[Coco] Coco sound 6 bit Dac

William Astle lost at l-w.ca
Tue Nov 8 01:59:47 EST 2016


Nope. SOUND uses the 6 bit DAC too. It creates a triangular waveform. 
(7E, FE, 7E, 02 in repeating sequence).

On 2016-11-07 10:19 PM, Simon Jonassen wrote:
> Then it must be the sound command i'm confusing it with
>
> I'm pretty sure one of the two use the 1bit sound source
>
> /Simon :-)
>
>
>
> -----Oprindelig meddelelse-----
> Fra: Coco [mailto:coco-bounces at maltedmedia.com] På vegne af tim lindner
> Sendt: 8. november 2016 05:15
> Til: CoCoList for Color Computer Enthusiasts
> Emne: Re: [Coco] Coco sound 6 bit Dac
>
> On Mon, Nov 7, 2016 at 2:21 PM, Simon Jonassen <simon at roust-it.dk> wrote:
>> @robert gualt...
>>
>> PLAY uses the 1bit output afaik.... so not a good DAC tutorial
>>
>> Just my 2c
>
> I can guarantee you that the Color BASIC's PLAY command uses the 6 bit DAC.
>
> For those unfamiliar with the Color Computer's sound hardware:
>
> There are 4 sound sources.
>   1. Casette audio
>   2. 6 bit DAC
>   3. Analog pin on the cartridge port.
>   4. 1 bit DAC
>
> Sources 1 thru 3 are switched on or off by an internal electronic
> switch called the MUX.
>
> Source 4 is always connect and separate from the other three.
>
> It's most famous use is the heart beat in Dungeons of Daggeroth.
>
>
>



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