search

alsa-project / snd-firewire-ctl-services

A set of server programs for audio and music units on IEEE 1394 bus supported by Linux sound subsystem a.k.a. ALSA.
GNU General Public License v3.0
35 stars 5 forks source link

Fireface 802: `input:mic-power` and `input:mic-instrument` don't appear to be working as intended #44

Closed Schroedingers-Cat closed 1 year ago

Schroedingers-Cat commented 3 years ago

The Fireface 802 has a three-state LED per Mic input indicating the status of the input. It can be in the states off, 48V or Inst. These states are taken from the manual: https://archiv.rme-audio.de/download/fface_802_e.pdf (page 57). The manual doesn't mention that these states are mutually exclusive, it also doesn't mention that the LED will show a different colour for 48Vand Inst.. If both settings are off, the LED will stop emitting light.

This repo's service exposes these settings of the Fireface 802 via the input:mic-power (48V) and the input:mic-instrument (Inst.) mixer property. However, setting any of these options doesn't cause the LED on the mic inputs to emit light.
Furthermore, this repo's service allows to set both properties input:mic-power and input:mic-instrument to true at the same time, which is not supported by the RME driver on Windows. For instance, setting the input:mic-power property of channel 9 to true should set the input:mic-instrument property of channel 9 to false if it was true before.

takaswie commented 1 year ago

Hi @Schroedingers-Cat

I apologize long delay to start working for the issue, but I need to take my time for the other relevant problems...

However, setting any of these options doesn't cause the LED on the mic inputs to emit light.

Indeed. I find the misprogramming that the index of channel in generated command is invalid. The index should start at 8, but currently at 0:

https://github.com/alsa-project/snd-firewire-ctl-services/blob/master/protocols/fireface/src/latter.rs#L721

I push a remote branch as topic to the issue. The fix is at the top-most commit of the branch: https://github.com/alsa-project/snd-firewire-ctl-services/tree/topic/ff/fix-mic-inputs

If I can still get your help, would I ask you to test it and confirm the above bug is fixed?

Furthermore, this repo's service allows to set both properties input:mic-power and input:mic-instrument to true at the same time, which is not supported by the RME driver on Windows. For instance, setting the input:mic-power property of channel 9 to true should set the input:mic-instrument property of channel 9 to false if it was true before.

Exactly. As long as I tested, enabling instrument mode turns off phantom powering, while the control elements added by the service program doesn't handle the case property. Let me leave it in my TODO list.

Thanks

takaswie commented 1 year ago

I file the fix at #144 .

takaswie commented 1 year ago

44 is merged. Let me close the issue since expecting no reactions.

Schroedingers-Cat commented 1 year ago

I sold my Firewire card and cable because I experienced audio artifacts with this driver, so I cannot test/verify the changes anymore. Really sorry, but great to hear that it's fixed now!