Applies a variable vibrato to the selected audio. Limitations: Maximum length is 99,999 samples (per audio channel). This limitation is hard coded into Audacity as the maximum size for table is 100000 samples. Thanks to Edgar-rtf for the suggestion of using (fmosc), which in spite of the length limitation provides an elegant solution. To overcome the length limitation, the function (snd-compose) could be used - this function uses a sound as a look-up table rather than using table. Old vers…