Update app.py

app.py

@@ -51,7 +51,7 @@ def create_spectrogram_and_get_info(audio_file):
     if len(audio_data.shape) > 1:
         audio_data = np.mean(audio_data, axis=1)
     plt.specgram(audio_data, Fs=sample_rate / 1, NFFT=4096, sides='onesided',
-                 cmap="jet_r", scale_by_freq=True, scale='dB', mode='magnitude', window=np.hanning(4096))
+                 cmap="gnuplot", scale_by_freq=True, scale='dB', mode='magnitude', window=np.hanning(4096))
     plt.savefig('spectrogram.png', dpi=300)
     audio_info = sf.info(audio_file)
     bit_depth = {'PCM_16': 16, 'FLOAT': 32}.get(audio_info.subtype, 0)