In Crossover 18, I solved the audio issue of Metro 2033 Redux installing the pack "DirectX for modern games" and then, doing a DLL override in the Crossover wine config with "Xaudio_2_7 (native,builtin)..
The Dll override can also be done editing carefully the user.reg file of the gameprefix with text editor.

[Software\\Wine\\DllOverrides]
"xaudio2_6"="native,builtin"
"xaudio2_7"="native,builtin"

 

The only problem with the Metro games running via Crossover is that the "esc" key and "alt+F4" don't work when you want to quit the game..

Quoting: PatolaWhy do you run Metro 2033 Redux in Crossover since there is a Linux version?

Because the Linux version is steam exclusive and is broken, meanwhile the Windows version is DRMFREE and looks better.
Vsync doesn't work and You can not even choose the screen resolution in the Linux version and the resolution used by the game doesn't fit with the screen.. It seems they made the Linux port it from the PS4 version and the game cannot detect properly the screen resolution.
Even if You manually modify the user.cfg file, the game will revert it to the wrong default value..

What is your version of openal? It could be [this](https://github.com/kcat/openal-soft/issues/226).

Quoting: ShmerlWhat is your version of openal? It could be [this](https://github.com/kcat/openal-soft/issues/226).

According to the console tool Openal-info, this is what I have:

Available playback devices:
    Audio Interno Estéreo analógico
    GM204 High Definition Audio Controller Digital Stereo (HDMI)
Available capture devices:
    Monitor of Audio Interno Estéreo analógico
    Monitor of GM204 High Definition Audio Controller Digital Stereo (HDMI)
Default playback device: Audio Interno Estéreo analógico
Default capture device: Audio Interno Estéreo analógico
ALC version: 1.1

** Info for device "Audio Interno Estéreo analógico" **
ALC version: 1.1
ALC extensions:
    ALC_ENUMERATE_ALL_EXT, ALC_ENUMERATION_EXT, ALC_EXT_CAPTURE,
    ALC_EXT_DEDICATED, ALC_EXT_disconnect, ALC_EXT_EFX,
    ALC_EXT_thread_local_context, ALC_SOFTX_device_clock, ALC_SOFTX_HRTF,
    ALC_SOFT_loopback, ALC_SOFTX_midi_interface, ALC_SOFT_pause_device
OpenAL vendor string: OpenAL Community
OpenAL renderer string: OpenAL Soft
OpenAL version string: 1.1 ALSOFT 1.16.0
OpenAL extensions:
    AL_EXT_ALAW, AL_EXT_DOUBLE, AL_EXT_EXPONENT_DISTANCE, AL_EXT_FLOAT32,
    AL_EXT_IMA4, AL_EXT_LINEAR_DISTANCE, AL_EXT_MCFORMATS, AL_EXT_MULAW,
    AL_EXT_MULAW_MCFORMATS, AL_EXT_OFFSET, AL_EXT_source_distance_model,
    AL_LOKI_quadriphonic, AL_SOFT_block_alignment, AL_SOFT_buffer_samples,
    AL_SOFT_buffer_sub_data, AL_SOFT_deferred_updates, AL_SOFT_direct_channels,
    AL_SOFT_loop_points, AL_SOFT_MSADPCM, AL_SOFT_source_latency,
    AL_SOFT_source_length
EFX version: 1.0
Max auxiliary sends: 4
Supported filters:
    Low-pass, High-pass, Band-pass
Supported effects:
    EAX Reverb, Reverb, Chorus, Distortion, Echo, Flanger, Ring Modulator,
    Compressor, Equalizer, Dedicated Dialog, Dedicated LFE

This looks like 1.16, so it shouldn't be affected by a bug in 1.19.