J. Duke | 319a3b9 | 2007-12-01 00:00:00 +0000 | [diff] [blame^] | 1 | /* |
| 2 | * Copyright 1998-2004 Sun Microsystems, Inc. All Rights Reserved. |
| 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| 4 | * |
| 5 | * This code is free software; you can redistribute it and/or modify it |
| 6 | * under the terms of the GNU General Public License version 2 only, as |
| 7 | * published by the Free Software Foundation. Sun designates this |
| 8 | * particular file as subject to the "Classpath" exception as provided |
| 9 | * by Sun in the LICENSE file that accompanied this code. |
| 10 | * |
| 11 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| 12 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| 13 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| 14 | * version 2 for more details (a copy is included in the LICENSE file that |
| 15 | * accompanied this code). |
| 16 | * |
| 17 | * You should have received a copy of the GNU General Public License version |
| 18 | * 2 along with this work; if not, write to the Free Software Foundation, |
| 19 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| 20 | * |
| 21 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| 22 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| 23 | * have any questions. |
| 24 | */ |
| 25 | |
| 26 | package javax.sound.midi; |
| 27 | |
| 28 | |
| 29 | /** |
| 30 | * A <code>MidiChannel</code> object represents a single MIDI channel. |
| 31 | * Generally, each <code>MidiChannel</code> method processes a like-named MIDI |
| 32 | * "channel voice" or "channel mode" message as defined by the MIDI specification. However, |
| 33 | * <code>MidiChannel</code> adds some "get" methods that retrieve the value |
| 34 | * most recently set by one of the standard MIDI channel messages. Similarly, |
| 35 | * methods for per-channel solo and mute have been added. |
| 36 | * <p> |
| 37 | * A <code>{@link Synthesizer}</code> object has a collection |
| 38 | * of <code>MidiChannels</code>, usually one for each of the 16 channels |
| 39 | * prescribed by the MIDI 1.0 specification. The <code>Synthesizer</code> |
| 40 | * generates sound when its <code>MidiChannels</code> receive |
| 41 | * <code>noteOn</code> messages. |
| 42 | * <p> |
| 43 | * See the MIDI 1.0 Specification for more information about the prescribed |
| 44 | * behavior of the MIDI channel messages, which are not exhaustively |
| 45 | * documented here. The specification is titled <code>MIDI Reference: |
| 46 | * The Complete MIDI 1.0 Detailed Specification</code>, and is published by |
| 47 | * the MIDI Manufacturer's Association (<a href = http://www.midi.org> |
| 48 | * http://www.midi.org</a>). |
| 49 | * <p> |
| 50 | * MIDI was originally a protocol for reporting the gestures of a keyboard |
| 51 | * musician. This genesis is visible in the <code>MidiChannel</code> API, which |
| 52 | * preserves such MIDI concepts as key number, key velocity, and key pressure. |
| 53 | * It should be understood that the MIDI data does not necessarily originate |
| 54 | * with a keyboard player (the source could be a different kind of musician, or |
| 55 | * software). Some devices might generate constant values for velocity |
| 56 | * and pressure, regardless of how the note was performed. |
| 57 | * Also, the MIDI specification often leaves it up to the |
| 58 | * synthesizer to use the data in the way the implementor sees fit. For |
| 59 | * example, velocity data need not always be mapped to volume and/or brightness. |
| 60 | * |
| 61 | * @see Synthesizer#getChannels |
| 62 | * |
| 63 | * @author David Rivas |
| 64 | * @author Kara Kytle |
| 65 | */ |
| 66 | |
| 67 | public interface MidiChannel { |
| 68 | |
| 69 | /** |
| 70 | * Starts the specified note sounding. The key-down velocity |
| 71 | * usually controls the note's volume and/or brightness. |
| 72 | * If <code>velocity</code> is zero, this method instead acts like |
| 73 | * {@link #noteOff(int)}, terminating the note. |
| 74 | * |
| 75 | * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C) |
