I think it looks good. Once there is a consensus I will be able to add it to the next revision of the spec, along with PAL.
Just clarify one thing for me, what is the frequency for? How does it differ from the sample rate?
(chip16 assembler) Js16
(browser chip16 emulator)
(chip16 emulator) img16
(chip16 sprite converter)
Desktop: i5 750 @ 3.6 Ghz, 4GB ram, GTX 570 OC | Windows 7 Pro 64
Laptop: (Thinkpad) i5 430M, 4GB ram, Intel IGP | Arch Linux, Windows 7 Pro 64