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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This dude claims to teach an online class in sound recording. It looks good, and is better than the 2 grand class I found from Point Blank, price-wise, even tho they have 1-2-1 tutoring.

I'd like to get opinions on whether he is a crook?

I am so aware of scamming that happens from people in Africa (he lives in South Africa)
He has commendable feedback, apparently. and seems like a decent guy.
I don't think it is a scam?

His site is here
I work in IT at server level so I know my way round systems, but I have this really annoying issue:
The audio is really choppy and the mouse pointer constantly looks as if it is active - it also sticks when hovering over icons or if a program is opening
The audio and mouse are ok after a fresh startup
The issue gets worse after the laptop has been on a few days
Obviously there is a process or processes which are affecting the audio / graphics
One other thing - streaming audio or video from this laptop using a small server locally installed gives audio and video which are smooth, so it is a local issue causing this
The laptop is a powerful Dell 680 24 bg RAM and 8 processors
Taskmanager shows the RAM is at 50% and cpu 25%
Can anyone suggest how I can track down what is doing this
I have tried all the obvious tasks - process monitor, process explorer, taskmanager, malwarebytes scan, ccleaner scan, updated graphics driver and Audio, checked mouse settings
It's a nice iMac, with plenty of resources, i7, Mac OS X 10.11

How can we record just the audio portion (both sides) of a Video conversation?

Hello, can anyone recommend an OFFLINE method to play music over an amp?  Should I get an MP3 player and load music to it from an app?

I don't want to stream music because I don't want to use the internet bandwidth.
I have a laptop and windows 10.  I want to know how to rip cd's, then put all the music on a 32gb flashdrive using the windows 10

I'd like to buy Logic Pro X Apple music studio for my song recording.

It is $200
Does that mean I can only download it once after I pay for it in the app-store?
What if my hard drive dies and I need a re-install?
Would I have to repurchase it?
I saw that Bieber, himself, got found on Youtube.

I've been doing music since I was pre-16, band in college, still mess around. I'm 38 doing well enough, got time,  to give it another stab.
You'll never find me squeaking "Baby, baby" alongside a row of prepubescent girls, Im sure. I'm 6'5"
Musicians do this because they have got to, you know, and I can't close the door on my music. I've just got to do this. I don't need to move to Beverly Hills, or be a red-carpet douchebag. I'd just like to get my music out there.
Articles tell me to just get all my music on Youtube (70 songs) and social network the hell out of them. If I can get interest for people liking the songs in film or streaming, I get small revenue. - Though that's not really the goal.
Wont pinterest be a good angle?
Unfortunately, I had a falling out with my college drummer, so can't do great beats anymore.
Might I be able to acquire some talent on Freelancer just to supply me with beat .wav files as I describe, with some additional unusual-instrument chords over them, maybe? I think I can do the rest if I have excellent beats done. Would that be legally complicated?
Any other thoughts?

So,  I've been working on a project to identify potential high frequency 22khz+ on behalf of a new dog in the house.  While chatting about it to a relative we began discussing his situation.  This field is new to me but I have experience in .Net programming.  Here's the situation:

He works in a booth in a paper mill.  The machine creates a repetitive sound ranging from about 600 hz to 1800 hz in a saw tooth pattern over 5 seconds.  I know this as he recorded it and I can look at it in Adobe Audition.  There are some "harmonics" well above this as well but those look minor in comparison.  The problem is that to cut the mind numbing psychosis inducing (that explains a lot about him BTW) noise the booth has to be sound proofed and he has to wear muffs.

 If we could create some type of noise cancelling FFT algorithm that can run on the PC in the booth or some other mini PC or device that could sync with and cancel out this pattern it would be really cool.  I was thinking of one of the small speaker type boxes or larger desk top speakers if that kind of power is needed as output.  From the reading I've been doing it looks possible and I don't think I would need the processing power to overcome ALL noise just the known frequencies.

I'm looking for any thoughts if this is possible on a DIY basis for a .Net programmer or if a device / software package already exists?  I know it is easy as pie for recorded sounds but how to transmit the cancelling sound to make it less …
So I’m sitting here working on a video project which the client has specified must be done in PowerPoint. The script is done and the voice over (VO) artist asks me “what format do you want the audio files in?”. I initially say “MP3” but after checking, I find this Microsoft Office article that recommends .m4a with AAC:

The VO artists says “are you sure? I’ve never been asked for that before” and I start do doubt the logic behind the recommendation.

Does anyone know why Microsoft are making this recommendation? Will there be any “nasties” uncovered if I use MP3? And if they go to the trouble of making a recommendation, why not specify recommended encoding parameters such as sampling and bit rates e.g. 16 bit @ 48kHz?
I use cool edit to edit music and interviews etc.  I have today had a problem when trying to record an interview in Cool Edit where the Wave form stops recording after only a few seconds?? Please can you assist?


I have a HP Elitebook 840 G3 using Windows 7 Professional x64 and I am trying to set up two audio output devices.
The trick is shown here, and I have previously done this successfully on my old laptop that I do no longer have.

But on my HP Elitebook 840 G3 I have no Stereo Mix. It is not in the hidden devices list either.
First I tried updating the audio driver:

But that did not bring forth the Stereo Mix.

So I am stuck. Is there anyone here that knows how to?
Dell Laptop M6800:

This is a very high spec laptop
RAM is 24 GB and 40 % in use
CPU 8% in use
DISK is around 10%
Windows 10 Pro
The problem I have is that the laptop becomes unresponsive after being left on for 2-3 days
The mouse keeps sticking over icons and juttering and the audio and video keeps buzzing and sticking - both on the internet and local sources
If I stream the audio to another device the audio is fine so it looks to be a local issue

I have all the latest drivers, have run malwarebytes and ccleaner, cecked all antivirus programs etc - no improvement
I work in IT so know my way round computers
Any ideas?

