The holy grail of the BEEP(1400, 0.08) command: USB-HID

[muteki]

I thought the holy grail (on G1) would be soldering a piezo to the unused piezo pad and use an ACE exploit in firmware to call

Code:

Buzzer(1400, 80)

Jokes aside, one can also use a Raspberry Pi Pico connected via OTG. Not only it's only $4, being available everywhere, you also got much more I/O options (SPI or even efficient bitbanging for weird sensors like DHT11). The sky (and also the 64KB/s hard limit of transfer rate unfortunately) is the limit.