Round to integers in plot_input and spectrogram examples

See #21.

Author: mgeier

examples/plot_input.py

@@ -86,7 +86,7 @@ def update_plot(frame):
         device_info = sd.query_devices(args.device, 'input')
         args.samplerate = device_info['default_samplerate']
 
-    length = np.ceil(args.window * args.samplerate / (1000 * args.downsample))
+    length = int(args.window * args.samplerate / (1000 * args.downsample))
     plotdata = np.zeros((length, len(args.channels)))
 
     fig, ax = plt.subplots()

examples/spectrogram.py

@@ -2,6 +2,7 @@
 """Show a text-mode spectrogram using live microphone data."""
 import argparse
 import logging
+import math
 import numpy as np
 import shutil
 
@@ -63,8 +64,8 @@ def int_or_str(text):
     samplerate = sd.query_devices(args.device, 'input')['default_samplerate']
 
     delta_f = (high - low) / (args.columns - 1)
-    fftsize = np.ceil(samplerate / delta_f).astype(int)
-    low_bin = np.floor(low / delta_f)
+    fftsize = math.ceil(samplerate / delta_f)
+    low_bin = math.floor(low / delta_f)
 
     cumulated_status = sd.CallbackFlags()