Examples of low level control (synthesis) of audio ? - speakers, HDMI audio

[solidstate1991]

On Thursday, 22 August 2024 at 16:56:05 UTC, Stephen Tashiro 
wrote:
> Are there good explanations or examples of code for low level 
> control of audio in Dlang?
>
> I assume that all high level audio synthesis programs (music, 
> speech synthesis, etc.) rely on some common method of outputing 
> sound.  I also assume the output to analog speakers must be 
> different code than output over HDMI.  Is that correct?
>
> I visualize the final output as data that stores a waveform as 
> a sequence of values that represent amplitudes.  Is that low 
> level of representation necessary? - or do modern speakers and 
> audio devices have built-in programs that accept more concise 
> formats?

https://code.dlang.org/packages/iota

It's a bit janky and preliminary library ATM, but you can get an 
audio stream for both Linux and Windows. Only caveat is you need 
to have the audio thread in a `@nogc` thread, which is pretty 
much expected with real-time applications. It has a few 
testcases, but also my game engine uses it for its software 
synths.

Besides of audio, it also can do windowing, input, OpenGL 
initialization, etc.