Some options are becoming available... An open codec like Speex COULD run in the existing D-STAR protocol... http://www.speex.org/ On Mon, Jun 9, 2008 at 8:55 AM, David B. Toth <ve3gyq at amsat.org> wrote: > Even if ham radio had waited for an Open Source Vocoder, we still > would not have it and certainly not in chip form.