or Connect
AVS › AVS Forum › Audio › DIY Speakers and Subs › SMS-1 v2.1.3 firmware update
New Posts  All Forums:Forum Nav:

SMS-1 v2.1.3 firmware update

post #1 of 24
Thread Starter 
Hey guys,

I just wanted to give an update to the firmware issue with the SMS-1.

Good news from Velodyne.

I had emailed Velodyne customer support inquiring about the update over the past couple of months. As a result, they have released the updated software to me. I have installed but not yet tested it. But, based on the attached documentation it definitely resolves the distortion and (most of the) rolloff issues.

I would suspect that it will be released publicy VERY soon, possibly even later this evening/tomorrow.

I just wanted to let those that owned the SMS know that the end of that controversy is at its end.
post #2 of 24
DIY to the rescue! lol ..........
post #3 of 24
Thats excellent... Im curious if they have completely removed the filter, or if they made it adjustable.. any idea in the documentation there buddy...?

Thanks for the heads up on this info...


Warp out
post #4 of 24
Thread Starter 
Hey, it looks like things are pretty flat down to the lower depths. There still is a very slight rolloff way low, but an irrelevant hardware limitation....

Turns out the rumors about distortion in the DD series was just that rumors.
post #5 of 24
Thread Starter 
Quote:
Originally Posted by thylantyr View Post

DIY to the rescue! lol ..........

post #6 of 24
This is AWESOME !!!! Curt already contacted me to send it out to me, after posting in Official Velodyne thread. The measurements look promising, the only thing left for me, is getting something to individually phase my subs upon completion...

Warp out !!!!

Quote:



Subwoofer Management System (SMS-1) Release 2.1.3

Release Notes

This document discusses the latest release of Velodyne's Subwoofer Management System (SMS) firmware - release 2.1.3. This firmware addresses two issues related to the low frequency management of the SMS. First, it allows the subsonic filter to be set low enough that the only remaining rolloff in the low frequency is restricted only by the hardware, and secondly, corrects some distortion that previous versions of the firmware introduced to the audio spectrum.



Figure 1: SMS-1 Frequency Response

Please refer to Figure one. This graph shows actual output from the SMS-1 with the subsonic filter set to 5 Hz. The various curves shown reflect the subsonic filter as set to 6, 12, 18, 24, and 30 dB/octave -- the steeper the slope, the higher the subsonic slope setting. As you can see, the actual point at which the curves converge is 5 Hz, and at 5 Hz, the audio frequency is down about 5 dB. The typical 3 dB down point is about 8 Hz. This point is a limitation in the hardware and the low frequency response of the SMS cannot be extended any further without changing components in the hardware. In release 2.1.3 the subsonic filter can be set as low as 1 Hz., but any setting below 5 Hz. has negligible effect on the frequency response.

Note that the low-pass crossover in this example is set to the default of 80 Hz and 24 dB/octave.

Some users of the SMS measured the low frequency performance and discovered that the SMS was adding some distortion to the lowest frequencies. Most users did not notice this added distortion due to the low frequencies affected. The distortion was inadvertently introduced as the frequency processing software, which was based on Digital Drive subwoofers, was rewritten for the SMS. The 2.1.3 firmware corrects this problem.

There was some confusion that this distortion was also present in the DD series. This is not and was never true - the distortion was introduced in the SMS only, and has now been remedied.

If you have any questions on this information, please contact Velodyne customer service at techhelp@velodyne.com.


LL
post #7 of 24
Thread Starter 
Yes, it is certainly a large improvement. There is still a rolloff, but it is one of the few products where gain can be applied below 20 Hz.

I think I am still going to migrate to something else, but the below 20 gain is definitely a plus with the SMS.
post #8 of 24
Thats if it all measures out properly... I have to get the cable to update...
post #9 of 24
Thread Starter 
I am not sure if anyone else has gotten a chance to install the the new version.

I did and I am getting a much improved response, flat down to 15Hz. Actually, the response seems to be slightly flatter above that as well. So, I am a happy camper. Other than the lack of delay/phase adjustment for two subs the update is welcome improvement of the SMS.

I was going to migrate over the DEQ, but it seems that won't be necessary. In fact, with the lack of adjustment below 20Hz on the DEQ it would be a step backwards for me.
post #10 of 24
Thanks for posting your thoughts... if you decide to play with it again, maybe you could take a screen shot...

I haven't had the opportunity to fire up the firmware update, didn't get the cable... today I will and possibly check it out tonight... but Im in the same camp as you... I'll need to figure out individual phasing for the DIY subs...

My room is really smooth with both of my SVS subs, but phasing deffinately made a difference with my setup. Is there any adjustability of a highpass/subsonic filter there...?

Manual stated : Subsonic filter Subsonic filter offers adjustable frequency
(15 Hz to 35 Hz) and slope.

Just wondering if they changed that adjustment...
post #11 of 24
Thread Starter 
Quote:
Originally Posted by Warpdrv View Post


Manual stated : Subsonic filter Subsonic filter offers adjustable frequency
(15 Hz to 35 Hz) and slope.

Just wondering if they changed that adjustment...

Yes, the subsonic filter is adjustable down to 1 Hz now. However, below 5 it is really worthless due to the rolloff below 5 Hz. The new F3 point is around 7-8 Hz now, so that is very good performance. I don't know why anyone would need less than 10.

