Cannot get encoding to work.

[MatthewLM]

I've tried two things. This:

function Encoder(sampleRate) {

    // Ogg Vorbis
    var vorbis = new OggVorbisEncoder(sampleRate, 2, 0.5);

    this.encode = function(sample) {
        vorbis.encode([
            Float32Array.of(sample.getLeft(), sample.getRight()), 
        ]);
    };

}

gives:

TypeError: Cannot read property 'length' of undefined
    at Float32Array.set (native)

when calling encode.

This:

this.encode = function(sample) {
        vorbis.encode([
            Float32Array.of(sample.getLeft()), 
            Float32Array.of(sample.getRight())
        ]);
    };

gives:

Start offset is negative TypeError: Start offset is negative
    at Float32Array.set (native)