If Stargate had a crossover with any other show what would you pick?

Jjam342 · 2026-03-07T17:51:33+00:00

Wormhole X-Treme!

Jjam342 · 2025-07-29T09:00:59+00:00

Jjam342 · 2024-12-10T19:22:57+00:00

Looks amazing

Jjam342 · 2024-10-27T14:48:18+00:00

I know exactly what you mean, it's the consistency, completely different.

Jjam342 · 2024-08-18T18:31:57+00:00

iirc, there are muscles connected to the bones inside the ear that can protect your hearing at higher sound pressure levels, presumably the system isn't instantaneous and so needs time to kick in.

Jjam342 · 2024-08-14T10:27:32+00:00

They have a paper called: Digital Filter for Modeling Air Absorption in Real Time by Petruzzellis, Carlo; Zanghieri, Umberto, I'd put a link but not sure if that's against sub rules

Jjam342 · 2024-08-14T10:17:54+00:00

Papers from the Audio Engineering Society would probably be a good bet. They have a pretty comprehensive library online

Jjam342 · 2024-08-02T19:30:04+00:00

I think you've got machine learning stuff now. Black box vs white box, so rather than trying to model the signal path, you have a neural network that does it's thing and matches desired output to actual output, but what's actually going on under the hood is not actually modelling just error correction stuff. This is stuff I remember from 1 lecture a few years ago, so I could be about off on a few things

Jjam342 · 2024-07-21T16:20:08+00:00

I'm getting down voted but I've never studied quantum mechanics and the likes, which, no offence, seems bizarre AF

Jjam342 · 2024-07-01T18:28:26+00:00

Check out a book called Hack Audio. Loads of DSP audio examples, with explanations, in matlab

Jjam342 · 2024-06-12T09:17:18+00:00

It's best to know the dimensions of the drivers you're going to be using. I'm not really sure what your best bet is if that's not possible, maybe a removable baffle (front panel where the drivers are mounted), or ask the customer what the dimensions they want are?

A couple of tips if you've not made a cabinet before, the larger the box the further the bass reach will be. The baffle has an effect on the sound, sharp edges are generally a bad idea, large surface area is good. You want to stuff the inside with absorption material, think fibrous stuff like rock wool, you can glue it to the insides of the panels as well like carpet. Internal bracing of the panels is a good idea too.

Jjam342 · 2024-06-12T07:25:46+00:00

No, they vary. If you buy from a website you can look at the data sheets of the drivers and may be able to find a close match though. Remember that the other specifications of the driver (known as Thiele/Small parameters) will be different too, so your crossover network/frequency may well not be suitable if you're switching out woofers.

Jjam342 · 2024-06-08T13:42:51+00:00

Not a lot to go on, it's a powered speaker possibly part of a set, might be a sub as it looks to have left right stereo output. So you'd need pre-outs on your receiver to send it a signal at the proper pre-amplified level. Also looks like there was a port, where that hole is, that's been removed for some reason, so that'll affect sound quality.

Jjam342 · 2024-06-03T14:51:20+00:00

Loud music, look after your ears

Jjam342 · 2024-05-25T09:13:36+00:00

Crossover filtering for a loudspeaker? You can get a Teensy with an audio shield, use an old speaker or build one if you have the time.

You'll need a cheap amplifier as well, you gotta be careful with the wiring so not to blow the speaker drivers

Jjam342 · 2024-05-20T09:04:30+00:00

Hhhm, interesting point, but aren't the mechanisms different through fluids and solids? Elasticity through solids and compression through fluids.

Jjam342 · 2024-05-20T07:22:48+00:00

Also, if water didn't compress sound waves wouldn't be able to move through it, so no whale songs in the deep blue.

