Talk:Yamaha YM2413

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I moved this comment from the end of the article to the talkpage. Sietse 13:51, 8 Apr 2005 (UTC)

//The above fact about the Famicom game Langrange Point is not correct. That game uses a chip known as the VRC7, which (I believe) was developed by Konami in-house and used in other Famicom games, such as Castlevania III (Japanese Famicom version only). It is NOT the YM2413. The VRC7 and the YM2413 both use FM synthesis, and both sound very similar, however, that's where the similarities end. If someone wants to edit the page, and make the correction I've mentioned, it would be appreciated. Otherwise leave this message here. (VRC7 needs its own page by the way, as it has a cult following.)\\ - EchoMorphsapient

• It has been updated. By the way, the chip's proper name is "VRCVII" as this is what is actually marked on the IC on the cartridge. Look at the chip at the top of this photo: [1]. Also, a technical document on the VRCVII is available here: [2]. Thanks go to Kevin Horton for both the document and the photo. Firebug 06:02, 27 Apr 2005 (UTC)

• So, what is then the actual difference between the FM parts in the VRC-VII and the 2413? From what little other information is available on the net, they seem pretty much identical. Not to mention that with Yamaha holding the patent on FM at the time, Konami pretty much would have no other source. I suspect they simply licensed an IP core that was available and integrated it into their mapper chip, and that the VRC-VII FM parts for all intents and purposes is a 2413. -- magetoo 17:00, 17 May 2006 (UTC)[reply]

Compare [3] (vrcvii) to [4] (ym2413). They have the same register map, the same parameters, and even the same built-in instruments. The ym2413 document is more complete, but it's obviously the same chip. Thus, the "very similar, but not identical" comment could probably be cut.

Coming to this conversation much too late: The VRC7 does not use the same built-in instruments as the YM2413. The values in Kevin Horton's table do not correspond to the values used by the YM2413 or the YMF281. See bizhawk's source —Lidnariq (talk) 02:08, 18 February 2014 (UTC)[reply]

• When this soundchip was released? —Preceding unsigned comment added by 201.22.54.10 (talk) 20:45, 6 February 2011 (UTC)[reply]

--- Recently it was discovered that the official YM2413 Application Manual has an error in the circuit reference design, and many implementations copied this reference design. The error results in a muffled/dull sound. See here for how to fix this issue: https://www.msx.org/news/en/ym2413-application-manual-correction-and-cleanup Should this be mentioned on the main page? — Preceding unsigned comment added by 83.222.47.226 (talk) 13:10, 18 August 2017 (UTC)[reply]

Yamaha PSS-140 contains a YM2420, which is a variant with slightly changed registers, used in Yamaha's own home keyboards (intentionally undocumented to avoid hardware piracy). Also SHS-10, SHS-200, VSS-200 used that chip. (Possibly earlier versions of these keyboards indeed had an YM2413.) - CYBERYOGI =CO=Windler 92.196.11.88 (talk) 01:00, 25 September 2017 (UTC)[reply]

It's a small point but I can't seem to find any contemporary reference to these before 1987. Are we sure they're from 1986? the source of these claims seems to be a throw away comment from the 8-bit keys guy, but i can't find anything in writing.Mechafatnick (talk) 07:03, 14 March 2021 (UTC)[reply]