dspig (u/dspig) - Readit News

dspig commented on Are rotary mixers better? djmag.com/features/are-ro... · Posted by u/daledavies

dspig · a year ago

Any headline with a question... Of course it depends on what you want to do and what you are used to.

Technically, regardless of the rest of the product design there are high quality potentiometers available both as linear faders or rotary knobs. I guess dirt is more likely to get into a linear fader and make it scratchy - especially in a club environment.

dspig commented on What Makes Music Sound Good? (2010) [pdf] dmitri.mycpanel.princeton... · Posted by u/lopespm

SeanLuke · 2 years ago

> Most Western instruments produce “harmonic” sounds that, when analyzed as Fourier described, have relatively strong lower overtones f, 2f, 3f, 4f. The overtones of several of these sounds will match when their fundamental frequencies are related by simple whole-number ratios.

I've always had problems with existing consonance theories along these lines, probably out of ignorance. I believe that consonance probably has something to do with partial relationships. But it always has seemed the existing theory regarding consonance and partials is half baked at best.

Harmonic sounds have partials at f, 2f, 3f, 4f, and so on. So let's take C and G, a perfect fifth. Will say f = C. So C's sawtooth has partials of

f 2f 3f 4f 5f 6f ...

G, at a perfect fifth, is 3/2 the frequency of C. So it has partials at

3/2f 3f 9/2f 6f 15/2f 9f 21/2f 12f ...

The only overlaps are 3f, 6f, 9f, 12f. That's pretty thin gruel given how fast these partials drop of in amplitude (for a sawtooth, a partial at xf drops off as 1/x)

Now consider E, a major 3 and also considered highly consonant. This is 5/4. So we have

5/4 5/2 15/4 5 25/4 15/2 35/4 10 ...

That's an overlap of just 5, 10, ... with a super fast dropoff.

Now consider Eb, a minor 3 and also consonant. This is, wait, Eb can't be approximated in rational values at all, um....

And if you just have sine waves, rather than sawtooth or whatnot, they consist of a single partial so there's never any overlap -- you're back to the pythagorean square 1.

dspig · 2 years ago

I think what's going on with consonance is that there is an implied lower pitch that all the partials are harmonics of - that also works when there are just sine waves.

dspig commented on Rheinmetall pilot project for curb stone chargers for EVs rheinmetall.com/en/media/... · Posted by u/giuliomagnifico

eliaspro · 3 years ago

If parking would be left to "the market", no one would do it within city limits. Parking spaces are heavily subsidized.

In Germany, until recently the costs for a residential parking spot were capped at strong 35€/year or so.

The actual "market value" of the equivalent space in cities is often around 4000-6000€/year.

Getting cars out of cities and using the space more efficiently for pedestrians, cyclists and public transport is not only a way to drastically improve safety and quality of life in cities, but also a smart economical choice (and no, building tunnels like Musk dreams of it, isn't the solution to this problem).

dspig · 3 years ago

Especially in Cologne where the underground is already full of modern and ancient stuff!

dspig commented on The Lofi Magic of VHS Audio [video] youtube.com/watch?v=OHoTz... · Posted by u/rhema

Aloha · 3 years ago

There is a whole (almost) lost history about PCM Adaptors for VTR's.

Sony made some for U-Matic (3/4 in), there were some for VHS, and some that were meant to use other broadcast grade formats.

Also, ADAT, which used a SVHS tape and mechanism to store multi-channel audio

dspig · 3 years ago

The Sony PCM-F1 was one of these - and was the first time I got confused between "is this live or is this the playback?" because until then it had been obvious.

dspig commented on An introduction to lockless algorithms (2021) lwn.net/Articles/844224/... · Posted by u/signa11

oriolid · 3 years ago

Citing TFA,

> If you’re less lucky, you’ll have to switch your audio effect to bypass mode, or perhaps fade out, or some similar fallback strategy. It’s probably not ideal, but in many cases still better than a glitch.

dspig · 3 years ago

or if the lock is on some smaller part you might be able to still render the audio but e.g. not update the settings that changed yet, and try again next time.

dspig commented on Understanding British Money: What's a Quid? A Shilling? (2020) iheartbritain.com/underst... · Posted by u/lisper

denton-scratch · 3 years ago

A thruppny bit (three-penny piece) was my favourite coin. It was a brassy colour, different from every other coin - not coppery, and not silvery. It was quite heavy - it felt like wealth. It had twelve sides - the only sterling coin that had sides, until the introduction of the 50p bit, with decimalisation.

