I've now got my Yamaha Tyros One out of storage, It has 10 Mega Voices (samples which use velicity mapping as a type of storage per note, instead of just keymapping, used mainly for programing and sounds very authentic, the Tyros One only has guitars and basses). It has Live voices which are General MIDI 2 AWM sounds, it then has Sweet! and Cool! sounds which are MIDI 1 AWM sounds.

It has a HDD, with 16 track MIDI recorder, it has full sound manipulation via the PC, and has seven blocks of DSP which can be used on different channels, with full manipulation of the EFX DSP presets. I has very good DX-7 emulation, as well as CS-80 and other Yamaha electric pianos. I purchased it as a synthesiser and even though its limited compared to a Yamaha Motif, this thing is built like a tank, and I purchased it in 2003, made in 2001 and is still going strong today, minus the built in vocal harmony and autotune function. 

I mainly got it out as I made a lot of styles for playing live and thought it might help me as a arrangement aid, and I have been making Sequenced copies of older work, throwing it into cubase then using the Tyros as a Sound module of sorts. I'm just about getting my head around the Mega Voices. 

Its an older keyboard has its quirks and a bit of a odd ball keyboard, which isn't like the amazing Tyros 5 of today which has super articulation, sampling of it own or onboard tweaking of synthesis, or its not like the synths of the 80's which people mop up on eBay these days, for rediculous prices.