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Omnimaga => News => Topic started by: critor on September 19, 2013, 04:39:42 pm

Title: Orion TI-84 Plus music - now up to 999 notes
Post by: critor on September 19, 2013, 04:39:42 pm
In a previous news (http://ourl.ca/19541), Adriweb did invent an easy way to play music on TI-84 Plus, using the Orion voice module.  ;D(http://www.omnimaga.org/Themes/default/images/gpbp_arrow_up.gif)


Indeed, system 2.55/ORk plays a sound based on the vertical position whenever the cursor on the graph screen is moved.
A first approach was therefore to use the function 'Trace' mode to obtain a sequence of sounds. In this mode, the cursor follows the plot of the function and shows you the coordinates of a point for each column of the screen. As Adriweb noted, in this context we were limited by the hardware: the width of the screen (96x64 pixels). We couldn't play without interruption a music of more than 96 notes in theory (95 in practice, the first note tending to be skipped upon 'Trace' mode activation).
(http://i.imgur.com/hNbIo1z.png)

Beyond 95 notes, you need a several seconds pause to switch the plot or chande the window before going on.  :(


I am pleased to announce today that I have literally exploded this hardware limitation!  ;D(http://www.omnimaga.org/Themes/default/images/gpbp_arrow_up.gif)
Instead of the function 'Trace' mode, let's use the statistics 'Trace' mode which works completely differently.
Instead of giving the coordinates of points for each column of the screen, it gives them to each value of the X-axis list. With more than 95 elements, points are going to appear in the same screen column. But this time they can all be selected and therefore they are all playable!  ;D(http://www.omnimaga.org/Themes/default/images/gpbp_arrow_up.gif)
(http://i.imgur.com/yQnXjVi.png)

We are now limited by the software, as the maximum number of items for lists on TI-83+/84 is 999 - but it's enough to play musics more than 10 times longer than last time and to organize concerts! ;)

Here is for exemple a 125 notes music, proving that the 95 notes limit was crossed successfuly! ;)


Tinkerers philosophy:
The real question is not "what does it do" but "what can I make it do!" ;)


Source:
http://tiplanet.org/forum/viewtopic.php?p=148335&lang=en
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: critor on September 19, 2013, 05:27:00 pm
Now, the ones with a better musical background than mine, should be able to help us at making some conversion/reference table.
 
You've got all playable sounds in trace mode with the 63 vertical positions of the cursor (Y=0, 1, 2, ..., 61, 62)


Thanks to you, we might be able to achieve huge things in the future. ;)
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: blue_bear_94 on September 19, 2013, 11:01:34 pm
It's not aligned to the half-tones that we are used to employing in music, though...
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: Adriweb on September 20, 2013, 06:53:13 am
blue_bear_94 :
Yeah, I noticed that before (http://ourl.ca/19541) :
Quote
Indeed, the height of the sound depends directly on the y-coordinate of the pixel, but the change is not by semitone as in our traditional tempered scales (http://en.wikipedia.org/wiki/Tempered_scale) ; in fact, the increase in pitch of the sounds are done by a few commas (http://en.wikipedia.org/wiki/Comma_(music)) and therefore we don't always get on a well-defined note ...

It makes making music a bit more complicated, or well, just a bit weird for the listener some time.

(Critor : wring link for the "Previous news" :P)
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: Roboman on September 20, 2013, 09:24:00 am
Nice!
now if only it could be automated with a basic program...
(asm automation is more likeley... someone figure that out XD)
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: Sorunome on September 20, 2013, 12:46:55 pm
Nice one!
Now let's put a rickroll on there, finally.....
Title: Re: Orion TI-84 Plus music - now up to 999 notes
Post by: DJ Omnimaga on September 20, 2013, 11:25:15 pm
Nice find :D

Btw if an auto keypress program was made, I wonder if we could simulate double channel music by quickly alternating between notes?