melody | : musical_score : High Quality Api Getaway | REST library

I have the following schema:

I am trying to autoplay a sound which would act as an app startup sound. Below is what I am using. Now when I add controls = TRUE, and click on play, the audio file plays fine, but when I set autoplay = TRUE, it doesn't play on its own. How can I fix this?

I suspect there is some way to use an element’s transformation matrix to calculate its coordinates after being transformed, but I don’t know how to do so.

An example diagram explains this best:

I’m afraid I didn’t take the math route into programming. I can sort-of follow the surface-level details of what a transformation matrix is doing, but my understanding is sort of like being able to read music one note at a time, and only very slowly; I don’t really understand the tune at a higher level, so I don’t really understand the sound of a complete musical phrase—let alone the melody.

Similarly, I don’t understand how transformation matrices work. I have tried searching for explanations to grok transformation matrices, but everything I find is loaded with more math jargon I don’t understand. I just know that they work sort of like a function, and that they are incredibly flexible tools, but that’s it.

Of all the methods available to SVGMatrix (supposedly deprecated in favor of DOMMatrix, but Firefox Dev. ed. is still using SVGMatrix), I have no idea whether .inverse() or .multiply() is what I want, and no idea how to coax a simple set of x and y coordinates out of that matrix.

Note:

• I am not interested in translating screen-to-SVG coordinates here.
• I am only concerned with SVG (user-space) coordinates.

I have model which has JSONField.

I try to run this SQL query:

I am making a Java personal project where you can record yourself singing a song, and the program will load a song (from a preselected small selection) that best matches that melody. So far, I have implemented the ability for the user to record an audio file as a WAVE file using the Java Sound API. I have seen that for audio similarity, one can perform correlation between the audio files, and by measuring if there is a high magnitude peak in the correlation graph one can determine if the audio files are similar.

I read the following post in the Signal Processing stack exchange https://dsp.stackexchange.com/questions/736/how-do-i-implement-cross-correlation-to-prove-two-audio-files-are-similar which talks about using the Fast Fourier transform to accomplish convolution (correlation that works for time-delayed audio). I have imported the JTransforms project on Github to use FFT, but I am unsure how to turn the WAVE files into a numerical representation (something like a large array of values) that I can use to perform correlation or convolution. Any advice on how to go about this is much appreciated!

I have a list called transactions_clean, cleaned up from whitespace etc., look like this:

My son and I are trying to implement one of the fun-science.org microbit tutorials - building a "tug of war" game. Essentially, 10 presses on button A moves the sprite closer to that button and the same applies on button B. When you hit the edge of the screen, music plays and a message is scrolled on the screen before the game restarts.

We've got it fully working, but once the game has been won, it doesn't seem to reset properly. It works fine on the simulator, but not on the physical device (a microbit 2).

Once the game is won, the behaviour is erratic. It usually puts the sprite back in the middle, sometimes not, but frequently, one button doesn't work in the next game. Occasionally both stop working. In every situation, a restart fixes things.

Is there something wrong with the code? I've wondered whether the music / message is corrupting something and I need to put a wait in for it to complete. I've re-downloaded the hex file and re-flashed the microbit several times, so I think I've eliminated a corrupt code file.

Javascript version of code shown below, but it was actually built in blockly using the Microsoft MakeCode tool.

I'm am relatively new to HTML, CSS, and JavaScript. I'm building an app that has the diagram of a violin fingerboard. Got it looking good with HTML/CSS. Things are responsive, clickable, events are working well. However, I am having difficulty accessing any particular element that has a dataset of "note." I need the element for a particular styling to occur on the note when my app sends a note variable to a function which will sound the note. This is not in response to a click or hover event - I'm playing a pre-programmed melody.

I've tried something like this: document.querySelector("[data-note ='G']");

(hardcoded) to no avail. Says:

VM3877:1 Uncaught DOMException: Failed to execute 'querySelector' on 'Document': '[dataset.note ='G']' is not a valid selector. (Got this syntax from an older SO article)

Eventually, I'd like to replace the "G" with an interpolation:

document.querySelector(`[data-note ="${note}"]`);

but I'm not sure of the proper syntax for this once I figure out how to query select the attribute. I should add that all the data-note attribute are unique.

Here is my HTML: