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.

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Starter acoustic guitar for use with the Chord Buddy, Android smartphone, and sound amplification

I purchased this thing called the Chord Buddy https://www.amazon.com/gp/product/B00OABXOMG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1 and am considering this option for a starter acoustic guitar https://www.amazon.com/Fender-FA-115-Acoustic-Strings-Instructional/dp/B0092V7WJ0/ref=sr_1_4?keywords=guitar&qid=1571024587&sr=8-4.

I don't want to spend a fortune but I would like to give myself some long-term options in case I actually enjoy it.

Is it possible to have this guitar interface with my cell phone in some way?

I want to make sure I am going down a reasonably flexible path before dropping another $150-$200 on a guitar, etc first.

Your thoughts and some guidance here would be greatly appreciated.
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Amazon Web Services
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Amazon Web Services

Are you thinking about creating an Amazon Web Services account for your business? Not sure where to start? In this course you’ll get an overview of the history of AWS and take a tour of their user interface.

We have a reporting tool that can export telco recordings by downloading mp3 or wav files. Everything in the application seems to work correctly except when we try to download a sound file. We get the following error. error message when exporting sound fileThis is only an issue on one of the five system the application is installed on.
thank you
Wayne
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Here's a weird one: Windows 10 has now seemed fit to mess with my audio, to the point that my "L" and "R" sliders have to be changed. This just started about a month ago and I've since reinstalled the Realtek Audio drivers from Dell 3x. (This is a Dell Optiplex Workstation).

If I don't keep the "L" at around 25 and the "R" at around 75. I lose all kinds of channels and levels of audio to the point it gets incredibly distorted. When I turn the levels down to 0 to mute the volume, they seek their level and pair up again and I have to fix it over and over. I've turned off all the Audio Enhancements and this is a new one on me.  These levels don't seem to stand for left and right anymore and I'd love to get my normal audio back.
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hi
i recently recorded a conversation between me and another person using the smart voice recorder android app. although i can hear the speech but there is also extra sounds like of shutting door and small talk sound of people outside the door.  is there any tool to remove the  background noise ?
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Hi, I've used RAD studio Tokyo/Delphi to create a program for Android. I have this program working and looking good on my Amazon Fire. It occurred to me that a nice embellishment for this program would be a click sound for when the user presses a button...feedback. I remember about 35 years ago when Casio came out with calculators that could beep for each keypress. I found this useful and missed it when they stopped including sound a couple of years later.
I started to research this and found that Android prefers .3GP audio files. There don't seem to be any audio files on the fire.
What I am thinking is I would produce four very short audio files and save or convert them to .3GP. They would be tied into buttons as part of an on-click event. I would use a TMediaPlayer. There would be a tick, a tock, and two other similar sounds.
My questions are: Should I use one Media player, or four ? Are there no built-in sounds I can use, or a different way to generate sounds ? Or is this all a bad idea perhaps because it would be too much for the Fire ? Should these files be stereo ? What sampling rate and bit depth ?
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vb.net  linkbutton.  How to allow  a site visitor to click a linkbutton on aspx page and download mp3 file to their machine or device.

problems encountered:
music plays or thread aborted encountered or nothing happens

need help
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This question is a two parter. First of all, using C#, is there a way to check the specific encoding information on a .WAV file? I know I am able to check things like the sampling rate, number of channels, etc. But I want to be able to detect if the .WAV file uses either µ-law (u-law), PCM, or any other formats I'm not aware of.

If the .WAV file turns out to be something other than µ-law, how do I convert the .WAV file into µ-law using C#?
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Have a set of corrupted WAV files.  I have tried everything to recover the data.  VLC, Audacity, hex editor, soundhack, etc.  The binary is all 0s.  The file sizes are large 280mb, 1.5gb, etc.  One file even has corruption in the middle of the clip.  Audio was fine until 20 mins in, and then it went completely silent.  Would love any ideas or input.
Screen-Shot-2019-02-25-at-12.30.29-P.png
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Hello all,

I have this really decent USB wireless digital mic device:
Samson XPD1 Lavalier USB Digital Wireless System https://www.amazon.com/dp/B014803CMK/ref=cm_sw_r_cp_api_i_QzIvCbSJBBCRN

It works great with my computer, but I’d love to adopt this to also work with my DSLR camera.

I figured that I could build an interface to provide 5vdc to the USB based transmitter and extract analog audio with an D/A converter. But I’m currently um... lazy er... too busy at this time. LOL  

Can anyone suggest a ready to purchase adapter that can do this?

Thank you,
Shawn
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Stream radio from UAE
I would like to listen to this radio stream from this website on my Android phone
https://www.radio4fm.com/player/

but its geo locked to UAE only, anyway I can listen to this from Canada for free or any cheap method.

Thanks,
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Python 3 Fundamentals
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Python 3 Fundamentals

This course will teach participants about installing and configuring Python, syntax, importing, statements, types, strings, booleans, files, lists, tuples, comprehensions, functions, and classes.

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

Thanks
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Hi
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:
 SendRTPData(myData);

Any help is appreciated :)
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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.
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While converting file from DSS to WAV it says

due to missing file regarding writing access authorization cannot be performed
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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?!?
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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.
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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#?
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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.

Challenges:
- 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. :)
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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?
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Become a Certified Penetration Testing Engineer
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Become a Certified Penetration Testing Engineer

This CPTE Certified Penetration Testing Engineer course covers everything you need to know about becoming a Certified Penetration Testing Engineer. Career Path: Professional roles include Ethical Hackers, Security Consultants, System Administrators, and Chief Security Officers.

Hello

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?

Thanks
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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.

Thanks,
Robbie
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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.
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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???
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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?
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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.
Abhishek.
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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.