setD method
Copies the fields of o into this instance and returns this.
Implementation
@override
WaveD setD(WaveD o) {
frameCount = o.frameCount;
sampleRate = o.sampleRate;
sampleSize = o.sampleSize;
channels = o.channels;
data = _WaveUtils._bufferCopy(o.data, sampleSize);
return this;
}