Re: TI-H: 16 bit sound on 92

To: ti-hardware@lists.ticalc.org
Subject: Re: TI-H: 16 bit sound on 92
From: tsaimelv@pilot.msu.edu (Mel Tsai)
Date: Mon, 22 Dec 1997 05:00:22 GMT
In-Reply-To: <19971222044641.4564.qmail@hotmail.com>
References: <19971222044641.4564.qmail@hotmail.com>
Reply-To: ti-hardware@lists.ticalc.org


>would a shift register work. Set it up to count every cycle of the 
>screen and count a certain number of bits. Only 16 dots would be needed 
>to do it, if the screen refresh is fast enough, and a line or square in 
>the corner could do the work unobtrusively. Even if you needed to use 
>more data than that, you could just reserve the 4 columns or whatever is 
>required. It might require an AVR or PIC even, but a standard format for 
>high quality stereo sound output on any calc would be nice. If you're 
>using an AVR or PIC, it might even be possible to reserve some other 
>lines for tone data generated by a hardware or software (on the Micro) 
>waveform generator! Programs could be identified as 16-bit ready and it 
>wouldn't impair link functions or anything. You would be including the 
>data allong withthe screen data, so there would be no need to switch 
>internal ports, AND would also free up the link so sound and link play 
>could be done simultaneously! 

16 bit sound at standard CD quality requires over 150k/sec transfer
rates.  Even at the lowest possible sampling rates, 16 bit sound
requires far more bandwidth than any TI link can handle.

-Mel
~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
-The TI-Memory Expansion Homepage
-http://www.egr.msu.edu/~tsaimelv/expander.htm

References:

Re: TI-H: 16 bit sound on 92

From: "Richard Piotter" <richfiles1@hotmail.com>