<p>Unlike the Fourier transform, the <a href="http://en.wikipedia.org/wiki/Constant_Q_transform">constant-Q transform</a> uses a logarithmically spaced frequency axis.</p>
<p>To plot a constant-Q spectrogram, will use <a href="http://bmcfee.github.io/librosa/librosa.html#librosa.core.cqt"><code>librosa.cqt</code></a>:</p>
<p>To plot a constant-Q spectrogram, will use <a href="http://bmcfee.github.io/librosa/generated/librosa.core.cqt.html#librosa.core.cqt"><code>librosa.cqt</code></a>:</p>