Re: I've made a sound/audio thing

[blake@reproduciblemedia.com]

Very cool, I look forward to checking it out!



September 4, 2022 12:16 PM, "Zelphir Kaltstahl" <zelphirkaltstahl@posteo.de> wrote:

> Hello Guile users!
> 
> Recently I've looked at "how to write a wav file?" and wrote some code to output in RIFF-WAVE fie
> format: https://notabug.org/ZelphirKaltstahl/guile-examples/src/master/sound/riff-wave. It only
> writes a file currently, and does not read in any files yet. Hopefully I will work on it more soon.
> 
> My idea is, that Guile should be kind of perfect for making functions, which output sample values.
> Just combining functions. I want to make more effects like fade-in and fade out, amplify, change of
> sample rate or whatever else is simple to do. Already implemented things like a function to make
> another function "stepped" (is what I call it), so that one only gives an integer and it will give
> the sample of the index that is that integer, considering a previously given step size.
> 
> I imagine, that it should be possible, to build good abstractions over sample values and then give
> helper functions allowing anyone to make their own effects and so on. When reading in files is
> implemented, one could easily write a little Guile code and apply effects to any wav file.
> 
> I know libsndfile exists and perhaps I should be using FFI to interface with it, but I still have
> not gotten around to learning more about how to use FFI and also I made the mistake of looking at
> the implementation of wav file format in the libsndfile library … biiig mistake :D Well, I also
> would probably not have learned as much about wav files and some bytevector and vector stuff, if I
> had used libsndfile. Though more about FFI …
> 
> Will see how far I take it : )
> 
> Best regards,
> Zelphir
> 
> -- repositories: https://notabug.org/ZelphirKaltstahl