Sine wave: Difference between revisions
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(cross platform) |
(Scala contribution added.) |
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beep(prompt_number("Enter Frequency (100..10000 recommended):",{0x25,0x7FFF}))</lang> |
beep(prompt_number("Enter Frequency (100..10000 recommended):",{0x25,0x7FFF}))</lang> |
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=={{header|Scala}}== |
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<lang Scala>import javax.sound.sampled.{AudioFormat, AudioSystem, SourceDataLine} |
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import scala.math.{Pi, sin} |
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object SineWave extends App { |
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val sampleRate = 44000 |
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val buffer = beep(440, 5, sampleRate) |
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val line: SourceDataLine = AudioSystem.getSourceDataLine(format) |
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def format = new AudioFormat(sampleRate.toFloat, 8, 1, true, false) |
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def beep(frequency: Int, seconds: Int, sampleRate: Int) = { |
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val samples = seconds * sampleRate |
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val interval = sampleRate / frequency |
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val angle = 2.0 * Pi / interval |
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(0 until samples).map(i => (sin(angle * i) * 127).toByte).toArray |
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} |
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line.open() |
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line.start() |
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line.write(buffer, 0, buffer.length) |
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line.drain() |
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line.close() |
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}</lang> |
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