Digital sound processing tutorial

This is off topic but I’m assuming difficult-to-gather DSP peers will be in this comments section.<p>I have run into the limit of double precision floating point when making high order (20+) IIR filters in MATLAB. My solution in the past has been FIR filters and waiting a long time. I recently experimented with alternative forms of IIR representation. I found that converting from transfer function (B,A) to zero-pole-gain (z,p,k) form, then to second order sections (sos,g) form, then using the MATLAB filter function, the issues with double floating point precision go away in my use cases.<p>Is this a well known trick that I just stumbled upon?

I did develop a proof-of-concept for a client recently which involved some digital sound processing on mobile devices and used this[1] book as a reference to refresh some (advanced) basics again. Can recommend this to anybody who is interested in digital signal processing as I really liked the style and density in this book<p>[1] Discrete-Time Signal Processing: Pearson New International Edition

Shameless self-promotion: I’ve been in a similar journey of learning DSP and I’ve been sharing my findings as well: <a href="https:&#x2F;&#x2F;youtube.com&#x2F;channel&#x2F;UC_R-6HcHW5V9_FlZe30tnGA" rel="nofollow">https:&#x2F;&#x2F;youtube.com&#x2F;channel&#x2F;UC_R-6HcHW5V9_FlZe30tnGA</a>

For any newcomer looking for reference material on this topic, look at <a href="https:&#x2F;&#x2F;ccrma.stanford.edu&#x2F;~jos&#x2F;filters&#x2F;" rel="nofollow">https:&#x2F;&#x2F;ccrma.stanford.edu&#x2F;~jos&#x2F;filters&#x2F;</a> and his other books which are quite thorough.

If you&#x27;re interested in this topic, and want to play. I highly recommend GNU Radio. It lets you build flowcharts that can actually do I&#x2F;O with your soundcard, as well as File I&#x2F;O, etc.

looks like entirely written in a text mode!<p>Epic!

For what it&#x27;s worth, most of these concepts directly map to radio as well.