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DSI Mopho Keyboard + Tetra : polychain and more. first impressions
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Old 16th June 2012   #1
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DSI Mopho Keyboard + Tetra : polychain and more. first impressions

I recently purchased a mopho keyboard to have a solid, reliable,
ligthweight and decently sounding analog mono for playing live.
Then I got curious about the polychain feature with a Tetra,
which would have allowed me to have a very portable polyphonic analog solution.

I bought a very small art passive mixer (very useful box IMHO)
and 3 y cables to be able to run both mopho key and tetra out of a single stereo pair.
the whole thing fits in quite a minimal place.

Then I started testing some of the possible interactions between the two machines
and I'm quite impressed by them:
a 5 voices polyphonic mopho keyboard is very easy to set up
and feels really nice and alive when played,
something very different from the mono mopho playing experience.

but there's even more than the 5 voices polyphony thing
when teaming up a mopho key and a tetra togheter:

the tetra is a nicely sounding and very compact analog synth
but such a small interface means that properly tweaking the right sounds out of the box could result in quite a lot of headaches
or a lot of mouse clicks on a software editor...

mopho key and tetra share 99% of the signal architechture
so you could think at the mopho key as the best possible hardware controller for your tetra,
which really opens up a lot of possibilities for the small tetra box.

plugging both units to your DAW via usb or midi
and turning off the local control on the mopho keyboard
allows you to have both your mopho and your tetra running tracks separately
and to tweak both of them on the fly
using the knobs and keys of your mopho keyboard to tweak and control both devices separately. not bad.

you could also have 5 separate monophonic tracks out of the mopho and the tetra at the same time,
each one with its separate audio out
and all of them still easily tweakable on the fly using the same mopho keyboard controls for every one of the 5 synth sounds.
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Old 17th June 2012   #2
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Congrats! Someday I will pair my mokey with a tetra.
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Old 17th June 2012   #3
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Great! Now, buy more tetr4's.
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Old 17th June 2012   #4
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Love the sound of the MoKey's sub-oscillators. Very distinct sound. Nice envelopes too. On my wish list.
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Old 17th June 2012   #5
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I got the MoKeys and was wanting to buy a Tetra for it.
But I dont know.. 5 voices will not be enough to make chords.
I also have a Slim Phatty and I use it way more than my MoKeys because I think the SP's bottom end is phatter.
I was thinking about selling the MoKeys to buy a poly that I can make chords with but IDK which one.
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Old 17th June 2012   #6
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Quote:
Originally Posted by TYPHY View Post
I got the MoKeys and was wanting to buy a Tetra for it.
But I dont know.. 5 voices will not be enough to make chords.
I also have a Slim Phatty and I use it way more than my MoKeys because I think the SP's bottom end is phatter.
I was thinking about selling the MoKeys to buy a poly that I can make chords with but IDK which one.
You can do a set of 3 and 2 note chords or one 4 and a single note. If you want a pair of 3 or 4 note chords yeah you're looking at the wrong product. Prophet 08? I don't really play piano so 5 note polyphony will be plenty for me. Btw you can chain a P08 desktop to that Mopho KB for a 9 voice.


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Old 18th June 2012   #7
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unless we're talking about overlapping chords with a very long release
or cluster chords
5 voices are enough for more complex chord voicings than 90% of the electronic music ever produced.
even in classical music is very difficult to see chords containing more than 5 different harmonic functions at the same time.

of course more than 5 notes polyphony would have been better
and I'm not telling that the mopho is in the same league of an odyssey or a prophet 5 (even if the filter FM modulation with osc1 gives to the polychained mopho quite a prophetesque flavour)

but I've been very impressed when actually playing an easily tweakable polyphonic analog of such a compact size,
as I would surely have been if playing a 5 voices little phatty.

then being able to choose how to use the different voices (5 voices poly, 1 mono+4 poly or 5 individual monos) lies in the nature of the combo
but it anyway comes in as a nice bonus that other polys do not offer.
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Old 18th June 2012   #8
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Editting Possibilities

I have a tetra, but not the mopho keys. I'm interested in learning more about the editting possibilities before I purchase the mopho.

Is it better to dump the programs of the Mopho onto the Tetra or vice versa? Is it possible to have 5 voices both ways? Not having heard the difference in sound between the factory patches of both instruments, I'm curious if you think there would there be any advantage to one over the other? What is the default mode if you do not do any dumping at all?

I understand that you cannot play stacked programs or combo patches with all 5 voices, that you only get the Tetra's 4, but can you fully edit them from the Mopho? (I know about the feedback not being savable)

Bascially, can you edit the "combo" patches on the Tetra from the Mopho? Also, is it possible to build sequences from the Mopho and save them into the Combo banks of the Tetra?

That's alot of questions. Still trying to navigate all the lingo.
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Old 19th June 2012   #9
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Quote:
Originally Posted by bandoneonabandon View Post
Is it better to dump the programs of the Mopho onto the Tetra or vice versa? Is it possible to have 5 voices both ways? Not having heard the difference in sound between the factory patches of both instruments, I'm curious if you think there would there be any advantage to one over the other? What is the default mode if you do not do any dumping at all?

I understand that you cannot play stacked programs or combo patches with all 5 voices, that you only get the Tetra's 4, but can you fully edit them from the Mopho? (I know about the feedback not being savable)

Bascially, can you edit the "combo" patches on the Tetra from the Mopho? Also, is it possible to build sequences from the Mopho and save them into the Combo banks of the Tetra?

That's alot of questions. Still trying to navigate all the lingo.
as I said tetra is a cool box, but being able to edit its parameteres in real time with a mopho keyboard opens up a lot of tetra's potential.

if you want to have a 5 voices polysynth you connect the mopho key's polychain output to the tetra's midi input. you dump the mopho program to the tetra so that both instruments play the same patch (very easy to do). then you forget about the tetra and do all of the editing on the mopho key (when you save a patch on the mopho while polychained, it also saves the same patch to the tetra).

if you want to use your mopho key as a hardware controller for the tetra (edit single combo or multi parts), you can turn the local control to "off" on the mopho (so that you don't change your mopho patch while using the mopho to control the tetra) and do the midi routing with your daw:
you set up a track with "DSI mopho" as midi in and "DSI tetra" as midi out.
you have to choose the right midi receive channel for the tetra, depending on which voice you want to control from the mopho.
in this way the mopho sends NRPN parameters to the tetra and since the two share the same signal flow, to each and every knob or button on the mopho key corresponds a sound change in the tetra.

as for building sequences on the mopho and saving them on the tetra
I honestly don't know, I still didn't check it out.
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