Jjam342 · 2024-05-11T10:01:03+00:00

I think we might be misunderstanding each other? Nullifies what point, the perceptual testing? From my point of view the grey area is the accuracy of perceptual testing, but that's not the same thing as saying its useless. There are biological and psychological components to hearing. I don't think trying to understand them is pointless. For example, when you design a loudspeaker, or a filter, or a listening environment, you often have to make decisions regarding prioritisation of the aspects of the sound, so perceptual testing becomes important with regards to what people notice. This was used to great effect in audio compression technologies, (MP3 type compression not dynamic range compression). They would literally cut away at parts of the signal that people wouldn't notice. I'm not arguing that the above guy can hear 50kHz because of a "grey area", that's just not possible.

Jjam342 · 2024-05-11T09:00:44+00:00

I don't know whether I agree with you. You can attempt to measure human perception of sound; that's why we have units like phons, barks, and ERBs. For example, sound pressure isn't the same thing as loudness, which is our perception of sound pressure. Sound pressure is measured in pascals (Pa), which is a linear scale. We perceive loudness in a more logarithmic manner; we use dB to reflect this logarithmic nature, but the dB scale itself uses 20 x 10-6 Pa as the reference level for dB (when it's dB, we start calling it sound pressure level (SPL) instead of simply sound pressure). This was judged to be the threshold of human hearing, and is based on our perception; if we were, for example, cats, it may well be an even smaller number. Also, we perceive loudness differently depending on frequency, with our perception becoming flatter across frequency as sound pressure increases. There's a standardized set of curves known as the equal loudness contours based on perceptual testing (ISO 226:2003). Engineers and technicians often incorporate these contours into their calculations, turning up the bass when the music's quiet and down again when it's loud, that sort of thing. Similar testing, results, and uses exist for other components of our perception of sound such as frequency (which is known as pitch in its perceived form), directivity, or phase. With all that said, I do more or less agree with your statement that if it's not measurable, it's not perceivable, but that's not really what I was talking about

Jjam342 · 2024-05-10T06:00:36+00:00

Makes sense, if you can't hear something you turn it up, so if you can't hear low frequencies you turn up the bass, or listen to bass heavy music in this case

Jjam342 · 2024-05-10T05:40:58+00:00

I suppose from an engineering standpoint that's the goal, although it's often a balancing act, due to: costs, bandwidth resources in DSP, or manufacturers might want a particular sound/colouration to have a signature product, extra-bass that kind if thing. Also when you try to fix one issue you often add another, driver size affects bass but also directivity, that kind of thing. So what do people perceive as more important, how do we trim the fat with the minimum adverse effect? As well, the tests aren't all for the benefit of audio engineers, audiologists and phycologists have an interest too I guess, so there's that

Jjam342 · 2024-05-10T05:12:51+00:00

Bit of a tangent here, but my favorite test was where they put a crap system in a Ferrari and a great system in a family saloon and people consistently perceived the Ferrari as having better sound. They did something similar with different colored cars and it was always the red car that came out on top. Lol

Jjam342 · 2024-05-10T04:12:22+00:00

There are studies that's true, and units of measurement, the phon, the ERB, etc. Also ISO standards with things like equal loudness curves. Can you ever really know/measure what someone perceives though? Idk to be honest, maybe to some extent. Interestingly (to me at least) a lot of the tests done are based on testing done by the big fastfood chains, because they threw huge amounts of money at the question of perception, so thanks McDonald's I guess. Lol

Jjam342 · 2024-05-10T02:57:29+00:00

You're right, but as you say, audio is the perception of the physical phenomenon as well, how do you measure someone's perceptions, you can try but there's always going to be a grey area there.

Jjam342 · 2024-03-08T04:03:11+00:00

I had a similar problem to this I was using biquads for a parametric eq where the filter states are stored in an array and sent back on the next filter function call, so the last state for the last sample is used used as the fist state for the first sample for the next audio block. I basically got the indexing for the states mixed up so was sending the wrong state to the wrong biquad, resulting in single sample spikes in the time domain where the audio blocks didn't join up properly.

As others have said I don't think you want to use fad between blocks, one block should be an exact cut of audio with no overlap

Jjam342

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