Re: [iiwusynth-devel] Multi channel output and number of midi channels

[Peter Hanappe]

M. Nentwig wrote:
> Moi again,

Hi Markus,

> my proposal:
>
> - Implement the multi channel function as you explained (channel
> wraparoud)
> - Implement the multi-aux bus structure as you proposed, stereo,
> including chorus and reverb in their places according to the MIDI
> standard
> - By default mix the aux returns to 'physical' output 1 and 2
> - By default the MIDI channel 'modulo' number and the number of physical
> channels are the same (as in your mail).
> - The mixing is implemented outside of the LADSPA Fx unit, which can be
> left out of compilation as before.
>
> Now my additions: If LADSPA is compiled in
> - The MIDI channel modulo factor is arbitrary
> When LADSPA is turned off (at runtime), proceed as above.
> When it's turned on (at runtime):
> - The wrapped-around MIDI channels appear as single-channel inputs in
> the LADSPA Fx unit
> - The Aux ways appear also as inputs, in stereo.
> - Chorus and reverb appear on their respective aux ways if enabled. If
> disabled, the clean signal is fed through instead.
>
> This way we get the advantages of both ideas:
> - For the average user, the similarity to a HW mixing console makes
> things easier
> - 'Power users' can use LADSPA like 'Reason' as a patch bay to build the
> Fx rack of their dreams.
> - If somebody needs the 'lean-and-mean' version, he compiles without the
> LADSPA option, default anyway.
>
> What do you think?

That is fine for me. I can commit a version with the multi-channel
output this evening. Only the JACK driver is currently multi-channel
aware (I don't have the RME multiface ;). You can then see if you can
work with that. The additional aux buses are not implemented yet,
however, the API and the code somehow shows how it'd be done.


> PS: The documentation for the Fx unit actually exists, I wrote it
> together with the code. Let's see if I can find it still.

I still have it.

Lates,
Peter

> Cheers
>
> Markus