How to use SelemId::new? about alsa-rs HOT 3 CLOSED

You can also use Mixer::Iter to get a list of all Elem/Selem. https://docs.rs/alsa/latest/alsa/mixer/struct.Mixer.html#method.iter

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Strange: on my hw:1 device (which is not the scarlett), its working:

let c = Card::new(3);
println!("{:#?}", c.get_name());
println!("{:#?}", c.get_index());
println!("{:#?}", c.get_longname());

let mixer: Mixer  = Mixer::new("hw:1", false).unwrap();
let sid: SelemId  = SelemId::new("Capture", 0);


let selem: Selem = mixer.find_selem(&sid).unwrap();

"thread 'main' panicked at 'called Option::unwrap() on a None value', src/main.rs:16:47"

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Now i got it on my own:

The code was okay, I recognized that my HW:3 (Scarlett device) has no element with the name "Master". Instead it has e.g. "Line 01 (Monitor L)".

I found the element names inside of alsamixer. Press F6 to change the soundcard.

Thanks anyway!

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