizer does not support muting this channel, this method always
+     * returns {@code false}.
      *
+     * @return {@code true} the channel is muted, or {@code false} if not
      * @see #setMute(boolean)
      */
-    public boolean getMute();
+    boolean getMute();
 
     /**
-     * Sets the solo state for this channel.
-     * If <code>solo</code> is <code>true</code> only this channel
-     * and other soloed channels will sound. If <code>solo</code>
-     * is <code>false</code> then only other soloed channels will
-     * sound, unless no channels are soloed, in which case all
-     * unmuted channels will sound.
-     *
-     * It is possible that the underlying synthesizer
-     * does not support solo channels. In order
-     * to verify that a call to <code>setSolo</code>
-     * was successful, use <code>getSolo</code>.
+     * Sets the solo state for this channel. If {@code solo} is {@code true}
+     * only this channel and other soloed channels will sound. If {@code solo}
+     * is {@code false} then only other soloed channels will sound, unless no
+     * channels are soloed, in which case all unmuted channels will sound.
+     * <p>
+     * It is possible that the underlying synthesizer does not support solo
+     * channels. In order to verify that a call to {@code setSolo} was
+     * successful, use {@code getSolo}.
      *
      * @param soloState new solo state for the channel
      * @see #getSolo()
      */
-    public void setSolo(boolean soloState);
+    void setSolo(boolean soloState);
 
     /**
-     * Obtains the current solo state for this channel.
-     * If the underlying synthesizer does not support
-     * solo on this channel, this method always returns
-     * <code>false</code>.
-     *
-     * @return <code>true</code> the channel is solo,
-     *         or <code>false</code> if not
+     * Obtains the current solo state for this channel. If the underlying
+     * synthesizer does not support solo on this channel, this method always
+     * returns {@code false}.
      *
+     * @return {@code true} the channel is solo, or {@code false} if not
      * @see #setSolo(boolean)
      */
-    public boolean getSolo();
+    boolean getSolo();
 }