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Java Standard Edition (SE)



Interface Synthesizer

  • All Superinterfaces:
    AutoCloseable, MidiDevice

    public interface Synthesizer
    extends MidiDevice
    A Synthesizer generates sound. This usually happens when one of the Synthesizer's MidiChannel objects receives a noteOn message, either directly or via the Synthesizer object. Many Synthesizers support Receivers, through which MIDI events can be delivered to the Synthesizer. In such cases, the Synthesizer typically responds by sending a corresponding message to the appropriate MidiChannel, or by processing the event itself if the event isn't one of the MIDI channel messages.

    The Synthesizer interface includes methods for loading and unloading instruments from soundbanks. An instrument is a specification for synthesizing a certain type of sound, whether that sound emulates a traditional instrument or is some kind of sound effect or other imaginary sound. A soundbank is a collection of instruments, organized by bank and program number (via the instrument's Patch object). Different Synthesizer classes might implement different sound-synthesis techniques, meaning that some instruments and not others might be compatible with a given synthesizer. Also, synthesizers may have a limited amount of memory for instruments, meaning that not every soundbank and instrument can be used by every synthesizer, even if the synthesis technique is compatible. To see whether the instruments from a certain soundbank can be played by a given synthesizer, invoke the isSoundbankSupported method of Synthesizer.

    "Loading" an instrument means that that instrument becomes available for synthesizing notes. The instrument is loaded into the bank and program location specified by its Patch object. Loading does not necessarily mean that subsequently played notes will immediately have the sound of this newly loaded instrument. For the instrument to play notes, one of the synthesizer's MidiChannel objects must receive (or have received) a program-change message that causes that particular instrument's bank and program number to be selected.

    See Also:
    MidiSystem.getSynthesizer(), Soundbank, Instrument, MidiChannel.programChange(int, int), Receiver, Transmitter, MidiDevice


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