sound guy Xmas idea: APx515 2-Channel Audio Analyzer

This would be a dream for the test bench.  Simple, robust effective analysis tools!   I would be happy with an old system one… but this would be on the shelf in a heartbeat. 

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The APx515 is a high performance audio analyzer optimized for production test. APx515 has a typical THD+N of –106 dB, a one million point FFT with 24-bit resolution, and 192K digital I/O. It is a best-in-class instrument for its combination of speed, performance, automation, and ease-of-use.

APx515 is a significant product because it delivers the performance and reliability of Audio Precision at a production-level price.

APx is the fastest audio analyzer in the world, returning 21 audio measurements in as fast as 1.2 seconds. It is also the easiest to use, with one-click measurements, custom reporting and sophisticated automation without any programming. A full API and LabVIEW driver is also provided.

This speed and ease-of-use means test will never be a bottleneck, and production line managers can achieve reliable, consistent results compared to the current low-cost alternatives like a distortion analyzer.

For companies outsourcing their production, requiring APx515 on the production line gives tighter control over production, ensuring manufacturers are meeting their contractual requirements.

Herman Miller Chair repair

My Old Herman Miller wheels were really ruining my floor.  This is something you don’t really think about until it’s too late…
I ordered hardwood floor safe wheels for my chair.  I really recommend them for any surface… the soft rubber really keeps your floor looking new.

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While I had the chair upside down I thought I’d share a mod I do to them.  If you’ve spent a lot of time in these chairs you’ll know the KLANG the legs make… to keep that klang down to a minimum I Supper 77  in some scrap acoustic foam to the legs.  2014-07-31 22.18.32


schadow switch mounting information

In the 70’s and into the 90’s WBS used a Schadow switch in almost every product they built. Different buttons required different offsets so “GOLDEN RULES” of design were made up so each engineer was on the same page. I found two of those pages the other day and was fascinated. These drawings are both done by hand and are admirable.

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The making of Wilma – Part 1

Quickly Uploaded some pictures of the fabrication of Wilma

Here is the start of wiring up the channel buckets