PM_ME_VINTAGE_30S [he/him]

Anarchist, autistic, engineer, and Certified Professional Life-Regretter. I mosty comment bricks of text with footnotes, so don’t be alarmed if you get one.

No, I’m not interested in voting for your candidate.

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  • 92 Comments
Joined 1 year ago
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Cake day: July 9th, 2023

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  • Try to make my community or technical contribution as cool and useful as possible. IMO the utility of Lemmy is really the ability to connect with other people all around the world based on our interests. The money is only important insofar as the devs and admins need money to eat.

    Reddit is a business, one of whose least important goals seems to be maintaining a safe online space for humans to chat. Lemmy isn’t about the money; it’s about the people.

    I have a few ideas for things that might be cool, but none of them are “silver bullets” that will make everyone immediately come over to Lemmy, and frankly they’re not special. IMO we need to slowly, “organically” create communities and technical infrastructure that people want to come to.



  • The result seems to me to be more like Reverb in my perception/use.

    You’re on to something: reverbs often intentionally create resonances. Reverbs can be simulated with a filter (although commercial reverb plugins and hardware typically sprinkle in some non-linear goodness).

    What does the absence and abundance of resonance reify as observably?

    In audio systems, it sounds like you added ringing to the signal. If it’s too much ringing, eventually the ringing will dominate over your signal and you’ll basically get a sine wave at the resonant frequency.

    Below is a response of a filter with a resonance:

    You’d have to show me a diagram or plugin with the control labeled “R” to be sure, but I believe that with respect to the above diagram, R is equivalent to ζ (zeta). However, some plugins use Q = 1/(2ζ) as the parameter for the user to change, in which case the intuition is practically “backwards”.

    When ζ is about 1, the system described by the graph basically doesn’t ring. As ζ goes to 0, the resonant frequency and its neighbors start to get boosted, giving the characteristic “ringing” sound. If ζ = 0 (or practically is close enough), you get an oscillator, i.e. you generate a sine wave with the resonant frequency.

    What does R refer to or what is it a spectrum from->to?

    The spectrum of the filter is actually the curve above, along with its phase curve, which gives you the output of the resonant filter given any input. ζ and Q are different ways of specifying the strength of the resonance.

    Note that I used a filter with just a resonance for simplicity, but any filter can have a resonance, including low-pass filters, in which case ζ is often used as a parameter in the math. You can logically think of a resonant low pass filter as a “non-resonant” low pass in cascade with a resonant peak (order doesn’t matter) at the same frequency you set the low pass to, even though they’re not designed that way.


  • 7y(12e+11) - 85 = 2y +12e

    (7(12e+11)-2)y = 12e + 85

    y = (12e + 85)/(7(12e+11)-2)

    y = (12e + 85)/(84e+77-2)

    y = (12e + 85)/(84e+75)

    Assuming e := exp(1) ≈ 2.73, my calculator says that y ≈ 0.3878, or a little over a third.

    If e :≠ exp(1), then we need a second equation to even have the possibility of a unique solution. As it stands, e may take on any value except -75/84 = -25/28 ≈ -0.8929 where the denominator goes to zero. To see this, assume that the equality does hold with e := -75/84. Then:

    7y(12e+11) - 85 = 2y +12e

    7y(12(-75/84)+11) - 85 = 2y +12(-75/84)

    2y - 85 = 2y - 75/7

    85 = 75/7

    595 = 75

    We have reached a contradiction. Since the only assumption made was that e := -75/84, it must be impossible.


  • So my answer really comes from waaay back when I was a producer.

    What is the psychological effect of listening to two different pieces of audio simultaneously?

    It depends on the audio content, its message if it has any, and the psychological state of the listener. It’s generally not dangerous to try it out, but most often it will sound like incoherent garbage.

    What if the pieces are the same and start at different times?

    Now that is a more interesting question!

    Up to ~15 milliseconds — You won’t perceive the two pieces as two different pieces. It is equivalent to running through a comb filter, which gives (in my opinion) a weird “woody but also digital” sound. It’s like a flanger effect that “doesn’t move”. Basically, it’ll sound like an “off” version of the original piece. Comb filters are more often “used” by accident because there are two versions of a performance with delay times (for example, when two microphones record the same instrument).

    ~20 to ~50 milliseconds — Starts to sound like multiple performers playing the same piece, or like a “thicker” version of the original piece.

    ~40 to ~120 milliseconds — “Slapback” delay. It’s starting to sound like multiple parts. Also makes parts sound “thicker”, but very distinct to 50s music, blues, and rockabilly.

    ~150 milliseconds to several seconds — Starts to sound like an echo’ed version of the original piece.

    ~More than several seconds — One of two things could happen:

    1. The original piece has a rhythm, and the delay “syncs up” with it. Then, you get a new piece that hopefully sounds cool. If the delayed version is the same volume as the original version, the overall piece will get louder when the delayed version starts.

    2. Any other condition: It sounds (musically) incoherent to the listener, and will basically be perceived by the listener

    All of these delay effects are musically useful, but also serve as the prototypes for other effects. Additionally, digital equalizers are mathematically equivalent to a bunch of delays “stapled together” and rescaled.



  • First off, we don’t masturbate into shoeboxs for years on end, and then allow the semen to accumulate, thus producing disgusting horrific clumps that need radioactive gloves to dispose of.

    Speak for yourself ☢️☢️📥💦 🍆😂

    We don’t do the whole “What’s in the safe?” posts.

    Because Lemmy is open-source, the contents of the safe are available to the public, so we don’t need such posts

    And finally, everybody has already agree’d, I am the ultimate supreme master, and everybody has to give me all their money at all times. So, be prepared to cough it up, newbie.

    Tap to instantly receive all my money

    A picture of an empty wallet with no money

    Oof, tough break there