[PD] Help with Jack and PD

[Rishabh Natarajan]

Thanks for writing to me Michal.

I guess after doing some experimentation with Jack and pd I seemed to have
arrived at some of the conclusions you've mentioned here :)

I will keep working on it.

Regards,
Rishabh

On Fri, Apr 20, 2012 at 7:16 PM, Michal Seta <mis at artengine.ca> wrote:

> On Thu, Apr 19, 2012 at 9:49 AM, Rishabh Natarajan <
> rishabh.natarajan at gmail.com> wrote:
>
>>
>> 1. When starting pd with jack and 16 channels, does this mean that all 16
>> channels have to go in and out of Jack itself?
>>
>
> no.
>
>
>> 2. Do the number of input and output channels have to be the same (8 and
>> 8 in this case) or can they be different?
>>
>
> they can be different.
>
>
>> When I tried starting pd with 18 channels and then assigned 16 to Jack
>> incoming and 2 to built-in output for outgoing, terminal threw an error
>> saying 'invalid number of channels'
>>
>
> I am not sure on this one but I think that if Pd does not find as many
> physical (or jack) inputs or outputs it will warn you. When you do provide
> enough IO you can reconfigure Pd for the new values and it should work (if
> you cross your fingers).
>
> 3. I want to have 8 channels from one adc~ and another 8 from the other.
>> This means all 16 channels are meant for input. How then do I route output
>> from pd to the speakers?
>>
>
> you specify -audioindev 1,2 for example. You can specify -audiooutdev in
> the same way and then you create the appropriate [dac~] objects. BTW, I
> believe you can create aggregate devices on Mac (somewhere in the sound
> preferences, I believe JackPilot manuals mentions that) to combine
> different audio inputs and outputs. I vaguely recall doing something like
> this in the past. Then you tell jack to use your aggregate, this may
> simplify your setup routine...
>
>
>> 4. If I am only inputting 16 channels through Jack can I use the dac~
>> object to output sound from pd to the speakers?
>>
>
> if you run jack (and pd with -jack) then your [dac~] objects can be
> connected to jack's outputs, i.e. Pd's inputs and outputs will appear in
> JackPilot and you can route them any way you want to your system provided
> I/O. Assuming that JackPilot uses the actual physical I/O, you should be
> able to output sound from Pd to the speakers.
>
> HTH,
>
> ./MiS
>
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