Audio Spectrum Analyzer

Audio Spectrum Analyzer was designed with accuracy and ease of use in mind. It can be used for monitoring or measuring environmental sound or noise; help tuning instruments; timing short sound events; and educational purpose.

Features:

• No Ads.
• With log or linear frequency axis.
• Can label frequency axis using music pitch note.
• Support all possible sampling rates and almost all recorder sources of your device.
• Graph with nice grid lines and labels, easy to operate.
• FFT sample size range from 64 to 32768. Using half-overlapped (adjustable) time window to increase time resolution.
• Various window functions provided, for different frequency resolution and dynamical range.
• Peak frequency detection (in unit of Hz and note+cent), with a moderate accuracy (FFT + interpolation).
• With dB or A-weighting dB (dBA).
• Can record the audio in wav (PCM) format.
• Pinch to zoom, drag or swipe to move, long-press to place cursor, double touch to reset zoom.

Notes: May need some knowledge of discrete Fourier transform and spectrum analysis to use it well. The actual accuracy mainly depends on your device. No calibration interface provided.