Spectroid

Spectroid is a real-time audio spectrum analyzer with reasonable frequency resolution across the the entire frequency spectrum.

💬 FAQ 💬

Q: Why are the dB values negative?

A: Spectroid uses dBFS (Full Scale) where 0 dB is the maximum power that the microphone can measure, so the decibel values are negative because the measured power is less than the maximum power.

Q: Can I zoom in on the spectrum plot?

A: Yes, do a two-finger pinch-to-zoom gesture.

Q: Why are there discontinuities/gaps in the spectrum plot and waterfall?

A: Spectroid uses multiple FFTs overlapped in frequency in order to provide better frequency resolution at lower frequencies than a single FFT. The caveat of this method is varied impulse response and minor discontinuities in frequency. The upside is that it can efficiently produce a spectrum that better matches the frequency resolution of human audio perception. It's still probably not as good as your ears though!

Spectroid是一个实时音频频谱分析仪跨越整个频谱合理的频率分辨率。

💬FAQ💬

问：为什么是分贝值负？

答：Spectroid使用dBFS的（满刻度），其中0分贝是，麦克风可以测量的最大功率，所以分贝值是负的，因为所测量的功率小于最大功率。

问：我可以放大的频谱图？

答：是的，做了两个手指捏到缩放手势。

问：为什么在频谱图和瀑布间断/差距？

答：Spectroid使用在频率重叠多个FFT，以便在比一个单一的FFT较低频率提供更好的频率分辨率。这种方法的需要注意的是变化的脉冲响应和频率轻微的不连续性。有利的一面是，它可以有效地产生更好的人类感知声音的频率分辨率相匹配的频谱。它仍然可能没有你的耳朵一样好，但！