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关于Spectral Audio
音频频谱分析仪进行平滑，保持，峰值，缩放和增益功能。
Spectral Audio is an audio frequency analyzer that uses your phone/tablet mic input.
Data sampled at 44.1 kHz is used to produce length 2048 FFTs and display
an energy spectral density from 0-22 kHz.
Technical Specs
- Frequency Range 0-22 kHz
- 2048 pt FFT
- Frequency resolution 21.5 Hz
- DC component removed
- Hamming Window
- Sampling Rate 44100 samples/sec
- Sampling Period 46 ms
- Smoothing Function: 5 pt triangular moving average
Features
- Linear and Log amplitude
- Smoothing Function
- Peak Identifier
- Hold function
- Local Zoom function (X 8)
- Selectable Gain - 0, 5, 10, 15 dB
最新版本1.1的更新日志
Last updated on 2015年08月13日
Attempt to fix issue with menu button crash - Note that this app has no menu function but apparently the menu button would cause a crash on some devices. Couldn't duplicate on my test devices, but redid the code to ignore the button press.
Added Linear Amplitude display. Note that the scale is floating for Linear Amplitude meaning that it adjusts to the signal energy amplitude with each render.
视频和屏幕截图
Spectral Audio历史版本
805.1 KB2015年08月13日
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