diff --git a/src/helpers.rs b/src/helpers.rs
index 77ddf91..d139701 100644
--- a/src/helpers.rs
+++ b/src/helpers.rs
@@ -40,11 +40,19 @@ pub fn open_card(card: &str) -> alsa::ctl::Ctl {
     return ctldev;
 }
 
-pub fn open_pcm(dev: &str, chans: u32, sample_rate: u32) -> alsa::pcm::PCM {
+pub fn open_pcm(dev: &str, chans: u32, mut sample_rate: u32) -> alsa::pcm::PCM {
     let pcm = alsa::pcm::PCM::new(dev, alsa::Direction::Capture, false).unwrap();
     {
         let params = alsa::pcm::HwParams::any(&pcm).unwrap();
 
+        let rate_max = params.get_rate_max().unwrap();
+        let rate_min = params.get_rate_min().unwrap();
+        println!("PCM rate: {}..{}", rate_min, rate_max);
+
+        if sample_rate == 0 {
+            sample_rate = rate_min;
+        }
+
         params.set_channels(chans).unwrap();
         params
             .set_rate(sample_rate, alsa::ValueOr::Nearest)
diff --git a/src/main.rs b/src/main.rs
index 3a673f7..6ecf795 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -137,8 +137,7 @@ fn main() {
 
     let pcm_name = format!("{},{}", device, globals.visense_pcm);
     // Set up PCM to buffer in V/ISENSE
-    let pcm: alsa::pcm::PCM =
-        helpers::open_pcm(&pcm_name, globals.channels.try_into().unwrap(), 48000);
+    let pcm: alsa::pcm::PCM = helpers::open_pcm(&pcm_name, globals.channels.try_into().unwrap(), 0);
     let mut buf = Vec::new();
     buf.resize(globals.period * globals.channels, 0i16);