No, just technical discussions you were interested in. Besides the machine tool chatter, it actually is interesting to see what level and type of test equipment folks use.
But more importantly name calling and such has stopped till now, you choline deficient flerpleberp! 😉 !!!!
I'm enjoying the test equipment porn and tool time, but which one of you is Al and which Tim?
You're welcome! Sometimes a diversion is better than a head-on collision.
I would be interested in hearing what software people are currently happy with for acoustic analysis. Here's why: I am trying to set up consistent and relatively affordable acoustical testing for my studio clients, but so far it is like herding blind cats. I have been using TEF since the release of the System 10 in the early 1980's, and these days use the TEF USB made by Goldline.
Anyone who has used a variety of software as well as TEF knows the TEF interface is something only an engineer could love and it confounds those who do not know what they are looking for not to mention it is kind of expensive. People love the newer cheap software like Fuzzmeasure or Room EQ Wizard, which have much prettier graphical output, but will give you output even when you don't understand what you are doing, and this is the problem.
A specific instance: I have a customer who insists on running Fuzzmeasure at full frequency resolution which is less than 2 Hz and with both speakers operational (you can see this one coming) and says there is a problem with his speakers because when he moves the mic a few cm deep nulls come and go. Correcting this measurement technique error was relatively easy...
When I was learning TEF with Don Davis at SynAudCon he insisted the optimum resolution to analyze rooms (not speakers, crossovers or other specific device) was 1/3 octave, which is also considered to be the average human's critical bandwidth. I have never had anyone point out glaring eq flaws in rooms I have designed this way.
Especially to Ed, what tools are you using and what BW resolution do you sweep rooms? (not arenas, I am assuming this is a different puzzle altogether.)
Back to tech talk anyone?
Howie
I graduated from HS in 1975 with a 1st class commercial license and a job at a local Altec/Swollensack/Hell & Bowell/Sony Commercial Video dealer as a repair technician. You would be amazed now many UMatic machines we fixed with porn videos stuck in them...
Howie
I now find the extremely cheap measuring components from China to be very interesting (engineering wise) and useful. I now have a couple of component identifiers that really work well (enough). Sure they are flimsy and somewhat limited, but they sure help these old eyes for ID, and pin location. I need them almost every day.
Hi Daniel
Periodically verifying a Vmeter using a SW signal generator and a soundcard, would be a solution with very good repeatability and quite precise for my needs.
But there is a circular problem here.
A SW signal generator-say REW- asks for an RMS Voltmeter for to calibrate it’s output.
In our days, is a DDS function signal generator costing $40-50 a good home AC reference source (LP filtered) ?
George
Attachments
Well hhoyt, it is probably porn that made the VCR's demand exceptionally strong at the beginning. Remember, that in the 70's, we used to film porno, and show it in theaters mostly. Then it was possible to have porno in the privacy of your home. A great improvement.
You are absolutely right, John...but the odd thing was, we fixed exclusively institutional video equipment, so it was corporate and school VCRs with the porn stuck in them...I guess the corporate boardrooms are not so boring, or teacher's lounge was used for more than...lounging...
Cheers!
Howie
Howie,
Smaart is pretty much the industry standard for what we do. Everything from 100 seat churches to things a bit larger. Several version and last I looked free trial versions.
As to porn videos, no one wanted to publish a best seller home video list at first as all the top tittles were porn. The Star Trek movie was the first non porn video to top the list. After that the list would be Sci-Fi and porn. Kind of interesting who the early adopters were.
Of course when the internet was young porn accounted for as much as 30% of the traffic.
When doing a humorous college welcome guidebook, one of the bits was the ECI. The Expected Cost of Intercourse was .05 (chance of pregnancy per time) times the % of students not using birth control (.15) plus the birth control failure rate times the % of completed pregnancy births times the cost of raising a kid plus the cost of college times the likely hood (.74). At that time about $2,000.00 per intercourse. So apparently solo porn was far more cost effective.
Smaart is pretty much the industry standard for what we do. Everything from 100 seat churches to things a bit larger. Several version and last I looked free trial versions.
As to porn videos, no one wanted to publish a best seller home video list at first as all the top tittles were porn. The Star Trek movie was the first non porn video to top the list. After that the list would be Sci-Fi and porn. Kind of interesting who the early adopters were.
Of course when the internet was young porn accounted for as much as 30% of the traffic.
When doing a humorous college welcome guidebook, one of the bits was the ECI. The Expected Cost of Intercourse was .05 (chance of pregnancy per time) times the % of students not using birth control (.15) plus the birth control failure rate times the % of completed pregnancy births times the cost of raising a kid plus the cost of college times the likely hood (.74). At that time about $2,000.00 per intercourse. So apparently solo porn was far more cost effective.
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If you're talking about the LCR-T4 Mega328, yes, it's my absolute favorite too.
And yes, the guy who designed it is a mad genius! Video here.
Another of my favorites is this:
It came with the AD584KH and a battery, I paid $10 when it was on sale at Banggood, the chip alone costs $34.89 at Digikey! I don't know how they do it, but it's great to check the accuracy of all the meters I have laying around. DC only, of course.
It came with the AD584KH and a battery, I paid $10 when it was on sale at Banggood, the chip alone costs $34.89 at Digikey! I don't know how they do it, but it's great to check the accuracy of all the meters I have laying around. DC only, of course.
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Of all wonderful music we are given in this world, the St Matthew Passion is the most wonderful IMO. I am grateful that I, only an ordinary person among all other human beings, has the opportunity to enjoy this every Easter.
In this covid-19-times this music perhaps gets another dimension, and it is fantastic to be able to sit at home and still be a participant in this marvellous concert!
Hans
In this covid-19-times this music perhaps gets another dimension, and it is fantastic to be able to sit at home and still be a participant in this marvellous concert!
Hans
Music
Happy Easter with your choice of music
May you listen with your choice of electronics
(at least part of it diy)
I will listen both to live and recorded today
🙂
dennis h
Happy Easter with your choice of music
May you listen with your choice of electronics
(at least part of it diy)
I will listen both to live and recorded today
🙂
dennis h
I know you guys in Switzerland live pretty well, but having a 10k couch (I think that's the one I think it is) in the background, much less her piano, disqualifies it as a student dorm. 😉
Happy Easter and Passover (still going), all. (And whatever other spring religious events that I'm ignorantly missing!)
George -- Yeah, I'm aware of the chicken and egg problem. 🙂 I was thinking one could use a DC multimeter to get a decent lookup on the sound card (code linearity).
Only if the soundcard output DC. Soundcard accuracy is an issue. The virtue of the solution in Bill Waslo's Praxis is that the external module provides for full calibration of the soundcard's level and frequency response.
My experiece showing even well trained tech's on acoustic measurements is that the measurement needs to be completely preprogrammed and an exact fit for the task. Acoustics have so many dimensions where you can get bad data screwing with what you are trying to measure. The moment a software package adds the necessary development tools it becomes much more challenging for users. However when they have automatic features those usually only work in the spaces the programmer lives in.