Initialize all oscillators with different phases and adjust the corresponding tests accordingly.

src/dsp/mod.rs

@@ -963,6 +963,23 @@ macro_rules! make_node_info_enum {
                 }
             }
 
+            /// Consistently initialize the phase for oscillators.
+            /// This does some fixed phase offset for the first 3
+            /// instances, which is usually relied on by the automated
+            /// tests.
+            #[inline]
+            pub fn init_phase(&self) -> f32 {
+                // The first 3 instances get a fixed predefined phase to
+                // not mess up the automated tests so easily.
+                match self.instance() {
+                    0 => 0.0,
+                    1 => 0.05,
+                    2 => 0.1,
+                    // 0.25 just to protect against sine cancellation
+                    _ => crate::dsp::helpers::rand_01() * 0.25
+                }
+            }
+
             /// This maps the atom index of the node to the absolute
             /// ParamId in the GUI (and in the [crate::matrix::Matrix]).
             /// The Atom/Param duality is a bit weird because they share

src/dsp/node_bosc.rs

@@ -4,7 +4,7 @@
 
 use crate::nodes::{NodeAudioContext, NodeExecContext};
 use crate::dsp::{NodeId, SAtom, ProcBuf, DspNode, LedPhaseVals, NodeContext};
-use crate::dsp::helpers::{rand_01, PolyBlepOscillator};
+use crate::dsp::helpers::PolyBlepOscillator;
 
 #[macro_export]
 macro_rules! fa_bosc_wtype { ($formatter: expr, $v: expr, $denorm_v: expr) => { {
@@ -28,13 +28,7 @@ pub struct BOsc {
 
 impl BOsc {
     pub fn new(nid: &NodeId) -> Self {
-        let init_phase =
-            if nid.instance() > 0 {
-                // 0.5 just to protect against sine cancellation
-                rand_01() * 0.5
-            } else {
-                0.0
-            };
+        let init_phase = nid.init_phase();
 
         Self {
             osc: PolyBlepOscillator::new(init_phase),

src/dsp/node_sin.rs

@@ -16,15 +16,20 @@ pub struct Sin {
     srate: f32,
     /// Oscillator phase
     phase: f32,
+    /// Initial phase offset
+    init_phase: f32,
 }
 
 const TWOPI : f32 = 2.0 * std::f32::consts::PI;
 
 impl Sin {
-    pub fn new(_nid: &NodeId) -> Self {
+    pub fn new(nid: &NodeId) -> Self {
+        let init_phase = nid.init_phase();
+
         Self {
             srate: 44100.0,
-            phase: 0.0,
+            phase: init_phase,
+            init_phase,
         }
     }
     pub const freq : &'static str =
@@ -70,7 +75,7 @@ impl DspNode for Sin {
     }
 
     fn reset(&mut self) {
-        self.phase = 0.0;
+        self.phase = self.init_phase;
     }
 
     #[inline]

tests/basics.rs

@@ -45,8 +45,8 @@ fn check_matrix_sine() {
     let sin_led_val = matrix.led_value_for(&sin);
     let out_led_val = matrix.led_value_for(&out);
 
-    assert_float_eq!(sin_led_val, -0.057622954);
-    assert_float_eq!(out_led_val, -0.057622954);
+    assert_float_eq!(sin_led_val, 0.54018);
+    assert_float_eq!(out_led_val, 0.54018);
 }
 
 #[test]
@@ -94,7 +94,7 @@ fn check_sine_pitch_change() {
     let (node_conf, mut node_exec) = new_node_engine();
     let mut matrix = Matrix::new(node_conf, 3, 3);
 
-    let sin = NodeId::Sin(2);
+    let sin = NodeId::Sin(0);
     let out = NodeId::Out(0);
     matrix.place(0, 0, Cell::empty(sin)
                        .out(None, sin.out("sig"), None));
@@ -255,7 +255,7 @@ fn check_matrix_monitor() {
     }
 
     let rms_mimax = calc_rms_mimax_each_ms(&out_l[..], 50.0);
-    assert_float_eq!(rms_mimax[0].0, 0.5013241);
+    assert_float_eq!(rms_mimax[0].0, 0.49901);
 
     // let ta = std::time::Instant::now();
 
@@ -1082,10 +1082,10 @@ fn check_matrix_node_feedback() {
             // The frequency will be established a bit later because
             // the parameter setting of 880 Hz will be smoothed:
             0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0, 0.0,
-            0.6889244, 0.9872897, 0.40561166, -0.5643036, -0.99751425,
-            -0.42060927, 0.6112674, 0.979101, 0.21974884, -0.81355125,
-            -0.83687085, 0.23462467, 0.9970811, 0.35165882, -0.8186541,
-            -0.7396998, 0.5222105, 0.9234876, -0.2683919, -0.983062 ]);
+            0.8791775, 0.8898413, 0.10330327, -0.79178804, -0.92698133,
+            -0.11967586, 0.8259115, 0.86836, -0.09246742, -0.9534301,
+            -0.62676203, 0.5235326, 0.9718173, 0.04517236, -0.9560416,
+            -0.49554884, 0.7601789, 0.75973713, -0.5529301, -0.8783003 ]);
 
     // Let the frequency settle...
     run_for_ms(&mut node_exec, 80.0);

tests/modamt.rs

@@ -42,7 +42,7 @@ fn check_param_mod_amt_with_input() {
         sin.inp_param("freq").unwrap(), Some(0.2)).unwrap();
 
     let rms = run_and_get_first_rms_mimax(&mut node_exec, 50.0);
-    assert_rmsmima!(rms, (0.4992, -1.0, 1.0));
+    assert_rmsmima!(rms, (0.48997, -1.0, 1.0));
 }
 
 #[test]

tests/node_delay.rs

@@ -83,7 +83,7 @@ fn check_node_delay_time_mod() {
     let (node_conf, mut node_exec) = new_node_engine();
     let mut matrix = Matrix::new(node_conf, 4, 4);
 
-    let sin  = NodeId::Sin(0);
+    let sin  = NodeId::Sin(1);
     let dly  = NodeId::Delay(0);
     let out  = NodeId::Out(0);
     matrix.place(1, 1, Cell::empty(sin)
@@ -106,7 +106,7 @@ fn check_node_delay_time_mod() {
     assert_eq!(fft[0], (431,  614));
     assert_eq!(fft[1], (441, 1012));
 
-    let sin2 = NodeId::Sin(1);
+    let sin2 = NodeId::Sin(0);
     matrix.place(0, 3, Cell::empty(sin2)
                        .out(sin2.out("sig"), None, None));
 
@@ -122,15 +122,15 @@ fn check_node_delay_time_mod() {
     let fft = run_and_get_fft4096_now(&mut node_exec, 110);
     // Expect a sine sweep over a
     // range of low frequencies:
-    assert_eq!(fft[0],  (108, 111));
-    assert_eq!(fft[5],  (312, 110));
-    assert_eq!(fft[10], (700, 110));
+    assert_eq!(fft[0],  (86,  112));
+    assert_eq!(fft[5],  (237, 112));
+    assert_eq!(fft[10], (517, 111));
 
     // Sweep upwards:
     run_for_ms(&mut node_exec, 300.0);
     let fft = run_and_get_fft4096_now(&mut node_exec, 122);
     assert_eq!(fft[0], (2509, 123));
-    assert_eq!(fft[8], (2821, 123));
+    assert_eq!(fft[7], (2821, 123));
 
     // Sweep at mostly highest point:
     run_for_ms(&mut node_exec, 700.0);