Re: Firewire Audio Interface

[Takashi Sakamoto <o-takashi@sakamocchi.jp>]

Hi,
(C.C.ed to alsa-devel)

On Wed, Feb 22, 2023 at 11:51:23AM -0500, mj@mj wrote:
> Hey man thanks so much for the reply!
> 
> Why TC put the phantom switch in the software instead of on the
> hardware unit I can’t figure out!
> 
> I think I’m just going to use it a 2-in 2-out interface without
> the phantom.
> 
> A friend of mine looked at the circuit board and told me it
> would be too difficult to put a switch for the phantom power in it.
> 
> Thanks again for the reply!

If it is Desktop Konnekt 6, node offset 0x'ffff'e0a0'103c has the 32 bit
value to express the state of phantom powering. If it is 0, disabled, else
enabled. Quadlet write asynchronous transaction can change the state, but
I have never used MacOs to operate any node in IEEE 1394 bus.

I know some developer and user for the craft driver; e.g.

* Re: [alsa-devel] Tascam Coding Inquiry
  * https://lore.kernel.org/alsa-devel/20200108095430.GA16741@workstation/

I think it your help to contact to them. Especially Paul Neyrinck[1] seems
to complete his work for the craft driver of Digidesign Digi 002/003
family in MacOS. They are different hardware from yours, while he will
help you to execute the simple read/write transaction to a certain
offset of it.


[1] https://neyrinck.com/

Regards

Takashi Sakamoto