Midi Processors with Octatrack

[subduct]

Thanks @CrepePants, like it, roll your own.
I’d discounted bomebox because I wanted more I/O but maybe I can’t in a single box.
I was just starting to look at the Blokas midihub…

Midihub - MIDI Interface & Stand-Alone MIDI Processor

[EDIT] This actually looks like it could do everything I want. This is a video of mapping several CCs to one CC input, including limiting and rescaling the outgoing CCs to get different responses per CC to the same change on the incoming CC. That’s MIDI scenes for OT with a lot of control if I’m right?

Sending Multiple MIDI CC Messages with One Knob Using Midihub

[sezare56]

@Wulli

So the SPP message will change to the pointed position instantly or does it adhere to a structure

SPP values corresponds to 16ths (steps values).
Can’t explain, I don’t remember wtf I did, but it worked.
SPP messages with midi controller? - #22 by sezare56

[Supercolor_T-120]

NM, forget what I recommended here. See my next post!

[Supercolor_T-120]

I don’t know much about this but it looks really good:

Midihub - MIDI Interface & Stand-Alone MIDI Processor

[Merv]

Midihub has a lot of potential that I haven’t properly explored yet. Multiple CCs w/ ranges on a single knob is certainly possible @subduct. Here’s a post where I detail my initial experiment with using midihub to create an extendable, trigable 16 step CC sequencer for OT:

Blokas Midihub

Ok, here’s what’s going on! Extendable 16-step MIDI CC sequencer Every time a note is triggered on this MIDI channel, also send a CC with value equal to one of 16 unique steps. You can alternatively replace the note with the CC, and customise each step with additional MIDI filters. Use case Use CC#17 to change STRT on the OT in order to step through a sequence of slices that is disconnected from the main sequencer. With the way the pipes are set up, unfortunately you cannot change the CC o…

It’s serviceable. The pipe for each step is completely separate, meaning you could have each step affecting multiple different CCs if you wanted to. Haven’t messed around with the latest firmware but hopefully they improve some things, for example you can’t change specific CC targets outside of the editor last time I used it. But yeah, for sure worth a look in i’d say

[sezare56]

@Wulli

So the SPP message will change to the pointed position instantly or does it adhere to a structure, e.g. after the current played pattern is done?

That what I think, unless there’s some native workarounds.

Btw I found a midi processing trickery sending OT step position with a chromatic note sequence converted as a variable corresponding to a step position.
Clumsy example, not simple script, but it worked…

OT midi loopback, randomization of rows with random notes on step 5 and 13, direct jump.
Same pattern with 4 different scenes.

Octatrack MEGARRANGER! Demo test

[subduct]

@Merv

Midihub has a lot of potential

Definitely! Thanks for the link. I want to look into it more over this weekend but I checked some of the Cylvester videos on the Blokes site, it can enable loads of stuff:

• polyphonic OT
• remap notes to CC and sequence e.g. filter cutoff - could also do program changes (solves the OT-Rytm PC issue)
• Multiple CC out from one CC in (OT MIDI ‘scenes’)
• Ccovers my merge (OT and Faderfox EC4) plans and adds more ports. I could add back into the setup MPC for pads and keyboard for notes input. I would need a bigger desk though
• Duplicate/modify single MIDI sequence to multiple channels
• Add more MIDI LFO (generates them too)
• Possibilities to control it realtime with EC4?
• Possibilites with generative MIDI?

The forum has good activity and you would expect it to gain features/pipelines since it’s software/editor based. Developers look responsive. For the price it looks well worth a buy & try.

[Supercolor_T-120]

You could do all that and more with a Raspberry Pi running Puredata and a 4x4 class compliant USB interface, but it wouldn’t be nearly as convenient.

[Dataflu]

Definitely Midihub is powerful. I use it with two midi thru boxes and it cover all my needs and more!

[mr_bernard]

That is a really nice build. I can’t quite tell, but I’m assuming it’s a 1U rack?

[Dataflu]

Yes exactly, this one:

Adam Hall 87407V Rack Housing 1U vent.

[Supercolor_T-120]

If you don’t need to do really complex processing and just need routing, filtering and channel remapping, you really can’t do much better in terms of price:performance than an old MOTU Midi Timepiece II, which you can pick up for $50 or less pretty easily.

[Wulli]

OK, I did some further research, seems to be changing on a 16th note grid, not whole bars (which would make sense based on the 16th resolution of SPP messages). So I’d need to trigger the OT from the DT. The decision to get an OT moves closer

Does maybe someone know if there is a way to send a MIDI command to OT to activate arranger mode or to change from one arrangement slot to the other (of the eight available)?

Cheers, Wulli

[sezare56]

@Wulli

seems to be changing on a 16th note grid

Yep. 1 SPP MSB value is 128 steps (16th).
In Arranger you can determine ROW length, so you can control per row with SPP MSB if they last 128 steps (16th).

AFAIK no other control of Arranger than Play/Stop/Continue and SPP.

[nerow]

I have problem with Miditech thru box and Octatrack. I have OT about one year with thru box and HW synths and everything OK. But when I connected from OT MIDI out Thru box to control DAW, Android synths app etc., and Octatrack made move with crossfader from B to A, it made random CC changes in DAW. When I controlling DAW with OT directly from Midi Out it is working fine. Problem is only via Thru box and only with that DAW etc (MIDI to USB cable). Any ideas where is problem?

[sezare56]

@nerow

Octatrack made move with crossfader from B to A, it made random CC changes in DAW

OT sends CC48 with crossfader. You can disable it in
MIDI > CONTROL

[nerow]

Many thanks, it works. But I don’t get it, why sending via thru box more than CC 48. Via thru box crossfader sends randomly all CC from 0 to 127.