Heal

Play an adjustable collection of healing tones to the speaker using speaker-test from alsa-utils.

alsa-utils and Linux

I'm targeting this first version to just Linux, noting that alsa-utils from the Open Sound System (OSS) interface is loaded by default on Raspian where I'm testing this on a Raspberry Pi 3.

Installation (assumes that you already have Node.js and npm installed)

git clone https://github.com/OutsourcedGuru/heal.git
cd heal
npm install
DEBUG=heal:* npm start

If your server doesn't have an internal speaker then plug in headphones or a speaker to the headphone jack. The sound is meant to be server-based (rather than client-based) since this was by design.*

Surfing the created website

Depending upon where you are running the server, either:

http://localhost:3000

...or http://device-ip-address:3000

Webpage

The website offers a selection of tones which may be played. Once started, a Stop button is displayed, allowing a new tone to be supplied.

Notes

I could not otherwise find a node module which very simply plays or otherwise synthesizes a tone on the server. Everything I found was both client-side and required a browser window object, neither of which filled my needs here since it's a headless, server-side project.

* Intentionally, I created this so that the sound events would occur on the server since I'm implementing this on a Raspberry Pi 3 device. In theory, the user would initiate the controls on their cellphone, surfing the Pi by its name plus port.

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