[alsa-devel] Focusrite 6i6 invalid PCM device "front"

# Background I can't seem to use any of the PCM device list defined automatically for my [Focusrite 6i6 device][1]. I tested this using `speaker-test`.

# Tests:

## `speaker-test` output comparing between using [`sysdefault`][2] and [`front:USB`][3].

The `sysdefault` device emits sound for all of the formats, except for FLOAT_LE 44100Hz and 48000Hz. While front:USB doesn't emit anything at all.

[1]: http://www.alsa-project.org/db/?f=b1c10accc89cd34dfdeb0d61b087a3cf413ea1a0 [2]: https://gist.githubusercontent.com/ramonmaruko/deb1918efa27eb860aa1/raw/f7af... [3]: https://gist.githubusercontent.com/ramonmaruko/1377846e39a7a6acd72f/raw/4d6e...