Just some info I got over at Akai and my own observations on multis.
From my talks with Akai, it seems that corporate strategy decided was that the groove machine direction was were they wanted to go after the 4k. Confirmed by Akai and several posters on the board such as scd also. Phrase sampling with timeslicing functions are the main strengths of the MPC sampler series in a world of software studio samplers. Remember Akai no longer makes hardware samplers and they seem not to be planning another sampler engine to compete with the software as many third party library publishers make DVDs and CDs for the likes of Kontakt, EXS, and etc.
Since the 4k seems technically the last studio sampler combo mpc that Akai has produced. Many users that uses multisampling functionality continue to support the unit. There are some differences between software samplers and the 4k but also there are alot of great similarites as the 4k is capable in the hands of many users creating patches and sounds on par with the software samplers once the user understand the principles of using Multis, keygroups, velocity switching, tilt velocity, and assigning sources and destinations matrix.
Really using a Logic EXS and the 4k is on the same scale though I don`t personally don`t have an extensive sample library for the 4k like I have for my Logic EXS hence I design custom sounds from anything from synth waves, train station drones, to old 80s keyboard synths like korg M1. Since I`m not using traditional sounds like grand piano and the like ( I leave that up to my EXS and Kontakt libraries) I just reverse engineer all the techniques I learn from the months from Ableton sampler, (Spectrasonics Omnisphere deep techniques on sound design) and try to come up with my own that I learn from them. Hence I enjoy the use of a full sampler learning that all full multisample samplers have a multi that is a basic part of sampler design going back to the S1000 series abet each unit and each manufacturer gives it different names.
Groove machines from the electribes, mv, RS, to almost all mpcs basic focus it on groove phrases and drum loops the cornerstone of dance music from house, hip hop, techno, electronica to pop. With workstations providing the multisamples and synth sounds so in this kind of climate Nuakai when with the new combo of groove machine with a synth logical step as that is the dominant sound in the current state of music today. If that was my mantra also hell yeah I would go with just a groove machine also.
It is a smart move by Akai to stay alive and vibrant in the competition but it seems that the software makers are doing the same providing hardware synergy with software samplers that mind you still use multis also. Which is exactly us 4k holdovers have been decrying to have in a new mpc 6k like you said before. But my akai contact says it is likely not going to happen

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All the same, for me at least to create custom patches and sounds it what the true strength of multi to give users more choices of sounds to use and isn`t that what a sampler is for to sample anything like striking a wine glass and spanning the sound over a key group set at tilt velocity -50 on channel 1A and assigning another sound of wind chimes layered with a synth sound spanned over its own key group split also with a velocity (not tilt) +50 assign to channel 1A in the multi each with different panning, levels, and the whole nine with effects to come up with a sound you can say it your own.
All manufactories still make and use multis from Roland, Yamaha, Korg, you name it. It is the same basic multi-sampler basic just depends on the end users doing it themselves or relying on preset patches the company provides.
Renegebliss gave great and excellent examples already on how to use multis along with mcsmooth on making a synth patches sounds, and buzziman posts on creating custom sounds. It is there to see just depends whether the user want to use the tools or not. Can`t really blame the company for anything. A sampler never truely gets dated because you can put in the sounds you want and create what you want whether its automated for us or we have to do it all by hand.
