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package javax.sound.midi;


A SoundbankResource represents any audio resource stored
in a Soundbank.  Common soundbank resources include:

    

  • Instruments.  An instrument may be specified in a variety of
ways.  However, all soundbanks have some mechanism for defining
instruments.  In doing so, they may reference other resources
stored in the soundbank.  Each instrument has a Patch
which specifies the MIDI program and bank by which it may be
referenced in MIDI messages.  Instrument information may be
stored in Instrument objects.

  • Audio samples.  A sample typically is a sampled audio waveform
which contains a short sound recording whose duration is a fraction of
a second, or at most a few seconds.  These audio samples may be
used by a Synthesizer to synthesize sound in response to MIDI
commands, or extracted for use by an application.
(The terminology reflects musicians' use of the word "sample" to refer
collectively to a series of contiguous audio samples or frames, rather than
to a single, instantaneous sample.)
The data class for an audio sample will be an object
that encapsulates the audio sample data itself and information
about how to interpret it (the format of the audio data), such
as an AudioInputStream.     
    • 

  • Embedded sequences.  A sound bank may contain built-in
song data stored in a data object such as a Sequence.




Synthesizers that use wavetable synthesis or related
techniques play back the audio in a sample when
synthesizing notes, often when emulating the real-world instrument that
was originally recorded.  However, there is not necessarily a one-to-one
correspondence between the Instruments and samples
in a Soundbank.  A single Instrument can use
multiple SoundbankResources (typically for notes of dissimilar pitch or
brightness).  Also, more than one Instrument can use the same
sample.

Author:Kara Kytle
/**
 * A <code>SoundbankResource</code> represents any audio resource stored
 * in a <code>{@link Soundbank}</code>.  Common soundbank resources include:
 * <ul>
 * <li>Instruments.  An instrument may be specified in a variety of
 * ways.  However, all soundbanks have some mechanism for defining
 * instruments.  In doing so, they may reference other resources
 * stored in the soundbank.  Each instrument has a <code>Patch</code>
 * which specifies the MIDI program and bank by which it may be
 * referenced in MIDI messages.  Instrument information may be
 * stored in <code>{@link Instrument}</code> objects.
 * <li>Audio samples.  A sample typically is a sampled audio waveform
 * which contains a short sound recording whose duration is a fraction of
 * a second, or at most a few seconds.  These audio samples may be
 * used by a <code>{@link Synthesizer}</code> to synthesize sound in response to MIDI
 * commands, or extracted for use by an application.
 * (The terminology reflects musicians' use of the word "sample" to refer
 * collectively to a series of contiguous audio samples or frames, rather than
 * to a single, instantaneous sample.)
 * The data class for an audio sample will be an object
 * that encapsulates the audio sample data itself and information
 * about how to interpret it (the format of the audio data), such
 * as an <code>{@link javax.sound.sampled.AudioInputStream}</code>.     </li>
 * <li>Embedded sequences.  A sound bank may contain built-in
 * song data stored in a data object such as a <code>{@link Sequence}</code>.
 * </ul>
 * <p>
 * Synthesizers that use wavetable synthesis or related
 * techniques play back the audio in a sample when
 * synthesizing notes, often when emulating the real-world instrument that
 * was originally recorded.  However, there is not necessarily a one-to-one
 * correspondence between the <code>Instruments</code> and samples
 * in a <code>Soundbank</code>.  A single <code>Instrument</code> can use
 * multiple SoundbankResources (typically for notes of dissimilar pitch or
 * brightness).  Also, more than one <code>Instrument</code> can use the same
 * sample.
 *
 * @author Kara Kytle
 */

public abstract class SoundbankResource {


    
The sound bank that contains the SoundbankResources

/**
     * The sound bank that contains the <code>SoundbankResources</code>
     */
    private final Soundbank soundBank;


    
The name of the SoundbankResource

/**
     * The name of the <code>SoundbankResource</code>
     */
    private final String name;


    
The class used to represent the sample's data.

/**
     * The class used to represent the sample's data.
     */
    private final Class dataClass;


    /**
     * The wavetable index.
     */
    //private final int index;


    
Constructs a new SoundbankResource from the given sound bank
and wavetable index.  (Setting the SoundbankResource's name,
sampled audio data, and instruments is a subclass responsibility.)

Params:
  • soundBank – the sound bank containing this SoundbankResource
  • name – the name of the sample
  • dataClass – the class used to represent the sample's data
See Also:
/**
     * Constructs a new <code>SoundbankResource</code> from the given sound bank
     * and wavetable index.  (Setting the <code>SoundbankResource's</code> name,
     * sampled audio data, and instruments is a subclass responsibility.)
     * @param soundBank the sound bank containing this <code>SoundbankResource</code>
     * @param name the name of the sample
     * @param dataClass the class used to represent the sample's data
     *
     * @see #getSoundbank
     * @see #getName
     * @see #getDataClass
     * @see #getData
     */
    protected SoundbankResource(Soundbank soundBank, String name, Class<?> dataClass) {

        this.soundBank = soundBank;
        this.name = name;
        this.dataClass = dataClass;
    }


    
Obtains the sound bank that contains this SoundbankResource.

Returns:the sound bank in which this SoundbankResource is stored
/**
     * Obtains the sound bank that contains this <code>SoundbankResource</code>.
     * @return the sound bank in which this <code>SoundbankResource</code> is stored
     */
    public Soundbank getSoundbank() {
        return soundBank;
    }


    
Obtains the name of the resource.  This should generally be a string
descriptive of the resource.

Returns:the instrument's name
/**
     * Obtains the name of the resource.  This should generally be a string
     * descriptive of the resource.
     * @return the instrument's name
     */
    public String getName() {
        return name;
    }


    
Obtains the class used by this sample to represent its data.
The object returned by getData will be of this
class.  If this SoundbankResource object does not support
direct access to its data, returns null.

Returns:the class used to represent the sample's data, or
null if the data is not accessible
/**
     * Obtains the class used by this sample to represent its data.
     * The object returned by <code>getData</code> will be of this
     * class.  If this <code>SoundbankResource</code> object does not support
     * direct access to its data, returns <code>null</code>.
     * @return the class used to represent the sample's data, or
     * null if the data is not accessible
     */
    public Class<?> getDataClass() {
        return dataClass;
    }


    
Obtains the sampled audio that is stored in this SoundbankResource.
The type of object returned depends on the implementation of the
concrete class, and may be queried using getDataClass.

See Also:
Returns:an object containing the sampled audio data
/**
     * Obtains the sampled audio that is stored in this <code>SoundbankResource</code>.
     * The type of object returned depends on the implementation of the
     * concrete class, and may be queried using <code>getDataClass</code>.
     * @return an object containing the sampled audio data
     * @see #getDataClass
     */
    public abstract Object getData();


    /**
     * Obtains the index of this <code>SoundbankResource</code> into the
     * <code>Soundbank's</code> set of <code>SoundbankResources</code>.
     * @return the wavetable index
     */
    //public int getIndex() {
    //  return index;
    //}


    /**
     * Obtains a list of the instruments in the sound bank that use the
     * <code>SoundbankResource</code> for sound synthesis.
     * @return an array of <code>Instruments</code> that reference this
     * <code>SoundbankResource</code>
     *
     * @see Instrument#getSamples
     */
    //public abstract Instrument[] getInstruments();
}