| 76 | * @param velocity the speed with which the key was depressed |
| 77 | * |
| 78 | * @see #noteOff(int, int) |
| 79 | */ |
| 80 | public void noteOn(int noteNumber, int velocity); |
| 81 | |
| 82 | /** |
| 83 | * Turns the specified note off. The key-up velocity, if not ignored, can |
| 84 | * be used to affect how quickly the note decays. |
| 85 | * In any case, the note might not die away instantaneously; its decay |
| 86 | * rate is determined by the internals of the <code>Instrument</code>. |
| 87 | * If the Hold Pedal (a controller; see |
| 88 | * {@link #controlChange(int, int) controlChange}) |
| 89 | * is down, the effect of this method is deferred until the pedal is |
| 90 | * released. |
| 91 | * |
| 92 | * |
| 93 | * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C) |
| 94 | * @param velocity the speed with which the key was released |
| 95 | * |
| 96 | * @see #noteOff(int) |
| 97 | * @see #noteOn |
| 98 | * @see #allNotesOff |
| 99 | * @see #allSoundOff |
| 100 | */ |
| 101 | public void noteOff(int noteNumber, int velocity); |
| 102 | |
| 103 | /** |
| 104 | * Turns the specified note off. |
| 105 | * |
| 106 | * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C) |
| 107 | * |
| 108 | * @see #noteOff(int, int) |
| 109 | */ |
| 110 | public void noteOff(int noteNumber); |
| 111 | |
| 112 | /** |
| 113 | * Reacts to a change in the specified note's key pressure. |
| 114 | * Polyphonic key pressure |
| 115 | * allows a keyboard player to press multiple keys simultaneously, each |
| 116 | * with a different amount of pressure. The pressure, if not ignored, |
| 117 | * is typically used to vary such features as the volume, brightness, |
| 118 | * or vibrato of the note. |
| 119 | * |
| 120 | * It is possible that the underlying synthesizer |
| 121 | * does not support this MIDI message. In order |
| 122 | * to verify that <code>setPolyPressure</code> |
| 123 | * was successful, use <code>getPolyPressure</code>. |
| 124 | * |
| 125 | * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C) |
| 126 | * @param pressure value for the specified key, from 0 to 127 (127 = |
| 127 | * maximum pressure) |
| 128 | * |
| 129 | * @see #getPolyPressure(int) |
| 130 | */ |
| 131 | public void setPolyPressure(int noteNumber, int pressure); |
| 132 | |
| 133 | /** |
| 134 | * Obtains the pressure with which the specified key is being depressed. |
| 135 | * |
| 136 | * @param noteNumber the MIDI note number, from 0 to 127 (60 = Middle C) |
| 137 | * |
| 138 | * If the device does not support setting poly pressure, |
| 139 | * this method always returns 0. Calling |
| 140 | * <code>setPolyPressure</code> will have no effect then. |
| 141 | * |
| 142 | * @return the amount of pressure for that note, from 0 to 127 |
| 143 | * (127 = maximum pressure) |
| 144 | * |
| 145 | * @see #setPolyPressure(int, int) |
| 146 | */ |
| 147 | public int getPolyPressure(int noteNumber); |
| 148 | |
| 149 | /** |
| 150 | * Reacts to a change in the keyboard pressure. Channel |
| 151 | * pressure indicates how hard the keyboard player is depressing |
| 152 | * the entire keyboard. This can be the maximum or |
| 153 | * average of the per-key pressure-sensor values, as set by |
| 154 | * <code>setPolyPressure</code>. More commonly, it is a measurement of |
| 155 | * a single sensor on a device that doesn't implement polyphonic key |
| 156 | * pressure. Pressure can be used to control various aspects of the sound, |
| 157 | * as described under {@link #setPolyPressure(int, int) setPolyPressure}. |
| 158 | * |
| 159 | * It is possible that the underlying synthesizer |
| 160 | * does not support this MIDI message. In order |
| 161 | * to verify that <code>setChannelPressure</code> |
| 162 | * was successful, use <code>getChannelPressure</code>. |
| 163 | * |
| 164 | * @param pressure the pressure with which the keyboard is being depressed, |
| 165 | * from 0 to 127 (127 = maximum pressure) |
| 166 | * @see #setPolyPressure(int, int) |
| 167 | * @see #getChannelPressure |
| 168 | */ |
| 169 | public void setChannelPressure(int pressure); |
| 170 | |
| 171 | /** |
