diff --git a/rust-whisper.d/src/main.rs b/rust-whisper.d/src/main.rs
index b02b52c..05c0d5a 100644
--- a/rust-whisper.d/src/main.rs
+++ b/rust-whisper.d/src/main.rs
@@ -3,13 +3,13 @@ use whisper_rs::{WhisperContext, FullParams, SamplingStrategy};
 fn main() {
    let ctx = WhisperContext::new(
       &std::env::var("MODEL").unwrap_or(String::from("../models/ggml-tiny.en.bin"))
-   ).expect("failed to load model");
+   ).expect("failed to load $MODEL");
    let mut state = ctx.create_state().expect("failed to create state");
 
    // create a params object
    let mut params = FullParams::new(SamplingStrategy::Greedy { best_of: 0 });
    params.set_n_threads(
-      std::env::var("P").unwrap_or(String::from("1")).parse::<i32>().expect("$P must be a number")
+      std::env::var("P").unwrap_or(String::from("8")).parse::<i32>().expect("$P must be a number")
    );
    params.set_translate(false);
    params.set_detect_language(false);
@@ -21,7 +21,7 @@ fn main() {
 
    let (header, data) = wav::read(&mut std::fs::File::open(
       &std::env::var("WAV").unwrap_or(String::from("../git.d/samples/jfk.wav"))
-   ).expect("failed to open .wav")).expect("failed to decode .wav");
+   ).expect("failed to open $WAV")).expect("failed to decode $WAV");
    assert!(header.channel_count == 1);
    assert!(header.sampling_rate == 16000);
    let data16 = data.as_sixteen().expect("wav is not 32bit floats");