Pro Audio Design Forum

Very cool. Selling by-the-pound makes sense. I imagine the upfront costs for the molded case will be pretty hefty, even with modern 3D CAD... Have you talked to any contract manufacters yet? Someone told me that as rule-of-thumb, a turn-key contract manufacturer wants 50% of list price for building,...

Well I sent the thread in more than three directions - at least four in my last post. And John did mention the TS1 and maybe doing another test set so...

Next time I'll start a thread called "Ask JR" as a catch-all for my follow up off-topic questions. LOL

I can see using the tuner in recording school curriculum too. Is the extrusion custom? How horrible are the die costs/minimums? What sort of final test jig do you use to test assembled units? Is it some sort of electro-mechanical setup? I agree about the CAD stuff, it's very satisfiying to have it a...

Yep, probably not worth the effort unless you consider adding it to the tuner as an option or bonus. It would make it that much more valuable to add to the engineer's toolkit. I think the producer/engineer crowd would be a good additional market for a drum tuner, especially with the typical micro re...

Ah, that's cool! I had to think it over for a while to 'see' what happens when the signal shifts from AC=0. The extra bit showed up then too. LOL Are you coding in Microchip assembly? As far as Terrasonde, your pricing is about right - maybe a liitle high-ish. It's a good box, but like I said geared...

Dammit, now I'm mulling mirrored pwm signals...man, what's that for? Building synthesizers now? LOL As far as test gear, that basic stuff is covered. More interesting would maybe be something in between that and a full-blown AP rig. Maybe the next step between it and an AP is a high quality sound ca...

Thanks for posting this, John! I only wish I could design something this elegant with so few parts! Altering the attack circuit like that is really wild - I've never seen that done before (and I've stared at a lot of 570 circuits LOL). I want to give some thought to how I could apply some of those t...

This stuff's really interesting and I will definitely experiment with this when I have some time. Thanks John for your thoughts and explanations. Wayne too! Wayne, do you have access to a copy of Attack and Release Time Constants in RMS-Based Compressors and Limiters, by Fred Floru ? I hear it's pre...

Ah, so I was comparing the JR var-cap to the non-linear cap circuit and stumbled upon where I must have gotten that timing cap/ratio idea: http://www.thatcorp.com/datashts/600034-1.pdf The above calculations assume a stand-alone RMS level-detector. When the detector is placed in a feedback compresso...

O.K. Sensei, one last ponderable and I'll stop bugging you about it (probably... LOL):

That all makes sense to me when it's feedforward, but... when the compressor topology is feedback, does it really "see" that timing cap as being the same value as when the detector is feedforward?