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<p>I am experimenting with audio production under Linux Mint 20.3
(based on Ubuntu 20.04).
I managed to install a low latency kernel, then I have installed
JACK, and Qsynth, following the steps described in <a
href="http://www.tedfelix.com/linux/linux-midi.html"
rel="nofollow noreferrer">this tutorial:<br>
</a></p>
<p><a href="http://www.tedfelix.com/linux/linux-midi.html"
rel="nofollow noreferrer">http://www.tedfelix.com/linux/linux-midi.html<br>
<br>
</a>Everything seems to work fine if I use Qsynth and
pulseaudio: I use the vmpk simple virtual keyboard, and I have
good output sound.</p>
<p>I have also tested JACK, as suggested in the tutorial using</p>
<blockquote>
<p>$ jack-play test.wav</p>
</blockquote>
<p>and I hear the right clean output.</p>
<p>However, when I tell Qsynth to use JACK, I have a lot of noise.
When I hit a key I have "white noise" for few milliseconds
instead of the key sound, and only when it fades I have a little
bit of the note that I was supposed to play.</p>
<p>I have the same "white noise" problem is I use Rose Garden.</p>
<p>I have tried to change the sample rate and the frames/period
settings, and also the Timeout, in JACK, but the problem stays
the same.</p>
<p><br>
</p>
<p>Thank you in advance for any help you can give.</p>
<p><br>
</p>
<p>Best,</p>
<p><br>
</p>
<p>Fabio<br>
</p>
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