articles/2025/Microphone-distortion-on-Thinkpad-X220.html


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<h2>Microphone distortion on Thinkpad X220</h2>
<h3>2025-04-27</h3>
<h4>Trying to fix a bad microphone</h4>
<p>The X220 has a notoriously bad internal microphone. It can be somewhat improved by making the input mono with module-remap-source<p>
<p><b>/etc/modules-load.d/microphone.conf</b></p>
<pre>
# make micro mono
module-remap-source master=alsa_input.pci-0000_00_1b.0.analog-stereo channels=1 master_channel_map=front-left channel_map=mono
</pre>
<p>Replace master= with your device, and master_channel_map= with the device's channel</p>
<p>It's a bit better, although an external usb microphone is the real solution.</p>
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