Anyone know of a free audio spectrum analyzer for android devices or windows PC's that can 'hear' up to 45 KHz?  All of the ones I googled (so far) top out at 22 KHz.  It's for my dog who apparently hears things that I don't.  I'd like to track down what's bothering her.  Not sure if standard mics on a laptop are filtered for normal human range or not.  I have the Adobe suite of products so I could use Audition if that helps?  Maybe capture a sample and try running it thru Audition but I don't know if that goes up to higher frequencies either.  Maybe a nature sound analysis program?

I have programming knowledge but it seems like quite a project to create a custom sound analyzer...


why cant i move music from a cd plate to a flashdrive even after following your procedures
Good Morning,

I have installed Android x86 on Quanmax MAXDATA-qute 1000, after that, I installed Xibo client and tested RTSP stream. But it did'nt work.

I also tested RTSP stream on Android phone, and it run well.

So, Android x86 platform doesn't support or any reason. If possible, how can I fix it.

We’re trying to move songs off an older (30 pin) ipod nano (square one / 6th gen), model PC696LL, version 1.2PC.  You can't do that through Itunes (we don't have the computer that originally put the songs on the ipod) right? you need a seperate app for that?

I've used ifunbox before on other devices.  But for this nano, on several different windows PCs, Itunes sees it no problem, but ifunbox v3 and v4 I just downloaded in the last few days don’t see it – says no device connected.

Other ipod management apps DO see it but those are trials of apps you ahve to purchase.

I’m trying to find a page on the ifun website that says if this nano is too old?

Anyone know what app would work with this & is worth buying or is there a free product?  Or a way to get ifunbox working?

Any advice would be appreciated!
I have a customer with a special problem. They have very tight security in the wifi network, nothing gets on it without installed certificate. This rules out wifi-connected devices as printers, projectors and items like Miracast.
They would still like to send audio/video to a projector - while maintaining internet connection on the laptop.
I they could live without internet it would be easy as pie to connect a Miracast with an ad-hoc connection. But that is not what they want.
So I have as I can see it at least two choices, but do not know if either will work:
1. Use two different wifi connections at the same time (could be possible with an extra wifi-dongle, but have never tried). That is, the native wifi connected to the internet wifi, the second one as an ad-hoc to a Miracast.
2. Use a different solution all together, but I have found no good alternative.

To make it even more complicated, there will be a lot of different laptops connecting to the projector, and not all of them have HDMI out. And that is also why no software installation is acceptable. It should work with no hardware/software installation, on at least Win 8 and 10. If using a hardware to send a/v to the projector there have to be at least HDMI and VGA(plus sound) inputs, preferably connecting to a wireless HDMI only reciever.
I can not find how to cancel auto-renew and am told to cancel it on my iTunes settings.

Please explain.

I have n iPhone 6 and just got the latest OS.

Hi Experts,

I'm using Xibo Digital Signage for my company announcements. And I want to use local video (rtsp streaming) feature, but I don't know how to config and use this feature. So can you help me and teach me how to use it?

Hello I have an iPort system in my home (based on old 13pin iPhone connector) and a SONOS Connect.
-I plug my iPhone into iPort dock in my wall,  
-2 speaker wires and 2 dual RCA cables from wall go to
-my Stereo Receiver (in)
-from CONNECT out into Receiver (out)

I am not hearing sound. Is there a different type of setup or device I should be using?
Please provide me with a free AVI to DICOM converter so that I can convert a 560 MB 25 minute long AVI file into DICOM format.

This utility needs to be completely free.

So far I have found a couple utilities that will convert a portion of an AVI file or that will leave a message on the converted videos.

I was in a band through college, but now that I am in the real world, I can't waste my time on music.
I doubt it, but is there any way I can sell my many songs to people that can play them?

Sometimes the audio becomes soft and very less loud.
Laptop: HP Elitebook 8470p
OS: Windows 8.1Enterprise
Audio: IDT High Definition Audio
Complete driver installs "SRS Premium Sound Pro"

Checked for updated driver and utility: None available yet.

I suspect a program is causing it. Any suggestions?
A friend would like my assistance in reviving Cubasis music software for him.
It is a digital audio workstation from 1999, intended for windows 98.
He likes a certain feature relating to using a mouse moving over a timeline to trigger percussion/instruments
I know it was intended for an Atari ST computer, but it evolved to PC as well
but can anything be done for him today on a modern windows 7?
He gets the following error message, attached,  once installed and trying to open
We have the entire CD-ROM content

What sender do you recommend?
I have seen so many on Amazon and Ebay.

The distance is under 10m. The signal comes from a projector, output RCA, left and right.
I want to send that audio wireless to an audio amplifier which has Bluetooth receiver.
Most of the senders have a small battery incorporated, but I do not care, it can be also with power adapter. In fact those with battery have a kind of standby mode to avoid battery discharge. That is something that I do not really need.
One important request is this: when the analog signal comes (projector starts playing) I need that Bluetooth audio transmitter to send the signal right away. I do not want to go and press a button somewhere on transmitter. It should be like a self-activating, self-wake up mode, in case enters in standby. This is very important because that Bluetooth transmitter will be placed near the projector somewhere high and I cannot go every time there to activate manual the Bluetooth transmitter. I want to see this feature somewhere mentioned/explained before I buy it.

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.