equalizer | Pulseaudio LADSPA Equalizer | Command Line Interface library

I am a shiny newbie. I am trying to make an app where the user can move the slider and select the values, like in this sound equalizer example or colour picker example. But my app places the slider inputs on top of each other. Can someone help? Codes:

I am working on an audio visualizer for the web that also lets the user "tune" the raw audio signal visualizer to a frequency. This is a feature of many hardware oscilloscopes. Basically, when a user centers on 440Hz and I have a 440Hz sine wave, the wave should stay still on the canvas and not move left or right. My plan was to move the graph to the left according to the frequency (440Hz = 1/440s to the left per second because the wave should repeat every 1/440s), but this does not work as it seems.

I could not find the units used by the Audio Analyzer Node's time domain data. I guess that it's in milliseconds, but I am not certain.

I'm trying to figure out how to remove duplicates based on the url, as the aggregate query can match the same document twice if say "APPL" and "TSLA" are in stocks and included in the same document.

I am trying to make the "animated bars" smaller. I have tried achieving this by editing the values of "height" in the CSS, as well as the starting values in the JS file

is there a code or setting to be changed elsewhere in the JS file for this to be achieved?

This is the Original Working Version:

I need the animation and audio play function to load/play on load. It loads and pauses when clicked. However when the page loads, I would like the animation to load along with the playback of the audio file.

I have tried to use the var playing=true; but it does not seem to affect the autoplay feature.

My pull request keep failing on linters with this Ruby gem error:

I have been shown how to filter a noisy audio track using Audacity. Audacity forum link here

Audacity accepts python script commands however not for the crucial noise reduction function. I have looked for a command line tool to do this process and SoX appears to be suitable.

The 1st step in Audacity is to apply the following: Effect > Filter Curve > Manage > Factory Presets > Telephone Filter

Reading the SoX manual - SoX does not provide a filter curve. SoX does however provide this.

equalizer frequency[k] width[q|o|h|k] gain Apply a two-pole peaking equalisation (EQ) filter. With this filter, the signal-level at and around a selected frequency can be increased or decreased, whilst (unlike band-pass and band-reject filters) that at all other frequencies is unchanged. frequency gives the filter’s central frequency in Hz, width, the band-width, and gain the required gain or attenuation in dB. Beware of Clipping when using a positive gain. In order to produce complex equalisation curves, this effect can be given several times, each with a different central frequency.

Is this the right SoX function to use? How do I use this function to achieve the EQ curve?

I am looking for an ideally open source application for my next DIY smart-home-project, that frontend is web-based and plays the media on the server rather than on the client. The application would ideally be platform independent, for example java based web application, as my server would be either an ARM based or an Intel based SBC with linux as an operating system. Storage can be anything, like FS or DB, does not matter.

My use case: When I open 'http://my.media.local' from my phone's browser and select a media file, for example an audio file to play, then the media file is played on the server rather than on my mobile phone or in the browser of my mobile so that the sound/video/picture comes out from my server's audio/display output rather than from my phone's audio/display output. Obviously it would come with other basic features, like volume control and equalizer et cetera.

Is there anything like this on the market? I have found a few media library but not sure how they work. Any advise would be welcomed.

I am receiving audio via Bluetooth and also playing it live. I have achieved this by AudioTrack class in Android studio. I used the equalizer class in Android but it cuts the frequency of certain bands only. Eg it only cuts 460-1800 hz on the phone that I am testing. But I want to cut 500hz-1500hz as a bandpass filter does. I have been stuck on this problem for quite a few days now.

I know its possible because I have seen it in other apps eg. Stemoscope

At least point me in some direction. I tried to use TarsosDSP but I can't get any good resources on that and when I used it the output was corrupted and I wasn't able to fix it. I can't seem to find any other library. I can share the code if anyone interested.