"If you wrote a piece of code in a computer, saved it on a [Commodore ... could be copied to another tape and as sounds could be transmitted over radio, then why should it not be possible ...

Some doubt this sonic “backdoor” can be genuine – no one has yet tracked down computer code that can generate ... from ultrasonic audio being transmitted between the loudspeakers and ...

The question in this case, which comes to us at the preliminary injunction stage, is whether the statute is likely to violate the First Amendment rights of two individuals who write computer code ...