mixing audio files in node.js - node.js

Is it possible to mix 2 or more audio files(first.mp3, second.mp3) into a seperate file (mixed.mp3) using node.js?
The mixed.mp3 file need be created from the starts of the selected files and not a concatenation of them. any help will be appreciated

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how to store multiple files in one file in python?

How can I store multiple files in one file using python?
I mean my own file format not a zip or a rar.
For e.g I want to create an archive from a folder but with my own file format. ( like 'Files.HR' )
Or just storing files in one file without any dictionary or file format. ( 'Files' No file format )
You may want to use "tar" files. In python, you can use the tarfile module to write files in the file and then later extract them back into real files.
You do not have to name the file *.tar. You can name it something else related to your specific application, such as naming it Files.HR.
Please see this nice tutorial or read the official docs to see how to use tarfile.

Convert ABC notation file to MIDI, and then render MIDI as audio

I have this data which I have found on the net, I am not even sure what this data is, but I'm sure it is some kind of music notes. Can you help me convert it into an audio file?
E|"D"F3 "A7/c+"A2G|"Bm"FGF "A7"E3|"D"F2A d2c|"G"BcB "D"A3|"G"G2B "A7"A2G|\
"D"F2A d2f|
"G"efe "E7"dcB|"A7"ABA GFE|"D"F3 "A7/c+"A2G|"Bm"FGF "A7"E3|"D"F2A d2c|
"G"BcB "D"A3|"G"G2B "A7"A2G|"D"F2E "Bm"D2F|"Em"EFG "A7"F2E|"D"D3 -D2||
A|"D"d3 fed|"A"c2d e2A|"Bm"Bcd c2B|"F#m"A3 A2A|"G"B3 dcB|
"D"A2d f2a|"G"agf "E7"fed|"A7"e3 e2A|"D"d3 fed|"A"c2B A2A|
"Bm"B3 dcB|"F#m"A3 A2F|"G"G3 BAG|"D"F2A d2D|"Em"EFG "A7"F2E|"D"D3 -D2||
EDIT 1:
I have come to know that this is an '.abc' type of file, also online converters are available to convert it into an audio file.
But I really need to write a python code to convert abc files to midi and midi files to abc files.

How do I read all the .wav audio file in one folder using information from an excel sheet in Matlab?

Hi I have a question for Matlab programming, I want to ask if I am using Mac OS and I have placed all my audio files in the same folder as Matlab, how do I read all the .wav audio files? I want to automate the process.
Example:
Firstly, I have an excel sheet with the audio file name and information.
Secondly, I want to extract the audio file names from the excel sheet (first column) and put it into the audioread function in MatLab.
I need to use the following audioread function.
[y,Fs]=audioread('audio1.wav');
I want to read audio1.wav and do some calculations on it. After finishing the calculation, I will proceed to read audio2.wav and do the same calculation for it. Can you teach me how to do this and show me the code for this?
Thank you.
In Matlab you can read xls files with readmatrix. You are maybe best to export your spreadsheet of audio files to a csv file first.
With regard to organising the data, it would be easiest for the spreadsheet to contain the full pathname to the file (i.e. /path/from/root/to/file.wav)
So, say you had a audio_files.csv of file paths like
/path/to/file1.wav, file1data
/path/to/file2.wav, file2data
/path/to/file3.wav, file3data
You could read each file with something like
filename = 'audio_files.csv';
audio_file_list = readmatrix(filename);
for audio_file = audio_file_list(:,1) % so long as the first column is the file paths
[y,Fs]=audioread(audio_file);
% do something to y
end
Of course, the % do something to y will depend entirely on what you want to achieve.

Compare CSV file data using Nodejs

I want to compare the data in two .csv files.Have to compare the updated data between these two .csv file using nodejs.
Is ther any possibilities to do it in Nodejs.
Thanks,I am very newbie to this.
It will be easiest using one of the following modules:
https://www.npmjs.com/package/csv
https://www.npmjs.com/package/tsv
or other that you find in:
https://www.npmjs.com/browse/keyword/csv
https://www.npmjs.com/browse/keyword/tsv
(don't worry if it's CSV or TSV - just make sure that you use the correct delimiter which is comma in your case).

meteorjs (CollectionFS) read the files source

I am using CollectionFS for my meteorjs Application and trying to upload a file and then read the source to do other stuff.
The holw list I want to do is the following:
Upload the file
Read out the source
Depends on the content I will delete or will not delete the file
Step 1 and 3 are no problem - but the second step I don't understand how to do. There are some Callbacks where I can "access" the file (like build a readStream and so on) but I do not understand how to use this to read out the hole source code.
In my case I upload a CSV file and after uploading it I want to analyse the content - but how to solve step 2 with using CollectionFS ?

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