Restore smooth realtime fall ballistics

src/audio.rs

@@ -40,6 +40,7 @@ use crate::{
     model::{InputSource, MeterFrame, PhoenixRtaConfig},
 };
 
+#[cfg(not(target_os = "linux"))]
 const PLACEHOLDER_UPDATES_PER_SECOND: u32 = 120;
 
 #[derive(Clone, Copy, Debug, Default)]

src/goniometer.rs

@@ -1,10 +1,12 @@
 //! Timing and sample-selection helpers for the realtime goniometer stream.
 
+#[cfg(test)]
 #[derive(Clone, Debug, Default)]
 pub struct GoniometerClock {
     phase: u64,
 }
 
+#[cfg(test)]
 impl GoniometerClock {
     /// Returns true at the first capture boundary after the next display tick.
     /// The fractional phase is retained, so the average rate is independent