synthio: add manual filter frequency sweeping to standalone test

.. by assigning a new band pass filter to the note every 2 frames
2023-05-29 11:23:45 -05:00 · 2023-05-29 11:23:45 -05:00 · f5388e12af
parent a891e149a6
commit f5388e12af
1 changed files with 15 additions and 0 deletions
--- a/tests/circuitpython-manual/synthio/note/biquad.py
+++ b/tests/circuitpython-manual/synthio/note/biquad.py
@ -51,6 +51,21 @@ def synthesize(synth):
            synth.release_all()
            yield 36

+    for waveform in (sine, None, noise):
+        n = synthio.Note(
+            frequency=555,
+            envelope=envelope,
+            waveform=waveform,
+        )
+        synth.press(n)
+        i = 220
+        while i < 1760:
+            n.filter = synth.band_pass_filter(i)
+            i *= 1.00579
+            yield 1
+        synth.release_all()
+        yield 6
+

 with wave.open("biquad.wav", "w") as f:
    f.setnchannels(1)