[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More


Digital Audio

Digital audio is technology that can be used to record, store, generate, manipulate, and reproduce sound using audio signals encoded in digital form. Following significant advances in technology, digital rapidly replaced analog audio technology in most areas. Digital audio systems may include compression, storage, processing and transmission components. It is important to distinguish between the audio coding format, the codec performing the encoding and decoding of the raw audio data, and the container file. Common file formats include .wav, .aiff, .au, .m4a, .mp3, .wma, .ra and .raw.

Share tech news, updates, or what's on your mind.

Sign up to Post

How many people can access podcasts on iTunes and Google Play?

I have a podcast coming up hosted on podbean and distributed through iTunes and Google Play.

How many people could potentially access it?

OWASP: Forgery and Phishing
LVL 12
OWASP: Forgery and Phishing

Learn the techniques to avoid forgery and phishing attacks and the types of attacks an application or network may face.

Got a lecture on MP3.  About an hour long.

Want to cut bits of it into a loop.

Looking for super simple drag & drop audio cutting and splicing.

Audacity seems too complicated.  Need something simpler.  Only requirement is to select blocks of audio and splice them together.  No need for processing or enhancing.

What looks like an easy piece of software to do this?
I am looking for a good music system for my room. I was thinking of what things it should have.. the only thing that comes to my mind are woofers.
Please suggest what other things should one look for when buying a good music system.
I saw one cool product sony amazon
Any suggestions for a good music system and any pros and cons of the above ?
Also i couldnt find out what is the year of manufacturing or model for the above speakers... as that should help in getting the latest one.
Customer asks ...

. Do you by any chance know any digital dictation software that My customer can use from his iPhone  which he will then send to me to transcribe using a foot pedal? Thanks in advance.

I don need software that will turn voice to text

The person is a legal secretary and wants to keep the work not have some software do her out if a job

I am stucked in a project, where I have to convert some audio:
The Audio is PCM 16bit big endian 16Khz stereo & Ulaw 8bit 8000hz. Have to be able to go both ways.
Do you have any recommended Libs or even better software examples that will help me doing it :)

I get the audio in the PCM format as Callback data.
static int stream_GSMdata_2_ulaw(int16 id, char* data, uint32 size)
And after the conversion to Ulaw I need to send the RTP packets in 60 ms chunks (480bytes) via UDP:

Any help is appreciated :)
I would like to recognize sounds within an audio stream.  For instance, a doorbell.
Basically it would be the equivalent to using OpenCV to identify a face within a video stream.
So I am looking for the equivalent of an OpenCV library for audio (rather than images/video).  Or perhaps some cloud-based solution -- although I have not see anything on AWS or Azure.
While converting file from DSS to WAV it says

due to missing file regarding writing access authorization cannot be performed
I installed a new aftermarket stereo in my 01 Tahoe. Everything worked but when I turned the truck ignition to on from accessories... I lost all sound. I pulled it out, opened my door to reset everything and plugged the stereo back in. Started the truck and the same thing happened. I can only get the sound back on by turning off the truck, open door for reset, unplugging stereo, plugging stereo back in and turning truck key to accessories. I tried the deck in my buddy’s 01 Tahoe nod it worked fine. I tried putting his deck in my truck and the same thing happened. I put my stock one back in and it works fine. I’m completely stumped by this?! Help?!?
Assume we have 5,000 audio files of a particular person lecture and assume that that person got died years ago.

Now how to translate the audio files to text.

1. Assume need to upload a audio and correct the transcription based on the pronounciation and fix the transcription errors
2. Repeat the process for couple of files to achieve 100% accuracy
3. Convert the remaining audio files to text

Which application - open source or commercial which has this capability and can achieve more than 90 or 100% of accuracy.

Please kindly suggest with opinions and comments.
Is there a tool/program that I can feed it an audio file and it will create an audio snippet of words mentioned by a voice with searchable metadata?
The goal is to create those types of gags where you have a collection of words mentioned by someone, and then you just create something silly with this.
What is this even called?  Sorry, I'm not an audio guy. Any tools for this? Should I attempt to make one in C#?
Fundamentals of JavaScript
LVL 12
Fundamentals of JavaScript

Learn the fundamentals of the popular programming language JavaScript so that you can explore the realm of web development.

I am responsible for recording training sessions and I need a way to obtain an improved recording of both the presenter as well as participants questions.

I believe the best option is to find a unit that includes:
- 1 lavalier microphone - wireless (for presenter)
- 1 desk microphone - wireless for participant
- 1 microphone mixer/receiver (two channels is all that I require) - must have an output jack with proper impedance to feed into a MacBook Pro audio recording the two channels.

Another option: bluetooth mics with Mac OS software audio mixing.

I don't have much of a budget so ideally, I am looking for a unit that is under $350.

- Most of the models that I have looked at are either more than $350 or are packaged with the wrong types of microphones (i.e. handheld mics or 2 lavalier mics).

Thank you for your advice. :)
I don't know anything yet about reading/writing/manipulating mp3 and mp4 files, but I'm trying to learn.  I need to write a program that reads in mp3 and mp4 files, silences some of the audio portions, and rewrites out the final file.

