FREE SPLMeter app - now available on GitHub

[Miracle_Nosh]

Hi Philipp - this is amazing work. I've been looking for a solution like this for live sound deployment - and this really could be the ticket for me! Thank you for all your hard work, and for sharing this.

I agree with Icemac - a measurement for LCeq - LAeq (C-A Delta) would be incredibly useful for live sound use. It's an almost essential metric for monitoring bass comfort levels, which is an area where I've been struggling without this.

One quick question that I do have, after downloading and trying the program out. I'm using a Mini-DSP Umik-1 which, now that I've loaded the calibration file, seems to be measuring accurately. But whereas the numbers at the top of the screen are correct (dBA, dBC, etc), the same measurements on the graph are metering far higher. For example, the graph will be been hitting 100dB dBA - but the numbers (which I've tested against a known accurate SPL meter) are only at around 70dBA. Do you have any clues as to why this is?

Anyway - thank you so much for sharing, once again. This is incredible work.

 

[Philipp Paul Klose]

Hi Nosh, thanks for kudos! When you load the cal .txt - What does Calibration value say in the settings? With Umik, you should see ~106dB. You can also read the sensitivity from the txt and enter it yourself. The hover text helps. OR you use a calibrator…

 

[Miracle_Nosh]

Hi Philipp - thanks so much for your response. The calibration value doesn't automatically change after loading the Umik-1 calibration file, but REW reports a Full Scale SPL of 124.25 upon reading the same cal file. My Umik-1 has a factory gain of 18dB, and 106+18=124 - so that makes sense. Inputting 124.25 as the calibration value (though SPLMeter rounds it up to 124.3) gives me A-weighted results that are very close to REW when running pink noise - within 0.3dB - although it ramps up to and down from those numbers much more quickly than REW.

The C-weighted figures are slightly odd, with SPLMeter consistently reporting about 3dB higher at any given volume than REW from the same pink noise source. Do you have any thoughts as to why? I should mention that this is running on Windows 10.

Where I'm more confused is that the graph doesn't seem to match those numbers, showing significantly higher than they actually are - as per the attached image.

I'm so sorry to take up your time with this - I realise that you didn't post this here to troubleshoot!

 

[Philipp Paul Klose]

Hi - very nice! The plotter seems to be off, I have just checked it myself. Will fix in v3.5.

 

[Miracle_Nosh]

Awesome - sounds good! Thanks so much.

 

[Gregm]

Thank you Philipp for developing and sharing. Very cool!

 

[Philipp Paul Klose]

Dear all, thanks for your contributions. I included all your input and made the changes today. A new release is in the making. Prerelease here:

Bump to v3.5.0: unweighted Peak readout, timeline RMS fix, Bass comfo… · ppklose/ppkSPLMeter@d7a47a3

Config files for my GitHub profile. Contribute to ppklose/ppkSPLMeter development by creating an account on GitHub.

github.com

 

[Philipp Paul Klose]

Release here: https://github.com/ppklose/ppkSPLMeter/releases/tag/v3.5.0