| 172 | * Obtains the channel's keyboard pressure. |
| 173 | * If the device does not support setting channel pressure, |
| 174 | * this method always returns 0. Calling |
| 175 | * <code>setChannelPressure</code> will have no effect then. |
| 176 | * |
| 177 | * @return the amount of pressure for that note, |
| 178 | * from 0 to 127 (127 = maximum pressure) |
| 179 | * |
| 180 | * @see #setChannelPressure(int) |
| 181 | */ |
| 182 | public int getChannelPressure(); |
| 183 | |
| 184 | /** |
| 185 | * Reacts to a change in the specified controller's value. A controller |
| 186 | * is some control other than a keyboard key, such as a |
| 187 | * switch, slider, pedal, wheel, or breath-pressure sensor. |
| 188 | * The MIDI 1.0 Specification provides standard numbers for typical |
| 189 | * controllers on MIDI devices, and describes the intended effect |
| 190 | * for some of the controllers. |
| 191 | * The way in which an |
| 192 | * <code>Instrument</code> reacts to a controller change may be |
| 193 | * specific to the <code>Instrument</code>. |
| 194 | * <p> |
| 195 | * The MIDI 1.0 Specification defines both 7-bit controllers |
| 196 | * and 14-bit controllers. Continuous controllers, such |
| 197 | * as wheels and sliders, typically have 14 bits (two MIDI bytes), |
| 198 | * while discrete controllers, such as switches, typically have 7 bits |
| 199 | * (one MIDI byte). Refer to the specification to see the |
| 200 | * expected resolution for each type of control. |
| 201 | * <p> |
| 202 | * Controllers 64 through 95 (0x40 - 0x5F) allow 7-bit precision. |
| 203 | * The value of a 7-bit controller is set completely by the |
| 204 | * <code>value</code> argument. An additional set of controllers |
| 205 | * provide 14-bit precision by using two controller numbers, one |
| 206 | * for the most significant 7 bits and another for the least significant |
| 207 | * 7 bits. Controller numbers 0 through 31 (0x00 - 0x1F) control the |
| 208 | * most significant 7 bits of 14-bit controllers; controller numbers |
| 209 | * 32 through 63 (0x20 - 0x3F) control the least significant 7 bits of |
| 210 | * these controllers. For example, controller number 7 (0x07) controls |
| 211 | * the upper 7 bits of the channel volume controller, and controller |
| 212 | * number 39 (0x27) controls the lower 7 bits. |
| 213 | * The value of a 14-bit controller is determined |
| 214 | * by the interaction of the two halves. When the most significant 7 bits |
| 215 | * of a controller are set (using controller numbers 0 through 31), the |
| 216 | * lower 7 bits are automatically set to 0. The corresponding controller |
| 217 | * number for the lower 7 bits may then be used to further modulate the |
| 218 | * controller value. |
| 219 | * |
| 220 | * It is possible that the underlying synthesizer |
| 221 | * does not support a specific controller message. In order |
| 222 | * to verify that a call to <code>controlChange</code> |
| 223 | * was successful, use <code>getController</code>. |
| 224 | * |
| 225 | * @param controller the controller number (0 to 127; see the MIDI |
| 226 | * 1.0 Specification for the interpretation) |
| 227 | * @param value the value to which the specified controller is changed (0 to 127) |
| 228 | * |
| 229 | * @see #getController(int) |
| 230 | */ |
| 231 | public void controlChange(int controller, int value); |
| 232 | |
| 233 | /** |
| 234 | * Obtains the current value of the specified controller. The return |
| 235 | * value is represented with 7 bits. For 14-bit controllers, the MSB and |
| 236 | * LSB controller value needs to be obtained separately. For example, |
| 237 | * the 14-bit value of the volume controller can be calculated by |
| 238 | * multiplying the value of controller 7 (0x07, channel volume MSB) |
| 239 | * with 128 and adding the |
| 240 | * value of controller 39 (0x27, channel volume LSB). |
| 241 | * |
| 242 | * If the device does not support setting a specific controller, |
| 243 | * this method returns 0 for that controller. |
| 244 | * Calling <code>controlChange</code> will have no effect then. |
