Yes, they seem like delay cycles. At 14 and 15 they are already very low.
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Below 300 bauds are settings for very old Teletype machines.
A more rational and standard settings list can be 110, 150, 300, 1200, 2400, 4800, 9600, 19200, 38400, etc.
And adding 31250 the EP could control Midi devices directly....