Alsa loopback example does not work in release mode

[steckes]

Bug Description

When I run the loopback example in release mode on Linux, the audio input does not work and the peak meter stays at -inf. Running a development build works fine.

Steps To Reproduce

Works: cargo run --example loopback
Does not work: cargo run --example loopback --release

Expected Behavior

Peak meter should detect input signal in release build and input audio should play on output device.

Actual Behavior

Peak meter stays at -inf and no audio is audible on output device.

Environment

• OS: Fedora Linux 42 (and tested on current Raspberry Pi OS)
• Audio driver (enable info logs): alsa
• Rust Version: 1.89.0
• Project Version/Commit (see Cargo.lock): 0.1.0 / 7f73ef5

Additional Context

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Possible Solution

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