Pro Audio Design Forum

Back when I was seriously designing dynamics processing circuits a homemade tool that I found useful was a variable tone burst circuit. Sorry if I've shared this before, the drawing was done in 2007 and I designed this back in the 70s/80s. The bottom section generates adjustable on time and off time...

Getting a little esoteric is there any risk of making compression too clean (i.e. having no sound signature)? Back in the 80s when I was tweaking companding NR my goal was to be as transparent as possible. Modern compression customers may have preconceived notions about what compression "should...

Lower distortion should always be good.

Does it impact the waveform distortion caused by fast release on pure low frequency tones?

While it is unclear that this mechanism is an audible problem with real world complex waveforms.

JR

yup... the "boing" is the odd overload artifact I was referring to.

JR

Springs have odd overload characteristics, I'm not sure how much pre-emphasis they would tolerate.

Companding NR has difficulty with the spring reverb tail altering the expansion decode accuracy.

JR

Thread from the past. I'll add to the dataset that 7.6V is the end-of-life voltage for a Zircon water leak detector. It reached end of life around 12:30 AM this morning and began beeping. I have about eight in the house - two in the kitchen. This one was behind a snap-on kick panel underneath the s...

It's 20 uH 22 Ohm min or 25K max and yes its 1.6 kHz but as I point out the Q is nada at both extremes. my bad, I don't do much work with inductors, [brain fart] I used the relationship for caps in series. It introduces a nice HF gain rolloff. Joe Neil in Waynes mic pre used them IIRC at max gain t...

I don't recall adding those inductors myself or why there are two of them. Perhaps one at each transistor emitter. Surely to reduce RF gain and rectification susceptibility. (I had a junior engineer doing the detail work). The R is never 0 Ohms but 22 ohms minimum/25k max, the L is 5 uH (two 10uH in...

Interesting but is side chain signal rectification the significant audible concern in side chains? In dynamics processing there are multiple moving parts. Too fast release can cause visible distortion on LF content, too slow attack can allow overshoot, etc. There are multiple strategies to mitigate ...

I looked into this concept for reducing ripple in low distortion sine wave oscillator AGC ( a long time ago). A SVF topology for the sine wave oscillator provides the quadrature sine waves. I recall trading some notes with Brad (RIP) so this concept has been kicking around for some time. IIRC he sha...