<div dir="ltr"><div>Regarding the Pi visualization, the cheap lazy part of me would want to replicate that in software instead of hardware. Get a Pi, hook it up to a 27 inch monitor, and find a Linux based audio player that has visualization modes. And if I really wanted that dot effect, I suppose there would be libraries I could use to put together something that looked like how it looks in the video. That's just a frequency domain graph, right?</div><div><br></div><div>Maybe something like this?<br><a href="https://github.com/dpayne/cli-visualizer">https://github.com/dpayne/cli-visualizer</a></div><div><br></div><div> - Jess<br></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Mon, Jul 8, 2019 at 11:42 PM Matthew Campbell via SGVLUG <<a href="mailto:sgvlug@sgvlug.net">sgvlug@sgvlug.net</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div>I just finished building a couple of new speakers and am now considering their feeding. Any suggestions from the audiophiles in the SCALE/AV group or aficionados of any stripe are appreciated.</div><div><br></div><div>I currently am driving a carver amp from an old cell phone running Android through a small 4-channel mixer:</div><div><a href="https://www.sweetwater.com/store/detail/ProFX4v2--mackie-profx4v2-4-channel-mixer-with-effects" target="_blank">https://www.sweetwater.com/store/detail/ProFX4v2--mackie-profx4v2-4-channel-mixer-with-effects</a></div><div><br></div><div>Adding the 2 new subs requires a bi-amp setup. I was running the sub out of the headphone jack through a low-pass filter for testing, but am looking for a better solution for production. Something like the NHT X2 sounds interesting, do any of you have experience with this?</div><div><a href="https://dk1xgl0d43mu1.cloudfront.net/user_files/nht/downloads/000/003/172/X2_Manual.pdf" target="_blank">https://dk1xgl0d43mu1.cloudfront.net/user_files/nht/downloads/000/003/172/X2_Manual.pdf</a></div><div><br></div><div>I also think there must be a way to do this with a larger mixing board. What other approaches are worth inspecting?</div><div><br></div><div><br></div><div><br></div><div>On a separate project I am thinking of running a video display off the board through a custom Pi input. I played with a LM3915 equivalent back in high school to good effect.</div><div>
<div><a href="https://www.elprocus.com/visualized-audio-level-display-using-lm3915/" target="_blank">https://www.elprocus.com/visualized-audio-level-display-using-lm3915/</a> </div><br></div><div>Here's the kind of project I had in mind. This is a video of a commercial product, anyone build something along these lines recently?<br></div><div><a href="https://youtu.be/PAjNA0UocOs" target="_blank">https://youtu.be/PAjNA0UocOs</a></div><br><div>Matt</div><div><br></div><div><div><div dir="ltr" class="gmail-m_7715795183105986073gmail_signature">---------<br>Matthew Campbell<br>Architect Lead, Office of the CTO<br><br>Kaiser Permanente<br>Green Center 041R08<br>99 S. Oakland<br>Pasadena, CA 91101<br><br>626-564-7228 (office)<br>8-338-7228 (tie-line)<br>626-460-9781 (mobile)<br>---------<br><a href="http://kp.org/thrive" target="_blank">kp.org/thrive</a></div></div></div></div>
</blockquote></div>