Allow configuration of audio with user friendly parameters

[riban-bw]

Is your feature request related to a problem? Please describe. In webconf you can reconfigure the audio interface by first selecting custom then entering some cryptic parameters into the jackd configuration field. It would be better if we could set parameters in a user friendly way.

Describe the solution you'd like Allow user to select parameters like:

• Soundcard
• Samplerate
• Buffer size

Describe alternatives you've considered The wiki can describe the parameters but it is often a source of confusion.

Additional context The soundcard selection could automatically populate the hw: element of jackd config. We could have a database of configuration to assist users.

[jofemodo]

Note that not all buffer sizes and sample rates works for every soundcard. Anyway, it think it could be interesting to have these 2 parameters in separated fields. Not for now, OK? This is the typical change that you enter the rabbit hole and ups!!! it's a lot deeper than you thought!! This has not been changed from the very beginning, so we should be prepared to have some surprises, or perhaps not ...