Html5 audio recorder install#

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Html5 audio recorder code#

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Html5 audio recorder update#

Please pay attention to GitHub for source code update The demo has detailed code, so I wonвЂ™t say more here. SampleRate: 8000, // the sampling rate is generally provided by the device, such as 48000Д«itrate: 64, // bit rate, not lower than 64, otherwise no sound (human voice) may be recorded Numchannels: 1, // number of channels, default to 1 SampleRate is only for people with special needs The only parameter that affects the MP3 file size is bitrate The sampling frequency of MP3 is divided into 48000 44100 32000 24000 22050 16000 12050 8000Д¬omparison of bit rate value with real audio (for reference only)Дў4kbps = add telephone sound quality, short wave broadcasting, long wave broadcasting and European standard medium wave broadcastingД¤0kbps = American standard medium wave broadcastingД¦4Kbps = add voice (optimal bit rate setting of mobile phone ringtone and optimal setting of mobile phone mono MP3 player)ДЎ28kbps = tape (best setting value of mobile phone Stereo MP3 player and low-grade MP3 player)ДЎ60kbps = hifi high fidelity (best setting value of medium and high-grade MP3 player)ДЎ92kbps = CD (best setting value of high-end MP3 player)Дў56Kbps = studio music studio (for music enthusiasts) With 64Kbps bit rate, the audio length recorded for one minute is about 480kb.

See mp3-recorderгЂ‚ If you are interested in the implementation process or in using lamejs, you can refer to my source code.

I have combed and encapsulated the code and published it to GitHub. According to reports, encoding a 132 second length of audio takes only 6.5 seconds. Later, someone rewritten it using JS based on libmp3lame, which is the current version lamejsproject Compared with libmp3lame, it is smaller and can achieve faster coding speed. There was originally an open source project libmp3lame-js, the lame source code was directly compiled into the JS version. Someone has implemented the lame encoder of JS version, which can record MP3 Audio directly on the browser side. It has to be said that the development of front-end technology is really changing with each passing day. Originally it used a roundabout way to upload the server to the lame encoding converter, but because of the large file, the upload was slow. One problem was that the wav format saved was very large.