Re: Not recording controllers

Thank you for this clear explanation, i'll be aware of it when i'm back into working with midish.
Hope together you'll find a solution for Julien's setup !

Le 9 déc. 2012 à 23:06, Alexandre Ratchov a écrit :

> On Sun, Dec 09, 2012 at 10:11:58PM +0100, gorest wrote:
>> Hello,
>> 
>> a bit offf-topic, but your answer really surprises me
>> 
>>> 
>>> controllers 32-63 are not valid, they are defined as the lower
>>> nibbles of controllers 0-31. Especially 32 and 38 are used for bank
>>> select and data entry and using it for anything else is likely to
>>> break synths.
>>> 
>>> For instance if midish receives controller 36, it keeps it in
>>> memory until it receives controller 4, and then combines both
>>> values into a single event. So, if the lower nibble (36) is
>>> received without the matching higher nibble, no event is generated.
>> 
>> Do you mean that today midish, always consider the 32-63 CC range
>> as specific ?
> 
> yes; well, that's configurable, but still the code isn't smart
> enough to handle Julien's setup.
> 
>> To my knowledge, this is not the midi standard. could you explain
>> a bit more ?
> 
> controllers 32-63 are lower bits of continuous controllers 0-31;
> For instance, the modulation is a 14-bit number transmitted as two
> MIDI controller messages: controller 1 containing 7 higher bits
> and controller 33 with 7 lower bits.
> 
> Devices that use only 7-bit precision (most) are allowed to
> transmit higher 7 bits only (ie CC 1 in above example) and
> similarly receivers must be able to handle such cases.
> 
> In real world, CC 0 (bank select) and CC 6 (data entry) are 14-bit
> on most (all?) post-1995 devices, while other CCs are 7-bit.
> 
> What could do a 14-bit receiver that never received higher bits,
> but receives lower bits? It has no other choice than to ignore
> lower bits until the higher bits arrive. That's why most MIDI
> synths don't bind CC 32-63 except for lower bits of 14-bit
> controllers. Another example, what would happen if a 14-bit
> controller sends a 14-bit expression (CC 11 & 43) on a synth that
> uses CC 43 for something else.
> 
> Anyway there are synths that (ab)use controllers 32-63 for other
> purposes, and midish must provide a the right option to handle
> them.
> 
> This page explains it:
> 
> http://home.roadrunner.com/~jgglatt/tech/midispec/ctllist.htm
> 
> HTH
> 
> -- Alexandre
>