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Re: [xpantastic] Re: Xpander ROM disassembly

2018-06-14 by PeWe

Hi Karl !

A bit O.T. but ...

Assigning MIDI CCs to Xpander-parameters like VCF cutoff and MIDI volume works on my Xpander uising the MIDI Controls page.

The limitation are the modulation busses,- pedals #1 & #2 and levers #1 & #2,- which isn\ufffdt enough, especially vs. the count of modulation destinations in the mod-matrix.
So, when there were a chance maxing out modulation busses in the sense of mod-sources, that would be most excellent.

There\ufffds a bug in Multipatch-Mode when changing multi-patches via MIDI PrgCh. while MIDI CC#07 is assigned to "pedal #2" as a source and a value is being received.
The volume drops to zero then and it needs another MIDI CC#07=127 command to get some noise back from the synth.

I\ufffdm pretty sure it\ufffds a bug because "lever #2 and "pedal #2" are "universal" (global) controllers while lever and pedal #1 work individual for each voice.
So, in Multipatch Mode, MIDI CC#07 should be the master volume controller which should work when sending a program change and volume offset command,- but it doesn\ufffdt because there\ufffds no guarantee, the volume command arrives after the program change in exact sequential order when being transmitted from p.ex. a MIDI processor/matrix switcher or masterkeyboard.
A sequencer might handle that different compared to the devices mentioned above though.

In addition to the "master volume" functionality in "Multipatch-Mode", individual / relative volume control (not overriding MIDI CC#07 value !) for each voice should work using MIDI CC#11 together w/ MIDI CC#07 and w/o dropping overall volume to zero.
But even when we can get rid of the bug mentioned above, in Multipatch-Mode using MIDI CC#07 and MIDI CC#11 simultaneously eats up both pedals as modulation sources and makes it impossible using MIDI CC#04 for filter cutoff, may it be per voice or global,- WHEN the mod wheel is in use for vibrato p.ex..

So, the Xpander/ Matrix-12 needs more modulation busses/channels on the modulation-input side.
I dunno if that\ufffds doable via software at all, but it would be great if it were.

Anyway,- now some private stuff and because it\ufffds the occasion to send some lines ...

I received and still do receive all your emails, but when I reply, ALL the emails I send to shire03@... come back to me as a mailer demon after exactly 4 (FOUR !!!) days.
I regret and have no idea what causes that behaviour, but we should try to find another way for private communication I think.
Maybe PMs @ Keybd Corner ... (???) ... what do you think ?
Please reply to my private email addy 1st.
When you agree, you might post something over there,- I\ufffdll recognize and will jump in via PM.
Let me know please.

thx for reading

:-)

PeWe
\ufffd

Am 14.06.2018 um 00:02 schrieb Karl Schmeer shire03@... [xpantastic]:
\ufffd

I would love to "enhance" the original code to allow some midi cc of parameters like filter, envelope times etc.. As well as allow midi volume control (cc #7).
Best Regards


Karl




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