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TVOR-Ceasar
(@tvor-ceasar)
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15/09/2019 1:07 am  

So this forum has really rekindled my interest in design of loudspeakers. In the years since I've started (a LONG time ago), I've learned a lot, done a lot, dreamed a lot. 

One of the things I've done is to take the information learned and translate it into BASIC. Yes, that old DOS beast that does weird and wonderful stuff . Everything has been text based so far, and I don't have any plans to incorporate graphics currently, but I would like to do a big redesign of all the small individual programs all into one. A new interface, easier jumps and edits, file IO, and plain .txt output that can be sent to any printer (I never really got into graphics). I also plan to build in more input to check the manufacturer's numbers, since many of the specs are mathematically derived from just a few parameters.

If you've seen some of the previous threads, you can see that the basics of my calcs are pretty much what WinISD puts out, so you can be sure of it's accuracy. 

What I would like from any of the members out there is for a .txt file from the other programs (WinISD, BassBox, etc.) that shows how they store the parameters for the drivers. Just the .txt file and a screenshot showing the order of the information.

I'm pretty sure I'll be the only one who would want to use it, but I thought I'd put it out there for freeware to the Forum. I'm an older user who remembers when there weren't any personal computers and having a calculator was a rare privilege. It's one of my few indulgences.

Thanks to all.

If there's enough interest, I could translate it into Excel. Of course, that'd be after I get the BASIC version complete.

-Charlie


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Kevin Kendrick
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02/10/2019 5:26 pm  

Hi Charlie, not sure if this will help but thought I would offer. Admitedly, I'm a "BassBox" guy, but not convinced it's as good as it gets when it comes to box modeling. Would like to see some comparisons, measured comparisons. If that's something you had in mind, I'd be glad to work with you on this. Bassbox has it's "Pro's", can't imagine a more user friendly program, but one of the "Con's" is it's not freeware. For some of the guys just getting into the hobby, freeware makes it easier to get started and leaves some extra cash in the pockets for other things.

You requested a text file, but BassBox doesn't show an option for exporting driver parameters that way (if it does, I'm not seeing it). There's a database with thousands of saved drivers, along with the ability to add new drivers and manufacturers. The order of hierarchy is Manufacturer first and all driver models belonging to that Manufacturer under that. The basic parameter screen looks like the one I've attached. You'll notice colored dots to the left of some of the parameters, (green, yellow, or red).  If one of the parameters is too far out of the norm, it will cause issues with others. Any time I've used DATs to get the basic driver parameters, everything else usually checks out once it's input into BassBox.  The attachment is of the SB Acoustics 4" ceramic woofer, model SB12CACS25-4.

SB12CACS25 04

 

 


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TVOR-Ceasar
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05/10/2019 7:42 pm  

@kevin-kendrick

Hmm. Well, I'll just go along and see what I can do in this old-school venture. That screen shot should help. At least I have an idea how to approach it from that.

I have no problem sharing my work if it can help someone go into the hobby in an easier way. Yeah, it may need something like DOSBox to run, but that's free too. I do plan to have the results printed / saved to a standard ASCII text file that will have all the important info and maybe a "text graphic" showing a box with the dimensions on it.

WINISD is free too, I might download it to see how it works as well.

-Charlie


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123Toid
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06/10/2019 12:33 am  

@tvor-ceasar

I have had great success with WinISD.  In fact, it is still the only box modeling software I use.  In my experience, if your measurements are good, then you will get a fairly accurate response with winISD.  I have never used BassBox Pro, but I want to try it out sometime to see if it is actually worth the price difference.  I know, I have said for me the Omnimic made the price difference, but for most people it wouldn't be worth it.  I wonder if that would be the same with Bassbox pro...


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Kevin Kendrick
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06/10/2019 1:32 pm  

It seems WinISD is the homerun for box modeling when it comes to freeware, most of the guys I know in the hobby use it. When getting started, I decided to purchase BassBox after seeing all of Part's Express's recommended enclosure suggestions were done using it. Is it any better (or worse) than WinISD, not sure, have never heard anyone directly compare them. Think I'll download WinISD and play around with it some too, might be interesting. Good luck on the new software Charlie, I'll be following along to see how it works out for you. 


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TVOR-Ceasar
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07/10/2019 8:03 pm  

How's this for an old school Splash Screen?

 

Speaker Designer Splash

I'm not sold on the name. It's a placeholder for the moment. I really would like to incorporate DOS and/or BAS into the name, but there are 2 programs that could be really confused with those particular TLAs.

Plus, I know it needs to come down at least one line and I really need to re-aquaint myself with the extended ASCII code, but you should hear the intro. Straight from the example. 😁

-Charlie


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Kevin Kendrick
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08/10/2019 12:05 pm  

@tvor-ceasar

It certainly has the "Old School" look Charlie. 🙂 


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TVOR-Ceasar
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09/10/2019 11:43 pm  

Update - This time a video. Fairly happy with the Splash and now beginning the Driver Input area.

Yes, there's sound.

-Charlie


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TVOR-Ceasar
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12/10/2019 1:08 pm  

Less annoying Splash screen. Same as before, different audio. Sorry about the shaky camera, but it's handheld across a desk.

 

-Charlie


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TVOR-Ceasar
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29/03/2020 12:49 am  

Wrote a small routine that takes the calculated FB and F3 and converts them to tones (within the limitations of QBasic) so you can get an idea of those hallmarks. Here ya go:

LET FB1 = FIX(Y)
LET F31 = FIX(X)
IF Y <= FB1 + .4999 THEN FB2 = FB1 ELSE FB2 = FB1 + 1
IF X <= F31 + .4999 THEN F32 = F31 ELSE F32 = F31 + 1
IF FB2 >= 37 THEN PRINT "PLAYING FB"; FB2
IF FB2 >= 37 THEN SOUND INT(FB2), 40 ELSE PRINT "FB below 37 Hz, cannot play that low"
IF F32 >= 37 THEN PRINT "PLAYING F3"; F32
IF F32 >= 37 THEN SOUND INT(F32), 40 ELSE PRINT "F3 below 37 Hz, cannot play that low"

In this particular case, Y =FB (calculated) and X = F3 (calculated), both of which "can" have several places past the decimal. This routine "rounds" them up or down, then checks to see if they can be played down to the lowest limit of "raw" Qbasic, which is 37 Hz.

It could get annoying if you had to listen to a lot of that, so it'll be optional. I thought it might be nice to have it available.

-Charlie


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123Toid
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30/03/2020 3:02 am  

@tvor-ceasar

For future reference, there is a great program called sharex.  It is a free screen capture software.  It has helped me out a lot.  Awesome job on the program! 


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TVOR-Ceasar
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30/03/2020 11:46 am  

I have CamStudio on  the Laptop or the Tablet, not on this desktop. Must remedy that situation. Not sure if it does audio, but that's easy enough to dub.

I like using the desktop for most of the "putzing around" stuff with full size keyboard and mouse and real speakers. So much better sounding than the tiny little built-ins in the other ones. They make it sound just like the 8-bit it really is.

If that doesn't work out, I'll try Sharex. Thanks!

-Charlie


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TVOR-Ceasar
(@tvor-ceasar)
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30/03/2020 11:50 pm  

 

Here's a test of 2 different drivers, just to show what the snippet will do.

Here's the screen cap because the conversion to MP4 is crappy. The forum doesn't like WMV. Time for some actual software.

Gento 2 PRV 4

 In case you wanted to know, the frequencies are 128, 86, 53 and 40

-Charlie


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