5/2/2023 0 Comments Java audiodevice volume![]() ![]() ![]() A way of fixing a poorly performing volume slider is to change it to a logarithmic scale. Some audio volume slider widgets operate on a logarithmic scale while others are linear. I would find it helpful if the documentation states what scale the volume operates on: ![]() Valid values for the AudioVolume property would probably range from 0.0 (meaning 0%) to 1.0 (meaning 100%), but you might decide to also allow values greater than 100% because some volume controls do actually support "overdrive" or "boost" volumes, especially in cases where the source audio material may contain quiet sounds. Note mute is different to setting the AudioVolume property to zero. If you want, you could include the IsAudioVolumeMuted property to support a mute/unmute setting, but this isn't strictly essential, because apps can build their own mute/unmute setting atop the AudioVolume property. Scripting on this page enhances content navigation, but does not change the content in any way.// Optional: public bool IsAudioVolumeMuted If you use Clip for playing, then the Clip implementation creates this type of thread itself. If you use SourceDataLine for playing, then a separate thread for writing data into the line is also the preferred method to use. ![]() The preferred way to record is to read data in a separate thread to prevent the possible influence of other tasks (for example, UI handling). If all data from the buffer has been played and no new data is written to the line, then an underrun condition will occur, and silence will be played until you write a new portion of audio data to the line. This will produce artifacts in the recorded audio data.Ī similar situation occurs with playing. If you did not read from the line for a long time, then an overrun condition will occur, and older data will be replaced with new data. Recorded data is kept in a DataLine buffer. See AudioSystem.getAudioInputStream documentation for details about format conversion. If you need to play or record mu-law data, then the preferred way is to convert it to PCM format through a format converter. Most sound cards support only PCM formats, and even if the driver supports mu-law, then it requires some modification to the software. The formats are supported by most sound cards. Use supported formats as much as possible: PCM 8 or 16 bits 8000, 11025, 22050, 44100 Hz. To use some audio format for recording or playing, the format must be supported by your system (sound card drivers). Java Sound supports various audio formats, but their availability depends on the operating system. In any case, you must handle the presence of the plug-in, for example, by distributing the required plug-ins with your application or by requiring plug-ins to be installed in the client Java environment. You can use Sun, third-party, or your own plug-ins to read various audio files. Java Sound also supports plug-ins for file readers and writers through the service provider interface (SPI). Java Sound file readers support some formats (uncompressed PCM, a-law, mu-law), but do not support ADPCM, MP3, and others. Most of the file formats are only containers and can contain audio data in various compressed audio formats. Java Sound supports a set of audio file formats, for example AU, AIF, and WAV. On the Oracle Solaris and Linux operating systems, you might be unable to play sounds because an application (or sound daemon, such as esd or artsd) opens the audio device exclusively, thereby denying Java Sound access to the device. To test your sound configuration, run any native sound application and play some sound through it. In addition, ensure that your speakers are connected and that your sound card volume and mute state are adjusted to the appropriate value. Troubleshoot Java sound issues such as system sound configuration, audio file format, audio format, and overrun and underrun conditions.Įnsure that your audio system is correctly configured (sound card driver/DirectSound for Windows, ALSA for Linux, Audio Mixer for Oracle Solaris). ![]()
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