| 245 | * |
| 246 | * @param controller the number of the controller whose value is desired. |
| 247 | * The allowed range is 0-127; see the MIDI |
| 248 | * 1.0 Specification for the interpretation. |
| 249 | * |
| 250 | * @return the current value of the specified controller (0 to 127) |
| 251 | * |
| 252 | * @see #controlChange(int, int) |
| 253 | */ |
| 254 | public int getController(int controller); |
| 255 | |
| 256 | /** |
| 257 | * Changes a program (patch). This selects a specific |
| 258 | * instrument from the currently selected bank of instruments. |
| 259 | * <p> |
| 260 | * The MIDI specification does not |
| 261 | * dictate whether notes that are already sounding should switch |
| 262 | * to the new instrument (timbre) or continue with their original timbre |
| 263 | * until terminated by a note-off. |
| 264 | * <p> |
| 265 | * The program number is zero-based (expressed from 0 to 127). |
| 266 | * Note that MIDI hardware displays and literature about MIDI |
| 267 | * typically use the range 1 to 128 instead. |
| 268 | * |
| 269 | * It is possible that the underlying synthesizer |
| 270 | * does not support a specific program. In order |
| 271 | * to verify that a call to <code>programChange</code> |
| 272 | * was successful, use <code>getProgram</code>. |
| 273 | * |
| 274 | * @param program the program number to switch to (0 to 127) |
| 275 | * |
| 276 | * @see #programChange(int, int) |
| 277 | * @see #getProgram() |
| 278 | */ |
| 279 | public void programChange(int program); |
| 280 | |
| 281 | /** |
| 282 | * Changes the program using bank and program (patch) numbers. |
| 283 | * |
| 284 | * It is possible that the underlying synthesizer |
| 285 | * does not support a specific bank, or program. In order |
| 286 | * to verify that a call to <code>programChange</code> |
| 287 | * was successful, use <code>getProgram</code> and |
| 288 | * <code>getController</code>. |
| 289 | * Since banks are changed by way of control changes, |
| 290 | * you can verify the current bank with the following |
| 291 | * statement: |
| 292 | * <pre> |
| 293 | * int bank = (getController(0) * 128) |
| 294 | * + getController(32); |
| 295 | * </pre> |
| 296 | * |
| 297 | * @param bank the bank number to switch to (0 to 16383) |
| 298 | * @param program the program (patch) to use in the specified bank (0 to 127) |
| 299 | * @see #programChange(int) |
| 300 | * @see #getProgram() |
| 301 | */ |
| 302 | public void programChange(int bank, int program); |
| 303 | |
| 304 | /** |
| 305 | * Obtains the current program number for this channel. |
| 306 | * @return the program number of the currently selected patch |
| 307 | * @see Patch#getProgram |
| 308 | * @see Synthesizer#loadInstrument |
| 309 | * @see #programChange(int) |
| 310 | */ |
| 311 | public int getProgram(); |
| 312 | |
| 313 | /** |
| 314 | * Changes the pitch offset for all notes on this channel. |
| 315 | * This affects all currently sounding notes as well as subsequent ones. |
| 316 | * (For pitch bend to cease, the value needs to be reset to the |
| 317 | * center position.) |
| 318 | * <p> The MIDI specification |
| 319 | * stipulates that pitch bend be a 14-bit value, where zero |
| 320 | * is maximum downward bend, 16383 is maximum upward bend, and |
| 321 | * 8192 is the center (no pitch bend). The actual |
| 322 | * amount of pitch change is not specified; it can be changed by |
| 323 | * a pitch-bend sensitivity setting. However, the General MIDI |
| 324 | * specification says that the default range should be two semitones |
| 325 | * up and down from center. |
| 326 | * |
| 327 | * It is possible that the underlying synthesizer |
| 328 | * does not support this MIDI message. In order |
| 329 | * to verify that <code>setPitchBend</code> |
| 330 | * was successful, use <code>getPitchBend</code>. |
| 331 | * |
| 332 | * @param bend the amount of pitch change, as a nonnegative 14-bit value |
| 333 | * (8192 = no bend) |
| 334 | * |
| 335 | * @see #getPitchBend |
| 336 | */ |
| 337 | public void setPitchBend(int bend); |
| 338 | |
| 339 | /** |
