Sega MD Z80 question

[VenomMacbeth]

How many sound channels are there on the Genesis/MD's Z80?  Just the Z80, not the YM2612. I'm writing some music & wanna make sure I'm not cheating.

Here's the song I'm working on:

https://soundcloud.com/cerulean42/run-away-preview

I used 4 different square tones, like those produced by the Z80, but with the way I wrote the song, it would probably translate more to 5 or 6 channels on actual hardware.

[esteban]

Nice 

[ccovell]

The Z80 doesn't have any sound channels.  None in the SMS and none in the MD/Gen.

If you use the sound functions in the Gen's 315-xxxx VDP, you get 3 square waves + 1 noise channel.

(here: http://en.wikipedia.org/wiki/Texas_Instruments_SN76489 )

[VenomMacbeth]

The Z80 doesn't have any sound channels.  None in the SMS and none in the MD/Gen.

If you use the sound functions in the Gen's 315-xxxx VDP, you get 3 square waves + 1 noise channel.

(here: http://en.wikipedia.org/wiki/Texas_Instruments_SN76489 )

Ohhhhh that's right.  I forgot.  You totally answered my question, though.  Thanks!  Did the Genesis have access to any other additional square waves, or was everything else strictly FM?

[Tatsujin]

IIRC it had 6 stereo FM, 3 PSG and 1 Noise channel = 10 Channels in total.

[ApolloBoy]

One of the FM channels can also be configured as a PCM channel for digitized sound effects.

[Tatsujin]

Ah yeah, the MDs weakness. Only one speech sample at once.