diff --git a/examples/jack_demo_node_api.rs b/examples/jack_demo_node_api.rs
index d487f3b..05c9eae 100644
--- a/examples/jack_demo_node_api.rs
+++ b/examples/jack_demo_node_api.rs
@@ -2,8 +2,6 @@ use hexodsp::*;
 
 use std::sync::Arc;
 use std::sync::Mutex;
-use std::rc::Rc;
-use std::cell::RefCell;
 
 fn main() {
     let (mut node_conf, node_exec) = new_node_engine();
diff --git a/src/dsp/mod.rs b/src/dsp/mod.rs
index 19f9b60..6e42d56 100644
--- a/src/dsp/mod.rs
+++ b/src/dsp/mod.rs
@@ -865,7 +865,7 @@ macro_rules! make_node_info_enum {
             }
         }
 
-        #[allow(non_snake_case)]
+        #[allow(non_snake_case, unused_variables)]
         pub mod round {
             $(pub mod $variant {
                 $(#[inline] pub fn $para(x: f32, coarse: bool) -> f32 { $r_fun!(x, coarse) })*
@@ -1025,6 +1025,9 @@ macro_rules! make_node_info_enum {
                         }
                     }
 
+                    pub fn desc(&self) -> &'static str { self.node_desc }
+                    pub fn help(&self) -> &'static str { self.node_help }
+
                     pub fn out_count(&self) -> usize { self.outputs.len() }
                     pub fn in_count(&self)  -> usize { self.inputs.len() }
                     pub fn at_count(&self)  -> usize { self.atoms.len() }
diff --git a/src/dsp/node_fbwr_fbrd.rs b/src/dsp/node_fbwr_fbrd.rs
index b594431..d104c69 100644
--- a/src/dsp/node_fbwr_fbrd.rs
+++ b/src/dsp/node_fbwr_fbrd.rs
@@ -33,8 +33,8 @@ impl DspNode for FbWr {
     #[inline]
     fn process<T: NodeAudioContext>(
         &mut self, ctx: &mut T, ectx: &mut NodeExecContext,
-        atoms: &[SAtom], _params: &[ProcBuf], inputs: &[ProcBuf],
-        outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
+        _atoms: &[SAtom], _params: &[ProcBuf], inputs: &[ProcBuf],
+        _outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
     {
         use crate::dsp::{inp};
 
@@ -81,7 +81,7 @@ impl DspNode for FbRd {
     #[inline]
     fn process<T: NodeAudioContext>(
         &mut self, ctx: &mut T, ectx: &mut NodeExecContext,
-        atoms: &[SAtom], _params: &[ProcBuf], inputs: &[ProcBuf],
+        _atoms: &[SAtom], _params: &[ProcBuf], inputs: &[ProcBuf],
         outputs: &mut [ProcBuf], ctx_vals: LedPhaseVals)
     {
         use crate::dsp::{out, inp, denorm};
diff --git a/src/dsp/node_sin.rs b/src/dsp/node_sin.rs
index 3441412..6971e7c 100644
--- a/src/dsp/node_sin.rs
+++ b/src/dsp/node_sin.rs
@@ -4,7 +4,7 @@
 
 use crate::nodes::{NodeAudioContext, NodeExecContext};
 use crate::dsp::{
-    NodeId, SAtom, ProcBuf, denorm, denorm_offs,
+    NodeId, SAtom, ProcBuf, denorm_offs,
     out, inp, DspNode, LedPhaseVals
 };
 use crate::dsp::helpers::fast_sin;
diff --git a/src/nodes/node_exec.rs b/src/nodes/node_exec.rs
index 3acbe76..ae69c8f 100644
--- a/src/nodes/node_exec.rs
+++ b/src/nodes/node_exec.rs
@@ -5,7 +5,7 @@
 use super::{
     GraphMessage, QuickMessage, DropMsg, NodeProg,
     UNUSED_MONITOR_IDX, MAX_ALLOCATED_NODES, MAX_SMOOTHERS,
-    MAX_FB_DELAY_SIZE, FB_DELAY_TIME_US,
+    MAX_FB_DELAY_SIZE
 };
 use crate::dsp::{NodeId, Node, MAX_BLOCK_SIZE};
 use crate::util::{Smoother, AtomicFloat};
@@ -117,10 +117,8 @@ impl FeedbackBuffer {
         self.buffer = [0.0; MAX_FB_DELAY_SIZE];
     }
 
-    pub fn set_sample_rate(&mut self, sr: f32) {
+    pub fn set_sample_rate(&mut self, _sr: f32) {
         self.buffer            = [0.0; MAX_FB_DELAY_SIZE];
-        self.write_ptr         = 0;
-        self.sample_count      = 0;
         // The delay sample count maximum is defined by MAX_FB_DELAY_SRATE,
         // after that the feedback delays become shorter than they should be
         // and things won't sound the same at sample rate
@@ -132,7 +130,10 @@ impl FeedbackBuffer {
         //
         // For more elaborate and longer delays an extra delay node should
         // be used before FbWr or after FbRd.
-        let delay_sample_count = (sr as usize * FB_DELAY_TIME_US) / 1000000;
+
+        // let delay_sample_count = (sr as usize * FB_DELAY_TIME_US) / 1000000;
+        self.write_ptr         = 0;
+        self.sample_count      = 0;
         self.read_ptr          = 0;
     }
 
@@ -146,7 +147,7 @@ impl FeedbackBuffer {
     #[inline]
     pub fn read(&mut self) -> f32 {
         if self.sample_count > 0 {
-            self.sample_count - 1;
+            self.sample_count -= 1;
             self.read_ptr = (self.read_ptr + 1) % MAX_FB_DELAY_SIZE;
             let s = self.buffer[self.read_ptr];
             s
diff --git a/tests/node_sampl.rs b/tests/node_sampl.rs
index cadd212..6492a87 100644
--- a/tests/node_sampl.rs
+++ b/tests/node_sampl.rs
@@ -67,10 +67,9 @@ fn check_node_sampl_long_freq() {
     matrix.sync().unwrap();
 
     let sample_p = smpl.inp_param("sample").unwrap();
-    let freq_p   = smpl.inp_param("freq").unwrap();
     matrix.set_param(sample_p, SAtom::audio_unloaded("tests/sample_sin_long.wav"));
 
-    let (out_l, _) = run_no_input(&mut node_exec, 0.05);
+    run_no_input(&mut node_exec, 0.05);
 
     let fft = run_and_get_fft4096(&mut node_exec, 800, 100.0);
     assert_eq!(fft[0], (441, 1014));
@@ -94,7 +93,6 @@ fn check_node_sampl_detune() {
     matrix.sync().unwrap();
 
     let sample_p = smpl.inp_param("sample").unwrap();
-    let freq_p   = smpl.inp_param("freq").unwrap();
     let det_p    = smpl.inp_param("det").unwrap();
     matrix.set_param(sample_p, SAtom::audio_unloaded("tests/sample_sin.wav"));