Hopefully, I have phones to calculator. I have because it came with my cellphone.

I think if someone arranged a sound lib and easily include in grayscale code, it wouldn't be hard to maintain and is a plus to some games.
Sound would be mostly to SE, though. I think speed wouldn't be a big issue seeing the effect of sound in TI-Boy SE...

Without a lib, it is a somewhat hard task to keep and few people would use it after you employed such work... It should be a nice experience to see sound that you produced with your coding skills. 

 Anyway it has to be seen as an optional and secondary feature to calc games.

That's a good point, but I doubt if people would like to have no music playing while they have headphones in. =\

I think those are all good explanations.  The speed is probably the most major of those issues, but even when its not an issue, how many people have you seen carrying around headphones and plugging them into their calculators to play a game?  Its pretty inconvenient in my opinion since it doesn't really add much to games that are already so limited in color and resolution, it hardly enhances the experience.  I only added it to Pyoro because I thought it would be cool and I always wanted to try it.  Yet I don't even own a pair of those headphones.  I just spliced the link cable so I could bypass a speaker to it.

Axe will for sure have some type of ToneOut() command that will be like the pause command except play a frequency instead of doing nothing.  But that's about all you can do since anything more elaborate really takes a toll on the processing speed.  There is no hardware 'audio driver' so you must use software which makes it really slow.

Holy shit I played a game on my calc with sound w/o knowing it xd (and I do have 2.5mm phones here somewhere)
Have to try it out soon.

+ the Toneout() cmd sounds like a cool feature

Well if you were at home you could just hook speakers up to the calc, that way you don't have headphones on for no reason and when you do hear music it is a surprise

Well wasn't it established that it was a limited audience anyways?

I wasn't trying to be rude, it was more of a joke. Hopefully nobody took offence (I'm sorry if you did.)

Oh ya, I know what you mean. And ya, I saw that post so I know where you're coming from. I wasn't trying to act like someone skipped over that, was just said as a joke. Thanks though

wait! he finally released it? Took a while He was working on it around 2005 or 2006.