The oscilloscope contains in addition a signal generator for 2 channels for sine, square, triangular, sawtooth wave forms and different noise ... ... <看更多>

Audio Oscilloscope (Frequency Byte) - w/ web audio API and canvas - GenerateAudioWaveform. ... <看更多>

Generally speaking, the audio inputs of a PC are terrible. Lots of noise, terrible frequency response, etc. For example, the frequency ... ... <看更多>

An alternative to the missing inbuild audio input is a USB device. There are not many line-in stereo devices and most are only mono to use with ... ... <看更多>

Sound Card Oscilloscope · The oscilloscope measures peak-to-peak voltages and provides timing information on your signal. It's great for professionals or ... ... <看更多>

An answer was given for 500Hz with JavaScript here Detect audio frequency from microphone with node.js You can easily translate that to ... ... <看更多>