GSonic Reference – Free Stereo Room Correction Tool (Measurement + FIR Export)

[OCA]

My setup is Audy mic connected to Soundcard, and output is from PC over HDMI to AVR (SR6013), via WDM.
With Gsonic, the output levels are REALLY low, so low that I need to set volume on PC to 100%, and then also on AVR unusually high, like -15db or so, much much higher than I need to set with AcoustiX. Gsonic is also reporting "levels too hot" or something nonsensical, even if I barely hear anything when sending test noise from Gsonic.
(When I do the built-in "test" in Windows sound card control panel (where it sends chimes to speakers) it is normal, loud volume.)

That being said, I would really also have the ability to measure C and Surrounds, or as an alternative the exact settings I would need to use in REW to sweep and then export the impulses so I can convert them in GSonic. (Which in theory might work when I rename measurements and then have Gsonic produce FIR from them?)

Are you using Equalizer APO? It might be lowering the volume in pre-amp settings. Also check Windows volume mixer for hidden mic/output volume settings. A1X uses AVR internal sweeps which are at 75dB and independent of AVR volume, is equal to -30 otherwise)

 

[abdo123]

@OCA

Sorry to hijack this thread, but is there any thread or space online in general where people are discussing A1 Eva AcoustiX?

I just stumbled on to it and I'm curious to what the MIMO option is actually doing. Seems to sound better in my system than regular calibration.

 

[OCA]

GSonic Reference v1.0.23 released!

New feature
Start Delay (0–30 s slider in the measurement panel). When set, GSonic waits the chosen number of seconds before each mic position's sweep so you can leave the room. FR follows FL immediately (no wait between the two speakers at the same position). Set to 0 to disable. Persists across sessions.

Bug fixes
Linux: fixed ImGui "conflicting ID" warning when multiple audio devices share the same name. Thanks to @3ll3d00d for reporting the bug.

 

[OCA]

perhaps the umik 1, being mono, needs to be open with appropriate parameters?

Your issue looks like sampling rate mismatch between devices. You will need to set everything at 48kHz sampling rate.

 

[OCA]

@OCA

Sorry to hijack this thread, but is there any thread or space online in general where people are discussing A1 Eva AcoustiX?

I just stumbled on to it and I'm curious to what the MIMO option is actually doing. Seems to sound better in my system than regular calibration.

There's a FB group here:

A1 Evo support

 

[OCA]

GSonic Reference v1.0.24 released.

Linux only fixes, details in the log - no need to update from v1.0.23 for other platforms.

 

[john61ct]

Based on this, any specific microphone recommended for gsonic?

Sonarworks SoundID Reference mic

Sweetwater $89 and when I called in they took 10min to confirm its calibration file is not just on axis 0° but also 90° and 30°

Requires a full 48V phantom power, goes up to 130dB max SPL.

Sonarworks SoundID Reference Measurement Microphone

Measurement Condenser Omnidirectional Microphone for Sonarworks SoundID Reference Software

www.sweetwater.com

others are fine, cheap is fine but must be individually calibrated

ASR Acourate users

So bass management is the function category for all that. With "phase / delay issues" mostly a part of that as opposed to "Custom designing speakers from separately driven drivers" ? aka "bi- or tri-amping" which I expressed not a current goal for me. So, add speaker / room compensation EQ...

www.audiosciencereview.com

 

[Nutul]

GSonic Reference v1.0.23 released!

New feature
(...) FR follows FL immediately (no wait between the two speakers at the same position).

Just my 2c.
I think it would be a godd idea to just wait for a couple of seconds between the two sweeps, to allow for room decay to fully exhaust.

 

[OCA]

Just my 2c.
I think it would be a godd idea to just wait for a couple of seconds between the two sweeps, to allow for room decay to fully exhaust.

The sweeps start from 1Hz so there's enough time until audible frequencies start playing but noted for a future update, thanks.

 

[Jon L]

its purpose is to preserve the best possible sound quality at the main listening position (MLP).

You had me at hello

 

[kharan]

The app assumes microphone placements are within the “true” stereo listening area, which is typically not very large. It’s not designed to deliver uniform bass across multiple seats; instead, its purpose is to preserve the best possible sound quality at the main listening position (MLP).

Can you clarify how much large is "not very large"? Should the second and the third measuring positions be 10 cm, 30 cm, 50 cm to the left and right of the first measurement?

 

[john61ct]

How much does your head move?

A bit more than that...

 

[_giacomo_]

I think it is important to open the microphone in bit-perfect mode in order not to alter the recorded impulse response. Moreover, the UMIK-1 is a common device used for acoustic measurements — arguably the de facto standard. In this case the device should be opened at the ALSA level, bypassing RtAudio entirely, so as to guarantee a bit-perfect acquisition.

I understand that supporting multiple platforms is a significant burden. I think the safest path for me is to get a Windows installation — something I haven't done in 25 years, but for this @OCA project it is worth it.

 

[kharan]

How much does your head move?

A bit more than that...

My head doesn't move 50 cm left and right of my main listening position. YMMV.

 

[john61ct]

My head doesn't move 50 cm left and right of my main listening position

So then measure with a tighter spread!

The actual number is up to you, we don't need to know what you end up choosing

 

[HMacFidelity]

First attempt at DSP related activities.

Gsonic measurements and filters

meas_20260420_102916 - Google Drive

drive.google.com

.mdat

gsonic 2.mdat

drive.google.com

Thanks to you OCA

 

[cobby]

Just as a heads-up: I ended up building and open-sourcing my own Linux audio playback + DSP control setup because I wanted something easier to install and easier to live with on a small audio PC.

Especially the A/B compare workflow has been super useful for me.

I posted it here:

FXRoute, browser-controlled Linux audio player and DSP control surface for mini PCs

Hi all, I just open-sourced a project called FXRoute: https://github.com/CobbyCode/fxroute I built it for a small Linux audio PC connected to a DAC / stereo setup, with control from phone, tablet, or laptop over the local network. The main goal is to make a local Linux playback box much...

www.audiosciencereview.com

 

[LionIT]

View attachment 525391

It seems like a great job to me. Congrats!
Some questions:
Will there be a VST/AU plugin?
Possibility to export/manage WAV filters generated by MIMO script?
What speaker configurations will it support?
I see 2.0 to 5.1 in this image... does it perform upmixing?
Thanks!

 

[flexy123]

It seems like a great job to me. Congrats!
Some questions:
Will there be a VST/AU plugin?
Possibility to export/manage WAV filters generated by MIMO script?
What speaker configurations will it support?
I see 2.0 to 5.1 in this image... does it perform upmixing?
Thanks!

VST should be on the convolver that is running on the box. Too bad Equalizer APO doesn't support VST3, otherwise I could plug interesting upmixer VSTs right to Equalizer APO, feed the entire thing stereo (Spotify etc..) and then output upmixed 5.1 from PC, preferrably with FIR on each speaker I am still looking for a good convolver...

 

[OCA]

It seems like a great job to me. Congrats!
Some questions:
Will there be a VST/AU plugin?
Possibility to export/manage WAV filters generated by MIMO script?
What speaker configurations will it support?
I see 2.0 to 5.1 in this image... does it perform upmixing?
Thanks!

Great questions, and honestly you’re hitting right at the core of what I’ve been working on.

Plugin (VST/AU): It’s definitely on the road map.
WAV / filter export: Yes
Speaker configurations: What you’re seeing is basic 7.1 LPCM over HDMI to an AVR. Internally, it's as flexible as the number of audio outputs your PC interface has. The limit is either 32 or 256 channels - need to check.
Up mixing: Not at this time.