portaudio

Node wrapper around PortAudio

Note: This module has not been tested on windows. If you would like to submit a pull request that would be great.

Note: You must install PortAudio libs first.

Example

varportAudio=require('portaudio');// create a sine wave lookup tablevarsampleRate=44100;vartableSize=200;varbuffer=newBuffer(tableSize);for(vari=0;i<tableSize;i++){buffer[i]=(Math.sin((i/tableSize)*3.1415*2.0)*127)+127;}portAudio.getDevices(function(err,devices){console.log(devices);});portAudio.open({channelCount: 1,sampleFormat: portAudio.SampleFormat8Bit,sampleRate: sampleRate},function(err,pa){// send samples to be playedfor(vari=0;i<5*sampleRate/tableSize;i++){pa.write(buffer);}// start playingpa.start();// stop playing 1 second latersetTimeout(function(){pa.stop();},1*1000);});

Troubleshooting

error: 'PaStreamCallbackFlags' has not been declared

Try installing "libasound-dev" package. See (http://portaudio.com/docs/v19-doxydocs/compile_linux.html). Then try rebuilding.

If that doesn't fix it try building and installing portaudio from source (http://www.portaudio.com/download.html). I've compiled node-portaudio with pa_stable_v19_20111121.tgz and was successful on Ubunutu.

No Default Device Found

Ensure that when you compile portaudio that the configure scripts says "ALSA" yes.