The other thing I liked about it was that three is such a crazy denomination for a currency token, like a three-dollar bill; three old pennies were heavier and bigger, but the old pennies were ridiculously large and heavy.

I also liked florins and half-crowns. A florin was a two-shilling piece, and a half-crown was two-and-a-half shillings. These were coins that actually contained silver.

A crown was five shillings, but not generally used as currency, it was issued as a memorial, like a medal. At one time I owned a Churchill Crown, issued to commemorate Churchill's death. They were big, heavy coins. That's why a half-crown was two-and-a-half shillings.

dspig · 3 years ago

thruppny bit is also ryhming slang, but in the other direction

dspig commented on Gimp 2.10.32 on Apple Silicon (2022) gimp.org/news/2022/12/02/... · Posted by u/wiihack

aroman · 3 years ago

Why not offer this as a universal binary? Seems like a bunch of extra work to generate two separate DMGs and try to point users to the right one...

Regardless, congrats to the team! Though, I'll note this blog post is from almost 6 weeks ago now.

dspig · 3 years ago

Along with the other answers here, using a newer Xcode and macOS SDK in order to build for M1 can limit compatibility with old macOS (OS X) versions.

dspig commented on Riffusion – Stable Diffusion fine-tuned to generate music riffusion.com/about... · Posted by u/MitPitt

haykmartiros · 3 years ago

We took a look at encoding phase, but it is very chaotic and looks like Gaussian noise. The lack of spatial patterns is very hard for the model to generate. I think there are tons of promising avenues to improve quality though.

dspig · 3 years ago

Phase itself looks random, but what makes the sound blurry is that the phase doesn't line up like it should across frequencies at transients. Maybe something the model could grab hold of better is phase discontinuity (deviation from the expected phase based on the previous slices) or relative phase between peaks, encoded as colour?

But the same thing could be done as a post-processing step, finding points where the spectrum is changing fast and resetting the phases to make a sharper transient.

dspig commented on C++ audio mixing library design lisyarus.github.io/blog/p... · Posted by u/ingve

urban_winter · 3 years ago

I wonder if, in retrospect, the decision to use floats was a good one. The author mentioned issues with the time of each sample for the sine wave, which were float-related. I get that audio effects (compresser, reverb etc) are probably easier using floats but I don't immediately see why it's better to have float as the core data structure and convert to int at the end rather than having int as the core and convert to/from float only when needed.

dspig · 3 years ago

Yes it's a good decision, and 'the standard' for audio in the same way as 32-bit ARGB makes everything easier for graphics. Of course there are some things that are better done with ints or maybe doubles, like keeping track of the time position, but for the sine wave generator it doesn't need to know how long it's been running in total, just the position in the current cycle, so floats are fine for that.

dspig commented on I made a guitar tuner app using Flutter and Rust justune.eu... · Posted by u/zduny

skybrian · 3 years ago

I'm interested in the algorithm for that, but it looks like for PolyTune, they just say "patented 'MonyPoly' algorithm."

So that's out. I wonder what other research has been done into detecting multiple notes at once?

dspig · 3 years ago

Each string has it's fundamental frequency and harmonics. Some of them coincide or are very close in frequency, but some are unique to one string so can be picked out and their frequency measured with a FFT of sufficient resolution and used to indicate the tuning of the string it must be a harmonic of.

(Polytune is more robust than just doing this and does work really well, but if the guitar is really out of tune the method falls apart and you have to use its one-string-at-a-time mode)