I will also try to get a screenshot or two later today...
post #12 of 24
Quote:
Originally Posted by jpmst3 View Post

I am not sure if anyone else has gotten a chance to install the the new version.

I did and I am getting a much improved response, flat down to 15Hz. Actually, the response seems to be slightly flatter above that as well. So, I am a happy camper. Other than the lack of delay/phase adjustment for two subs the update is welcome improvement of the SMS.

I was going to migrate over the DEQ, but it seems that won't be necessary. In fact, with the lack of adjustment below 20Hz on the DEQ it would be a step backwards for me.

hey Joe, do you have before and after pics of your update?

i've already installed mine, but apparently my subwoofer was NEVER affected by the early rolloff. it's time to move that sub to the PC
post #13 of 24
Thread Starter 
Quote:
Originally Posted by ribbit View Post

hey Joe, do you have before and after pics of your update?

i've already installed mine, but apparently my subwoofer was NEVER affected by the early rolloff. it's time to move that sub to the PC

Man, that was stupid of me. I forgot to get some screen shots when I added the second sub using the old firmware.

So, no I don't, bummer. Sorry.
post #14 of 24
Quote:
Originally Posted by jpmst3 View Post

Man, that was stupid of me. I forgot to get some screen shots when I added the second sub using the old firmware.

So, no I don't, bummer. Sorry.


What the hell dude... what do we pay you for here...

Go get your gear back out and get on it...

Quote:
Originally Posted by jpmst3 View Post

Yes, the subsonic filter is adjustable down to 1 Hz now. However, below 5 it is really worthless due to the rolloff below 5 Hz. The new F3 point is around 7-8 Hz now, so that is very good performance. I don't know why anyone would need less than 10.

I will also try to get a screenshot or two later today...


Thats great... one more of my problems I was concerned about...
Im glad that its adjustable, and the rolloff with a 10hz setting would be spectacular, for driver protection's sake anyways... It modeled really nice like that anyways...
post #15 of 24
Alright, sounds like the Big V came through or atleast hopefully they did. And perfect timing, sounds like project IB may move forward for me
post #16 of 24
Well I did the upgrade last night... results look very good....

My on screen FR showed a positive change, and opened up the lower end...
I put the SVS subs temporarily in 16hz mode, rolling off gradually down toward 12hz, the measurement was drastically different... After I set the subsonic freq. lower I wasn't showing any roll off just below 20 hz like before, and changing the slope measured far better as well...

Now I got smooth output down to 16hz, instead of it dropping like a rock at 20hz. My huge room (8200^3 open concept) and my listening habits prevent me from plugging ports and setting them to 16hz, as the strain is noticeable from the two subs... They just aren't powerful enough for that large of a room... Hence my need to upgrade my subs... I am taxing these SVS subs (Plus/2 & Plus) beyond their limits in that regard.

I look forward to the results from my DIY subs (dual 320L TC2K's) in that room... I should have tons more headroom that I am restricted by now. But at least I can feel comfortable about keeping the SMS-1 with the fix that Velodyne has provided makes it worth keeping. If not for this system, then for the bedroom. I'll have to see how it fares with the new subs, but most of my EQ-ing is done above 20 hz, so Im not locked into using this unit for sub 20 hz eq. A DEQ would probably work just fine for me...

Thats my Report....

Warp Out
post #17 of 24
Thread Starter 
Quote:
Originally Posted by Warpdrv View Post

Well I did the upgrade last night... results look very good....

Thats my Report....

That's good news Warp. Yes, you are in need of an upgrade.

I think you will like the dual TC setup. It should be a very noticeable step up.

Did you start your build yet?
post #18 of 24
Yes.... I have been cutting and gluing up cherry boards to make my panels.
Its going to take me a while... But the end result sure will be worth it...
When I make some real progress I will post up some pics...
post #19 of 24
Thread Starter 
Quote:
Originally Posted by Warpdrv View Post

Yes.... I have been cutting and gluing up cherry boards to make my panels.
Its going to take me a while... But the end result sure will be worth it...
When I make some real progress I will post up some pics...

Kewl, looking forward to seeing it all come together. As soon as that is done you will want to build something else. Welcome to the hell we call DIY.
post #20 of 24
I finally updated My SMS-1. It took about 10sec. Does that sound correct?
post #21 of 24
Thread Starter 
Quote:
Originally Posted by vitod View Post

I finally updated My SMS-1. It took about 10sec. Does that sound correct?

Yep, something along those lines.
post #22 of 24
Ok, quick question. I don't have a computer at my house with a serial port so I took my SMS-1 over to my parents to upload the software. Do I need a t.v. to do this or only to hook the SMS-1 up via the rs232 9 pin serial cable and just open the software? Let me know, I'm hoping to get my infinite baffle subwoofer system up this weekend and definately need this piece to be flatter down to the nether regions of bass!!!
post #23 of 24
Thread Starter 
No, you do not need a TV, just a computer with serial port and cable.
post #24 of 24
Quote:
Originally Posted by jpmst3 View Post

No, you do not need a TV, just a computer with serial port and cable.

Cool, that's what I was hoping.
New Posts  All Forums:Forum Nav:
  Return Home
  Back to Forum: DIY Speakers and Subs
AVS › AVS Forum › Audio › DIY Speakers and Subs › SMS-1 v2.1.3 firmware update