Talk:CD+G

Untitled
What on earth is with the CD+G discography? CD+G is a format, not a band, and there are hundreds of CD+G discs around. Some public libraries even have sections for them. (Try searching your catalog for "karaoke")

Answer: The Karaoke CD+G's only began to be released in any consequential number at the mid-1990's, but the technology extends at least as far back as a title pressed in 1985 titled "Eat or be Eaten" by the Firesign Theatre. Between there and about 1994 there is a small trickle of CD titles which have CD+G information, and though this information often features lyrics it often does not highlight the words as they would be sung (which the later Karaoke CD+G's would do), and other information about the band or the song or whatever would be presented, as well as pictures, photos, and artwork. A number of these early titles are classical works without any lyrics at all, and the Firesign Theatre disk only puts up pictures suitable to the comedy skits as they come up. These early titles are much more interesting, and comprise a much shorter and manageable set to enumerate than all the doubtless countless many different Karaoke CD+G's have have been released, and might possibly still be being released. —Preceding unsigned comment added by 151.190.254.108 (talk) 22:16, 29 March 2011 (UTC)

CD+G+MIDI extension
The stored data need not be a graphics file : Jim Bumgardner's CD+G Revealed says
 * There already is a CD+G+MIDI extension of the CD+G standard, but I won't describe it here.

Does anyone know more ?

--195.137.93.171 (talk) 02:51, 22 October 2010 (UTC)


 * that full text says:
 * "Note: if you gain sufficient control of the CD mastering process, you could define your own Audio-compatible format which is potentially more interesting than CD+G. For example, you could use the Subchannel to store control information for an animatronics robot, MIDI information, etc. There already is a CD+G+MIDI extension of the CD+G standard, but I won't describe it here."
 * So it is not technically part of the CD+G format. So it doesn't really belong to this wiki article.  The subchannel data can be used to store all sorts of other things too.  But this wiki article is only on CD+G, which is the particular graphics extension to audio CD. Em3rgent0rdr (talk) 03:25, 26 March 2022 (UTC)

Capacity
The wiki had said up to 800 MB capacity. But I flagged this as citation needed, cause I couldn't find any verification about this.

The 800 MB number sounds like the High Capacity data CD format, but that didn't come around for later than when the CD+G format was introduced in 1985, so I'm not sure that number should be used.

What I do know from reading available info on this format, is that it is specifically and extension of regular audio CD format, but uses unused subcodes deliberately reserved. So regular audio CD's essentailly already had this "capacity" but simply didn't utilize it.

Looking at Compact disc I see that the regular audio CD:

"are designed to hold up to 74 minutes of uncompressed stereo digital audio or about 650 MB of data. Capacity is routinely extended to 80 minutes and 700 MB by arranging more data closely on the same sized disc".

(But another topic is that "650 MB" and "700 MB" is referring to when stored in data mode I believe...but the audio mode uses less bits for error correction and so actually have more MB of audio than the corresponding number when treated as a data CD.)

So extrapolate using the formula from the documentation that says CD+G uses 6 extra bits per 24 bytes of audio, then we can come up with more accurate estimate of the "capacity" for CD+G:

Audio_capacity + Audio_capacity * (6/8) / 24

Or more precisely, the CD+G would be exactly %3.125 percent larger than what the corresponding audio CD has.

So I'm wondering if maybe it would be more accurate to say the "capacity" is "%103.125 of Audio CD". That might make more sense than a fixed number, considering that CD+G is an *extension* of audio CD format. — Preceding unsigned comment added by Em3rgent0rdr (talk • contribs) 03:41, 26 March 2022 (UTC)


 * I'm looking at, and see there is even a "900 MB" version of CD-ROM, which is quoted to provide 99 minutes of audio. If that is the case, then presumably CD+G could be used on that to squeeze out an extra %3.125 of graphics. Em3rgent0rdr (talk) 03:55, 26 March 2022 (UTC)

TurboGrafix-CD and Turbo Duo
As far as I know the Turbografix-CD Drive for the Turbografix-16 was the first gaming device that could play CD+G discs and output the graphics. If I'm not mistaken, the Turbo Duo kept the compatibility as well. I did own the TG-16 with the CD Drive add-on and can confirm the Jimmy Hendrix CD+G disc did output a slideshow of different pictures while playing the audio. Citation may be needed for the Turbo Duo 96.55.197.218 (talk) 20:40, 12 November 2022 (UTC)