From ab86c7abd286251238260d61da3249d18a5f9a18 Mon Sep 17 00:00:00 2001
From: Simon Gellis <simongellis@gmail.com>
Date: Thu, 5 Feb 2026 23:06:48 -0500
Subject: [PATCH] Fix underflow when playing with speedup

---
 src/audio.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/audio.rs b/src/audio.rs
index b095b77..7f84346 100644
--- a/src/audio.rs
+++ b/src/audio.rs
@@ -81,7 +81,8 @@ impl Audio {
 
     pub fn update(&mut self, mut samples: &[f32]) {
         while self.input_buffer.len() + samples.len() >= self.sampler.input_frames_next() * 2 {
-            let samples_needed = (self.sampler.input_frames_next() * 2) - self.input_buffer.len();
+            let samples_needed =
+                (self.sampler.input_frames_next() * 2).saturating_sub(self.input_buffer.len());
             let (current_samples, future_samples) = samples.split_at(samples_needed);
             self.input_buffer.extend_from_slice(current_samples);
             samples = future_samples;