| 340 | * Obtains the upward or downward pitch offset for this channel. |
| 341 | * If the device does not support setting pitch bend, |
| 342 | * this method always returns 8192. Calling |
| 343 | * <code>setPitchBend</code> will have no effect then. |
| 344 | * |
| 345 | * @return bend amount, as a nonnegative 14-bit value (8192 = no bend) |
| 346 | * |
| 347 | * @see #setPitchBend(int) |
| 348 | */ |
| 349 | public int getPitchBend(); |
| 350 | |
| 351 | /** |
| 352 | * Resets all the implemented controllers to their default values. |
| 353 | * |
| 354 | * @see #controlChange(int, int) |
| 355 | */ |
| 356 | public void resetAllControllers(); |
| 357 | |
| 358 | /** |
| 359 | * Turns off all notes that are currently sounding on this channel. |
| 360 | * The notes might not die away instantaneously; their decay |
| 361 | * rate is determined by the internals of the <code>Instrument</code>. |
| 362 | * If the Hold Pedal controller (see |
| 363 | * {@link #controlChange(int, int) controlChange}) |
| 364 | * is down, the effect of this method is deferred until the pedal is |
| 365 | * released. |
| 366 | * |
| 367 | * @see #allSoundOff |
| 368 | * @see #noteOff(int) |
| 369 | */ |
| 370 | public void allNotesOff(); |
| 371 | |
| 372 | /** |
| 373 | * Immediately turns off all sounding notes on this channel, ignoring the |
| 374 | * state of the Hold Pedal and the internal decay rate of the current |
| 375 | * <code>Instrument</code>. |
| 376 | * |
| 377 | * @see #allNotesOff |
| 378 | */ |
| 379 | public void allSoundOff(); |
| 380 | |
| 381 | /** |
| 382 | * Turns local control on or off. The default is for local control |
| 383 | * to be on. The "on" setting means that if a device is capable |
| 384 | * of both synthesizing sound and transmitting MIDI messages, |
| 385 | * it will synthesize sound in response to the note-on and |
| 386 | * note-off messages that it itself transmits. It will also respond |
| 387 | * to messages received from other transmitting devices. |
| 388 | * The "off" setting means that the synthesizer will ignore its |
| 389 | * own transmitted MIDI messages, but not those received from other devices. |
| 390 | * |
| 391 | * It is possible that the underlying synthesizer |
| 392 | * does not support local control. In order |
| 393 | * to verify that a call to <code>localControl</code> |
| 394 | * was successful, check the return value. |
| 395 | * |
| 396 | * @param on <code>true</code> to turn local control on, <code>false</code> |
| 397 | * to turn local control off |
| 398 | * @return the new local-control value, or false |
| 399 | * if local control is not supported |
| 400 | * |
| 401 | */ |
| 402 | public boolean localControl(boolean on); |
| 403 | |
| 404 | /** |
| 405 | * Turns mono mode on or off. In mono mode, the channel synthesizes |
| 406 | * only one note at a time. In poly mode (identical to mono mode off), |
| 407 | * the channel can synthesize multiple notes simultaneously. |
| 408 | * The default is mono off (poly mode on). |
| 409 | * <p> |
| 410 | * "Mono" is short for the word "monophonic," which in this context |
| 411 | * is opposed to the word "polyphonic" and refers to a single synthesizer |
| 412 | * voice per MIDI channel. It |
| 413 | * has nothing to do with how many audio channels there might be |
| 414 | * (as in "monophonic" versus "stereophonic" recordings). |
| 415 | * |
| 416 | * It is possible that the underlying synthesizer |
| 417 | * does not support mono mode. In order |
| 418 | * to verify that a call to <code>setMono</code> |
| 419 | * was successful, use <code>getMono</code>. |
| 420 | * |
| 421 | * @param on <code>true</code> to turn mono mode on, <code>false</code> to |
| 422 | * turn it off (which means turning poly mode on). |
| 423 | * |
| 424 | * @see #getMono |
| 425 | * @see VoiceStatus |
| 426 | */ |
| 427 | public void setMono(boolean on); |
| 428 | |
| 429 | /** |
| 430 | * Obtains the current mono/poly mode. |
| 431 | * Synthesizers that do not allow changing mono/poly mode |
| 432 | * will always return the same value, regardless |
