I couldn't find any mentions of what audio codec it uses in an initial search, but I see "HD Audio" and other sources online say it's a Realtek, so this seems to be a standard Intel HD Audio codec. What's lesser-known is that most if not all of them have a built-in EQ function which can be used to accomplish this (and perhaps the original vendor's Windows drivers already do), but it's not well-documented. Linux has some code for that too (search for EQ in here):
https://raw.githubusercontent.com/torvalds/linux/master/soun...
Ho wow, the sample video shows incredible results, I'd love to read more about how to configure it with my own laptop and microphone. Settings ought to be different for each laptop model, right ?
FYI, when attempting to apply this to speakers, the anechoic frequency response is required. If you try to equalize for flat-in-room response, the results are terrible. See this video[1] for loads more information and context.
On an old MBP I have a similar setup with these two tools:
- https://ju-x.com/hostingau.html
- https://existential.audio/blackhole/
Default output for applications is set to BlackHole's virtual sound device which the "Ext-In / Track D" channel can pick up in Hosting AU as an input. An "AUDynamicsProcessor" and "AUGraphicEQ" stage later (both built-in macOS units) it is sent back to the real output device.
Impulse response is sort of overkill here. If you design a filter bank in the first place, you can just implement that filter bank much cheaper than doing even an FFT-based convolution. Convolution is useful when you don't know the underlying filter transfer function.
What kills me is that I'm going to have to learn half of the skills to do this sort of thing just to reverse one PC's stereo channels. (Though in all fairness maybe it only seems complicated because this is my first contact with Suse/Tumbleweed.)
Under windows https://sourceforge.net/projects/equalizerapo/
>Equalizer APO can be used in conjunction with Room EQ Wizard (http://www.roomeqwizard.com/), because it can read its filter text file format.
Can you similarly process the laptop microphone input so it sounds better?
I've been in this endeavor with Surface Book 2. While the results where good, the CPU usage for software DSP killed the entire effort. Microsoft is using intel's DSP accelerator to do this. While linux technically can use intel's audio DSP I never had enough time to dig into it
One can do similar things with JamesDSP on Android. I believe there are ways to do it without root nowadays. Also you'd be able to find flattening eq curves for your headphone on GitHub and other places. I'll find the link if anybody is interested. This fixes artificially bass heavy headphones pretty well.
What a rollercoaster, not having heard of the GPD Pocket 4 before now, I went through:
- cool!
- oh but there's no way this isn't hard and somewhat manual, something to tune
- wait what, end of blog, that's it, just install a package?
- oh no this is the Asahi announcement, so it's Mac only? [follows link to GitHub]
- no! This is separate, it really is just install a package!
- oh, hang on, GPD Pocket 4 is the laptop shown in image, it's for that only
No slight against the author, nothing wrong with that, just a rollercoaster to follow!
Is there any technical reason it couldn't be generic though? Surely environment has almost as much impact as the hardware anyway, wouldn't you ideally have it sample and adjust every so often on a systemd timer or whatever?
What are the exact steps to repeat this on my own laptop?
Surely, I don't use the wav files for their laptop for mine.
Great to see people using GPD Pocket, it is a nifty little laptop, I am impressed with each new version of it. There are few options for very small and portable devices that have a keyboard, and I find it pretty cool.
I wonder what the latency is. FIR needs quite some time in the lower frequencies.
The title really needs to mention Linux, as this is a solved problem in the OSs used by the majority of people. (Including developers [0] before anyone comments that this is HN).
[0] https://www.statista.com/statistics/1482210/os-distribution-...
I'm thorn between GPD P4 and a Macbook Air for a travel laptop. How good is its battery life?
FxSound made a huge difference in changing my GPD Win Max 2's speakers from unusably bad to average.
Any input on how to do similar speaker profiling inside Windows 11?
I wonder if this is part of what System76 does with their computers
Wim Taymans is the man!
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MBV recorded Loveless w/ two tube amps, face to face to mimic Spector's wall of sound. No effect or pedals. When recording BT over DAW, like in Reverb,.wav/REW audio delay files correct external post-installation drivers.
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Huh, I didn't realize pipewire had builtin support for this! I've been using a different piece of software called Easy Effects[1] on my framework laptop.
To equalize my laptop, I ended up buying a umik-1, and using REW to calculate all the filter coefficients (you can import REW's filter export right into Easy Effects). It's a subtle difference at first, but it's much cleaner (I also usually have a compressor and loudness effect enabled, as the framework speakers are pretty quiet).
[1] https://github.com/wwmm/easyeffects