For an mp3 file, I can use ffmpeg to convert it to a wav file and process and write it back out as an mp3.  I don't think a wav has any messy internals.

For mp4, what with variable bit rates and metadata and such, I don't know how to approach it.  I need to read the mp4 file, modify the audio portion only while staying in sync with the video, and write out the mp4 file again.

My preferred langauge is Python if at all possible, but I'll use C# if I have to, and Java as a last resort.

How can I do this?

I was wondering if they is a media player that support multi instances which I can open each instance with a different settings.
What I am trying to do is to open for example VLC player over and over but each time with a different audio playback device - but it  always opens it with the last saved settings...Tried some more players and they work the same

Is there a player that support this? or is there a parameter to define maybe via command line to open each instance with a different audio setting?


I have a question regarding multiple audio steaming form a single PC.

We have Digital Signage set up which is working with Monitor Anywhere software. Till now we have displayed only static material on 20 monitors which are connected to 2 workstations – one per each floor.
And now our marking tem a would like us to start displaying promotional videos which require sound. Monitor Anywhere support are recommending us to download and buy Virtual Audio Cable  via their site:
But according to them, It will only steam a single audio channel on all 20 screens. But…we need it to steam multiple audio channels over multiple screens – each screen has its own playlist…

Can VAC do that? Is that possible? Is there a different solution for that?

We use a Sony Handycam camcorder to record amateur sports team matches.

We have been using the software that has come with this camcorder called PlayMemories Home to merge these videos together.

This was done on a Windows 10 PC.

The problem is that we have experienced a lot of problems trying to merge videos together using the PlayMemories Home software.

This software does not seem to work with merging videos if the formats of videos are different.

What would you recommend as a better product than the Sony PlayMemories Home software for merging videos.

Hello Experts!!

I am in the need of creating an automatic process that automatically extracts the audio of an 60 minute long MP4 video stored in a folder, converts it to AAC format and then stores it in blocks of 5 minutes.

I wonder if there is an already-existing tool that I could implement to automate this process?

Thanks a lot.
what is the best audio editing software
I have an audio file that has multiple people speaking on it.
I want to reduce the sound of one/2 persons and enhance  the voice of other person. it looks there is some hiss sound and some kind of noise. I also want to remove it.

in short I could say.. I a looking for a software that has the capability to split multiple sounds edit/enhance them individually and then save it.  

is that possible???
I have tried to convert my mix cds to mp3 without any breaks between the crossfaded tracks.  Each time I try it there is a slight pause where the tracks blends in.  This is very disturbing since I created the mix cds to have a continuous flow of uninterupted music.  Is there any way for me to create a mix mp3 file?
I am actually trying to implement text-to-speech conversion in Salesforce by hitting a third-party api.

When i send the request through Postman, i get back the proper response in .wav format. However, I'm not being able to handle this reponse programatically in salesforce end, as I am not able to store the response in any audio object.

Any assistance would be greatly appreciated.

Thanks in advance.
Bootstrap 4: Exploring New Features
LVL 12
Bootstrap 4: Exploring New Features

Learn how to use and navigate the new features included in Bootstrap 4, the most popular HTML, CSS, and JavaScript framework for developing responsive, mobile-first websites.

please contact me there seems to be an equation for tuning it looks like if pitch shifting is done right using the equation even in equal temperament it will be fine
I have finally managed to get my Cool Edit pro up and working on Windows 10. I am downloading directly from a recording desk via a USB interface. All the settings are the same as on my other computer and the device setting box on the program is recognising the USB device. But nothing is being recorded. Any ideas?
I use Lenovo laptop windows 10, I downloaded Itunes to this laptop, the problem is Itunes music that is transfered to the usb won't play in a usb player please help, thank you
hi, Whatsapp archives audio attachments as .opus files. I have saved them to a dropbox. Surely there is a way to play them on a browser without going through a complicated series of conversion steps. I need this to work for non-techies who can click on a link but that's as far as I expect the user involvement to go. I can generate the links if there is a site that will stream the opus files.


Hi, Appreciate it very much if anyone can help.

I want to burn a few songs to a CD for a friend who is in a hospital.  But tried window media player of microsoft , Express burn of NCH Software and a few other burning software, have not been successful.  

Express burn's error message is sense data 03 73 03, don't remember what window media player's error message is.  

I am not sure what is wrong.  I used a disc which is Sony CD-R 700MB.  

Is there anyone having any idea of what is wrong?  Very frustrated at the moment.  Thanks a lot.
I just realized I have set up 2 different Itunes accounts under 2 different email addresses I have. I am trying to add music to a 2nd generation ipod shuffle but it seems it will only sync with one library or the other, wiping out all music under my 2nd account. How do I merge the two libraries?

Digital Audio

Digital audio is technology that can be used to record, store, generate, manipulate, and reproduce sound using audio signals encoded in digital form. Following significant advances in technology, digital rapidly replaced analog audio technology in most areas. Digital audio systems may include compression, storage, processing and transmission components. It is important to distinguish between the audio coding format, the codec performing the encoding and decoding of the raw audio data, and the container file. Common file formats include .wav, .aiff, .au, .m4a, .mp3, .wma, .ra and .raw.