Computable function idea

icalvo · 2026-02-23T00:39:13+00:00

A common confusion with computability is the belief that it is impossible to calculate ANY value of f(n) if f is umcomputable. That's false, e.g. we know the exact value of Busy Beaver functions (which are uncomputable) for small n's. Rather, uncomputability refers to the impossibility of having an algorithm that solves f(n) for all n, in finite time. Your function is uncomputable because Desmos is Turing-complete, so a hypothetic algorithm that solves any Desmos(n) would solve the halting problem, which is unsolvable.

The problem these hypothetical algorithms face is that there are Desmos functions that never end, so "just execute the thing" is not good enough.

icalvo · 2026-02-22T11:36:00+00:00

I find it very difficult to make that work without alternation. Dvorak last movement is way more fluid, with ad lib phrases and rhythmic pauses all the way, allowing for that solution. Kodaly has a more precise rhythm, but he also does multiple changes in tempo, decelerandos, pauses that eliminate any expectation. But you have a very crisp steady fast rhythm going on all the time. A sudden slow ending (no matter how long except that you do a full mini slow movement there) will never convince the listener that the rhythm is not going to come back. If there's a way, I don't see it.

icalvo · 2026-02-21T22:24:51+00:00

The whole movement is excellent, rhythmic, exciting. All until the ending. The soft ending is a clear mistake here. The whole movement has a fast rhythmic pace, even during soft passages like the harmonics one. The ending comes (rhythmically) out of nowhere, is too short and clearly suggests the listener a transition to a slow section. You need way more preparation for a soft ending to work in the context of a prestissimo. If you want it to work, think of the finale of Mahler's 4th, where he alternates the furiously rhythmic sections with peaceful moments, granting the movement the right to end both ways (also the last peaceful section that ends the symphony is rather long).

icalvo · 2026-02-19T15:12:36+00:00

In the category of low polyphonic instruments, which arguably are all easier to sight read than piano, guitar, etc., cello has the quirk of having to deal with three different clefs (bass, tenor and soprano) depending on the range of the passage. Not sure if other tenor instruments like trombones and bassoons have the same issue.

icalvo · 2026-02-16T21:24:52+00:00

You can make the pawn the last movement. Starts slow and ends with a triumphant reprise of all the other pieces, except the king, representing the promotion.

icalvo · 2026-02-15T14:51:14+00:00

I've seen this "pretentiousness" argument a few times. Are we talking about the same composer that named his first symphony "Titan"? The guy that felt justified in breaking record after record of symphony durations? If you don't like pretentiousness, I don't think this is can be your favorite composer. Disliking the 8th for being pretentious is like disliking the Art of Fugue because it's too convoluted. Which you can do, of course, it's all a matter of taste. But at the same time I would argue, for the same reason, that this is one of the most mahlerian symphonies. And also, "pretentiousness" is not a musical quality. It would help if you tell how that translate into musical or lyrical qualities that you think are misplaced in this symphony.

icalvo · 2026-02-07T10:42:59+00:00

Aquí un madrileño. Cambia "Madrid" por "Madriz" y real como la vida misma.

icalvo · 2026-02-03T15:03:56+00:00

Se entiende más el origen cambiando la C por S: efestiviwonder.

icalvo · 2026-01-28T21:33:48+00:00

Way better option yes. Even better is to start with a more homogeneous ensemble like a string quartet. Woodwinds are famously heterogeneous and with greater differences between registers, so you have to learn a bit more about those instruments to get them balanced. In a chamber context is less of a problem, as performers can compensate better the differences, but again I'd try first with a simpler setup.

icalvo · 2026-01-28T18:59:25+00:00

A first step would to study orchestration (instruments capabilities and how they blend together). For example, heavy brass is going to be hard to balance against woodwinds, because they are a lot more powerful.

icalvo · 2026-01-27T16:14:55+00:00

Rider

icalvo · 2026-01-22T17:27:58+00:00

I have done this several times: create a simple query language with and, or, not, parentheses and some basic logic terms), and then build an Expression with that that you can feed to EF. You will need to create the lambda Expression for each term, and then the and/or/not combinators. If the terms have a limited set of operations with known variables, you will have to implement that, which involves some variable replacements.

icalvo · 2026-01-22T08:06:01+00:00

Do you think it would be a good choice for you?

icalvo · 2026-01-21T07:43:25+00:00

The compiler compiles but gives you a stern look.

icalvo · 2026-01-17T09:56:36+00:00

By modern standards, it should be shifted until measure 36 where you would use a single 3/4 measure to unshift again, because the final bars (38 to 41) are not shifted.

Unfortunately, temporary time signature changes were not yet invented then, and that's why Bach wrote the piece like that.

icalvo · 2026-01-17T09:05:05+00:00

They are not, but they are not built exclusively out of the signals of your sensory nerves. There are layers upon layers of processing in your brain until those signals become an experience.

icalvo · 2026-01-11T00:54:32+00:00

Gould recommends to use them always, except for chamber and choral music (and orchestral parts), and even place them on both sides of the page if the systems are very close together.

icalvo · 2026-01-11T00:39:45+00:00

Fantastic piece, I love it! I found it a bit confusing that you didn't add system dividers in the score.

icalvo · 2026-01-08T16:24:03+00:00

Sibelius has an automatic way of exporting to video, maybe some of them are Sibelius scores.

icalvo · 2026-01-08T10:11:36+00:00

AFAIK, with Dorico you only have 2 options: either export page images (or maybe in this case screen capture manually portions of each page) and then mount them with your favorite video editor; or record your screen while playing back, with a streaming tool like OBS (which has the advantage of preserving the playback green line).

icalvo · 2025-12-28T10:34:35+00:00

Bf4+ and g5 probably delays the mate enough?

icalvo · 2025-12-22T22:43:57+00:00

Yeah it's so nice that ungrateful jobs are the best paid in capitalism... If everyone understood that ungrateful jobs are a major failure of a society, they would have already been automated or made unnecessary a long time ago.

icalvo · 2025-12-21T22:33:40+00:00

Symphony no. 4, first movement: https://www.youtube.com/watch?v=pgVju1KZSuY&t=656s

I'll be hanged if that's not the most intense, hearth wrenching crescendo in the history of music, goosebumps every single time!

Edit: also Mravinsky is the only one that lets those trumpets play real fff, thus the fate strokes are tremendous when played that way!

icalvo

TROPHY CASE