NAudio VS tone

Thanks for the suggestion. I have to rewrite most of the audio signal processing code anyway as I am using NAudio currently. Have heard of PiSound before, and will definitely check it out as it is pretty popular. I just need a way to output an array of numbers, representing the processed sound wave, to turn into an analog signal. Writing this from scratch is unnecessarily complicated when these libraries already exist.

https://github.com/naudio/NAudio/blob/master/NAudio.Core/Dsp/BiQuadFilter.cs Simple formulas for all major types of filters

Not tried it but there is also NAudio (https://github.com/naudio/NAudio)

I’ve used NAudio for this. You get Windows support for free, and it’s not too difficult to implement for other platforms. I have gists published for Android and iOS that should get you going.

This might help: NAudio, they have a doc file for working with pitch here

Hello. I'm working on a school assignment where I'm creating an application where the user can play .wav files slowed down to 0.5 speed. I'm using Naudio and Varispeed to accomplish this. There is a varispeed demo that shows how to do it and from what I can tell, I'm doing more or less the exact same in my code as the demo. But the wave file is played in the normal speed anyways. Does anyone have a clue on what I'm doing wrong?

Have you tried using ABP's own metadata tool and then using that to embed the metadata? They use tone. Not sure if it will help you with the m4bs containing mp4 streams - I've never tried dealing with that.

[2]: https://github.com/sandreas/tone#custom-scripted-taggers-experimental

Feedback is highly appreciated.

[1]: https://github.com/sandreas/tone

- LG G5 H850 (optional with Bang & Olufsen Hifi-Plus module) + Audiobookshelf + Substreamer

Let me cite my comment from https://news.ycombinator.com/item?id=32042780:

I use m4b-tool[1], tone[2] and audiobookshelf[3] together with an LG G5 H850 smartphone[8] with Bang & Olufsen Hifi-Plus Module for Audio Only and I am pretty happy with this config. For Music I use Navidrome[5] and Substreamer App[7]. Maybe I'll try out Jellyfin[4] or maybe Plex[6], but I really don't wanna go closed source.

I also thought about writing something self hosted in C# to have ONE solution for audiobooks, podcasts and music and started a small private project, but this will take a while until it is ready to release something...

You may ask: Why an LG G5 H850? Well, its relatively small and cheap (about 50 - 80 bucks used) it has an audio Jack, USB-C, you can change the battery, it can hold up to 2TB microSD storage, has an HiFi Plus module for audio enthusiasts and a descent screen. Besides that it can run lineage os...

Note: I'm the author of the first two projects :-)

[1]: https://github.com/sandreas/m4b-tool

[2]: https://github.com/sandreas/tone

[3]: https://github.com/advplyr/audiobookshelf

[4]: https://jellyfin.org/

[5]: https://www.navidrome.org/

[6]: https://www.plex.tv

[7]: https://substreamerapp.com/

[8]: https://en.wikipedia.org/wiki/LG_G5

> Very neat, I love it, I used to have a tool to do this but it's been ages and is now unmaintained.

Thank you :-) Glad to hear that.

> Just be sure to do input santization, since if someone else uses your code it could go from a very cool project to a backdoor that ends up on the front page for all the wrong reasons :-)

Good point. I think that the "scriptable" part needs special care regarding security issues, as well as the metadata-readers and JSON parsers. I don't want that to bite me in the neck because of a "malicious" file. Maybe it is worth to provide a responsible disclosure email and make a plan for security issues.

See https://github.com/sandreas/tone/issues/12