| 433 | * of calls to <code>setMono</code>. |
| 434 | * @return <code>true</code> if mono mode is on, otherwise |
| 435 | * <code>false</code> (meaning poly mode is on). |
| 436 | * |
| 437 | * @see #setMono(boolean) |
| 438 | */ |
| 439 | public boolean getMono(); |
| 440 | |
| 441 | /** |
| 442 | * Turns omni mode on or off. In omni mode, the channel responds |
| 443 | * to messages sent on all channels. When omni is off, the channel |
| 444 | * responds only to messages sent on its channel number. |
| 445 | * The default is omni off. |
| 446 | * |
| 447 | * It is possible that the underlying synthesizer |
| 448 | * does not support omni mode. In order |
| 449 | * to verify that <code>setOmni</code> |
| 450 | * was successful, use <code>getOmni</code>. |
| 451 | * |
| 452 | * @param on <code>true</code> to turn omni mode on, <code>false</code> to |
| 453 | * turn it off. |
| 454 | * |
| 455 | * @see #getOmni |
| 456 | * @see VoiceStatus |
| 457 | */ |
| 458 | public void setOmni(boolean on); |
| 459 | |
| 460 | /** |
| 461 | * Obtains the current omni mode. |
| 462 | * Synthesizers that do not allow changing the omni mode |
| 463 | * will always return the same value, regardless |
| 464 | * of calls to <code>setOmni</code>. |
| 465 | * @return <code>true</code> if omni mode is on, otherwise |
| 466 | * <code>false</code> (meaning omni mode is off). |
| 467 | * |
| 468 | * @see #setOmni(boolean) |
| 469 | */ |
| 470 | public boolean getOmni(); |
| 471 | |
| 472 | /** |
| 473 | * Sets the mute state for this channel. A value of |
| 474 | * <code>true</code> means the channel is to be muted, <code>false</code> |
| 475 | * means the channel can sound (if other channels are not soloed). |
| 476 | * <p> |
| 477 | * Unlike {@link #allSoundOff()}, this method |
| 478 | * applies to only a specific channel, not to all channels. Further, it |
| 479 | * silences not only currently sounding notes, but also subsequently |
| 480 | * received notes. |
| 481 | * |
| 482 | * It is possible that the underlying synthesizer |
| 483 | * does not support muting channels. In order |
| 484 | * to verify that a call to <code>setMute</code> |
| 485 | * was successful, use <code>getMute</code>. |
| 486 | * |
| 487 | * @param mute the new mute state |
| 488 | * |
| 489 | * @see #getMute |
| 490 | * @see #setSolo(boolean) |
| 491 | */ |
| 492 | public void setMute(boolean mute); |
| 493 | |
| 494 | /** |
| 495 | * Obtains the current mute state for this channel. |
| 496 | * If the underlying synthesizer does not support |
| 497 | * muting this channel, this method always returns |
| 498 | * <code>false</code>. |
| 499 | * |
| 500 | * @return <code>true</code> the channel is muted, |
| 501 | * or <code>false</code> if not |
| 502 | * |
| 503 | * @see #setMute(boolean) |
| 504 | */ |
| 505 | public boolean getMute(); |
| 506 | |
| 507 | /** |
| 508 | * Sets the solo state for this channel. |
| 509 | * If <code>solo</code> is <code>true</code> only this channel |
| 510 | * and other soloed channels will sound. If <code>solo</code> |
| 511 | * is <code>false</code> then only other soloed channels will |
| 512 | * sound, unless no channels are soloed, in which case all |
| 513 | * unmuted channels will sound. |
| 514 | * |
| 515 | * It is possible that the underlying synthesizer |
| 516 | * does not support solo channels. In order |
| 517 | * to verify that a call to <code>setSolo</code> |
| 518 | * was successful, use <code>getSolo</code>. |
| 519 | * |
| 520 | * @param soloState new solo state for the channel |
| 521 | * @see #getSolo() |
| 522 | */ |
| 523 | public void setSolo(boolean soloState); |
| 524 | |
| 525 | /** |
| 526 | * Obtains the current solo state for this channel. |
| 527 | * If the underlying synthesizer does not support |
| 528 | * solo on this channel, this method always returns |
| 529 | * <code>false</code>. |
| 530 | * |
| 531 | * @return <code>true</code> the channel is solo, |
| 532 | * or <code>false</code> if not |
| 533 | * |
| 534 | * @see #setSolo(boolean) |
| 535 | */ |
| 536 | public boolean getSolo(); |
| 537 | } |