Every time I check into a net, there is a short "tune" before the net to announce the net is starting on a repeater. Here is a recording:
http://kd0whb.duckdns.org/id/preamble.m4a
After hearing the preamble, I just made an ID using the variation of tones and occasionally air it on my repeater locally. Are there any legal issues with the following ID? I don't know if it is considered "music" or not, it is just a short sequence of sine wave tones.
Here are the two search occurrences of "music" from the FCC amateur rules from http://www.arrl.org/part-97-text.
ยง97.113 Prohibited transmissions.
(4) Music using a phone emission except as specifically provided elsewhere in this section;
(c) No station shall retransmit programs or signals emanating from any type of radio station other than an amateur station, except propagation and weather forecast information intended for use by the general public and originated from United States Government stations, and communications, including incidental music, ...
[bold text mine]
Here is how Merriam-Webster defines music:
a : the science or art of ordering tones or sounds in succession, in combination, and in temporal relationships to produce a composition having unity and continuity
b : vocal, instrumental, or mechanical sounds having rhythm, melody, or harmony ...
I think those tones fit this definition, don't you?