[Coco] Podcast player for CoCo2/3

[Brett Gordon]

Thanks John, looks like I guessed right.  I thought I read one time that
there is quite a bit of slop on how microcomputers handled NTSC; I was
wondering if anyone plopped a oscilloscope on their coco and measured the
vsync/hsync directly.  I imagine there would be some play in numbers
between each individual coco, too. (not that a few hz one way or the other
would really mean much to this particular app)

brett


On Wed, Nov 2, 2016 at 5:53 PM, John W. Linville <linville at tuxdriver.com>
wrote:

> On Wed, Nov 02, 2016 at 04:19:44PM -0400, Brett Gordon wrote:
> > Travis:  Nice!  I see you figured out how to add the pbm image.  Looks
> like
> > it cues too fast for a short song - maybe that should be cueing should
> > proportional to the song length?
> >
> > Has anyone actually measured the hsync on the coco?  15,720 hz ~sounds~
> > close, but I've seen 15,734 and also 15,750 per NTSC.  Encoding the sound
> > at 15,734 was a little slow, and 15,750 hz was noticeably slow; John
> > Linville's voice took on a James Earl Jones quality.
>
> I'm reasonably confident on the 15720 -- non-interlaced 262 lines per
> frame, 60 frames per second (15720 lines per second).  Interlacing
> would go to 262.5 lines per field, 2 fields per frame, 30 frames per
> second (15750 lines per second). Technically for true NTSC there is
> a factor of 1000/1001 in there too (which is probably the source of
> your 15734 number), but I don't think (?) the 6847 knows about that
> part of the spec -- YMMV! I should re-check the datasheet...
>
> John
>
> > I'm hoping Gene will know the answer.
> >
> > On Wed, Nov 2, 2016 at 3:22 PM, Travis Poppe <travispoppe at gmail.com>
> wrote:
> >
> > > I decided to play around with this on my lunch break. Here's a video of
> > > Brett's player playing a song on my CoCo 3:
> > >
> > > https://goo.gl/photos/4eTNhJdpe7D5THue9
> > >
> > > I think it actually sounds better in person.
> > >
> > > Awesome job, Brett!
> > >
> > > Travis
> > >
> > > On Mon, Oct 31, 2016 at 09:23:30AM -0400, Brett Gordon wrote:
> > > > Tired of listening to all the cool retro podcasts on your boring new
> > > > Android, or iPhone?  Is this not retro enough and way too portable
> for
> > > your
> > > > tastes?   Try my podcast player for the CoCo + SDC, an listen to
> John,
> > > > Neil, Mike, others, in true CoCo style:
> > > >
> > > > https://drive.google.com/drive/folders/0B3kx1fDw300PWWlkMkNrcWw4Q2s
> > > >
> > > > As seen on youtube:
> > > >
> > > > https://www.youtube.com/watch?v=w1bfTyVEYxU
> > > >
> > > > enjoy!
> > > >
> > > > brett
> > > >
> > > > --
> > > > Coco mailing list
> > > > Coco at maltedmedia.com
> > > > https://pairlist5.pair.net/mailman/listinfo/coco
> > >
> > > --
> > > Travis Poppe
> > > IRC: tlp on irc.freenode.net
> > >
> > > --
> > > Coco mailing list
> > > Coco at maltedmedia.com
> > > https://pairlist5.pair.net/mailman/listinfo/coco
> > >
> >
> > --
> > Coco mailing list
> > Coco at maltedmedia.com
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>
> --
> John W. Linville                Someday the world will need a hero, and you
> linville at tuxdriver.com                  might be all we have.  Be ready.
>
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