VOA Radiogram during the weekend of 1-2 March 2013 included transmissions in Olivia 64-2000, 32-2000, 16-2000, and 8-2000. Each mode is 2000 Hz wide, but they have 64, 32, 16, and 8 tones, respectively, and is faster as the number of tones decreases.

You can hear and see examples in YouTubes provided by Lorenzo in Italy and Tim in Colorado, both for the same broadcast, 1 March, 1600-1630 UTC, on 17860 kHz.

From Lorenzo in Italy:
http://youtu.be/lQ7xaZJdks0

From Time in Colorado:
http://youtu.be/mgHbeh_EzpY

Here’s the QSL for the weekend of 1-2 March 2014: