C++ audio

Where can I learn about how to program audio in C++? I already know many of the the basics of C++, but I really want to get into audio programming.

Topic by 8bit 


Audio Cards

Can anyone tell me how I can made an audio crads like the ones you can purchase in stores. I would like to be able to purchase the circuit board and speker and then record my own messages for my grandchildren books. If you know wher I can purchase the circuit board, speaker and what else is need to record my own voice on the circuit borads. Thanks Mike

Topic by wacky   |  last reply


audio work

Hi, I am working on a project where I need to recess a XLR jack.  Currently, I am looking for a recessed box that can hold one or two XLR jacks.  It seems as though any box I have found so far is rather pricey, and I am working on a fairly low budget.  Does anyone have a place where a small recessed box can be purchased for a good price?  I am hoping under $25.  Your help is greatly appreciated. 

Question by sound91   |  last reply


Car Audio? Answered

First off, this is a question about speakers sound quality loudness and all that stuff, it doesn't really have to do with any math or equations, just experience.  So I want some sub woofers, and after looking around I have determined that there are cheap ones, and very expensive ones.  Now, if I get a fairly affordable 15" (med quality) will it be louder/better than a 12" one that costs $900

Question by jj.inc   |  last reply


Audio chip? Answered

I want to make a device to play a sound when a PIR sensor detects motion, but I don't know about the audio chip. I can't seem to find a chip that allows you to program a sound clip to it, then output it when it is given a signal. The closest I found was a cheap sound recorder module from china, but it contains all the external components (mic, batteries, speaker, switches) and so it acts just as a voice recorder. I need an individual chip that will do something similar. I may use the module as a prototype, but I eventually intend to mass produce the circuit, so that is why I am looking for an alternative. It only needs to hold about 5 seconds worth of audio, medium quality.

Question by andy70707   |  last reply


Audio rythmical

How can I make an equalizer Audio rythmical?????

Topic by adcbluis   |  last reply


Audio - headphones

My daughter runs a Pre-school and uses a small cd stereo setup. The output is a pair of mono jacks (R/L) for speakers. I am looking to build a distribution box for up to 6 headphones. Thinking of one input (from the speaker jacks using a 2 to 1 plug) The headphones are mono 1/4 so those jacks are readily available. I do not know what the output is of the stereo system is but I doubt it is much over 5 watts (if that). Will I need some sort of amplifier? any thoughts on switches/switching jacks if not all are being used. Thanks for listening. guitar 52

Topic by guitar 52   |  last reply


10W audio amp?

Ok, so i want to get this one audio amp to work, but i can't seem to figure out how to wire it! the first picture is a schematic, and i have NO idea what the connections are, 1, 2, and 3 the second is a picture of the amplifier chip

Topic by Sandisk1duo   |  last reply


Simple audio amplifier?

Alrighty, I'm a n00b to this world but I'm really into it. I just bought a simple amplifier kit and put it together. It is a stereo amp but I am only getting output to one speaker. The only problem I can think of is how i rigged up the inputs. I took a 3.5mm jack and combined the ground from the left and right channels. Can you not do that? How do I fix this without running two individual mono channels? Thanks in advance!

Question by abroadhead   |  last reply


audio amplifier transistor? Answered

I pulled what looked like a voltage regulator from a PSU, i guess as it turns out its not? apparently its a audio aplifier transistor, but what would that be doing in a PSU? if its any use, it was near a fan connector on a small sub-board... markings are: UTC 2SD880 (2 small, undistinguishable letters)RKOB (or 0B) i believe this is the datasheet, correct me if im wrong. http://search.alkon.net/cgi-bin/pdf.pl?pdfname=utc/2SD880_TO220.pdf

Question by zack247   |  last reply


Audio amplifier grounding

How to make proper grounding in audio amplifier circuit? How to have separate signal and power grounds?

Question by Amit222   |  last reply


Opposite Audio Question? Answered

Hi!  Well, I have some sound clips and I want to be able to generate the EXACT OPPOSITE SOUND. Therefore, when I play the clip with the normal clip, they should cancel out.... This probably sounds crazy to try, but its just a little project I'm working on.... Does anyone know a good program that can do this? Thanks!

Question by transistorguy   |  last reply


Phone to audio connector?

 I wanna rick roll my school, and our intercoms work with phones...i need to build a jack where i can plug my ipod in one end, and plug the other into the phone....is this possible? 

Question by conrad2468   |  last reply


no audio on new windows? Answered

I got all the files to fit so i put windows on it but i have no audio it has intergated audio but still no audio and i have tried a sound card but i couldnt find a driver for it any ideas

Question by knexsuperbuilderfreak   |  last reply


Adruino Audio Player?

Is it possible to make a Adruino Audio Player?  I think its possible processing-wise, but how would I add extra memory (microSD)?

Question by lol XD   |  last reply


Splitting Bluetooth Audio

Does anyone know how I might send 2 seperate pieces of audio to 2 separate actors via bluetooth headsets? ie to make 1 headset receive channel 1&2 and the other to receive audio channels 3&4. This should make for a great performance if I crack this... Thanks

Topic by Combover 


Push Button Audio?

Hello, I am building a beer pong table and would like to have a button that when hit would cause my school's fight song to play. I am confident i can do the wiring and all i just have no idea where to begin. What i am perplexed by is how to get my fight song on some sort of chip. Any ideas of what type of chip i am looking for? I really appreciate any help on this.

Topic by hilldw11   |  last reply


Audio signal help? Answered

I was going to build Amplifier with Gain = 20 Minimum Parts From this datasheet But I have no Idea how to put the signal on. I think that the signal is Vin (pin 3)  but that is one cable when a headphone has three cables. I know the red wire is right and the blue is left and the other is comm so I onley need 2. Because there is one input I need to make it one cable. Would this work (I will test what resistor I need with a voltmeter later). If I am wrong about there olny being one input can someone explane to me how to wire it.

Question by David97   |  last reply


Hacking an audio greetings card - to prevent erasure of audio-clip

I bought an audio greetings card as I wanted the recording device to put in a craft project. I've recorded the 20 second audio clip and I want to prevent accidental erasure of said audio clip. I have 2 short questions... Which wire or wires do I cut in order to disable the record button?? Can I chop the (now redundant) mic out completely (as I'm trying to reduce the thickness of the sound module as much as poss) without affecting the sound clip, will it still play if the mic is no longer in the circuit? I've included a photo showing the record and mic buttons, and the wires going to and from them. Many thanks for any advice offered :o)

Topic by badrobot-uk   |  last reply


Is there a way to embed Audio into an Instructable?

If there is, I would like to know how. I Once I get my newest project "packaged" all nice and pretty, I want to demonstrate the sound quality as opposed to the mere squeak it was before. Before and after pics below...

Topic by Goodhart   |  last reply


Bluetooth adapter for car audio

Dear all, I have a Skoda audio system integrated into my Skoda which has a cd reader plus a cd changer, but  only a CD button(no AUX available). I would like to stick inside the audio system a Bluetooth receiver so I can listen to music stored in my phone. The goal is to solder a Bluetooth receiver to the audio system without loosing the cd functionality. On top of that I would like to be able to change from one source to the other without having to use an external button like a 3PDT switch. Thanks in advance, Pedro

Topic by pcardoso73 


Help with Audio Output Transformer

Im doing this project: http://www.wikihow.com/Transmit-Audio-With-a-Laser-Penand im confused about what to connect the audio output transformer to, the one they suggested, and i do, has red and white wires on one side, and green, black, and blue wires on the other, with the black in the middle. Where do i conenct them?

Topic by um0123   |  last reply


Building audio receiver for car?

Kindly bare with my stupid queries as i am new to all of this.   I searched different projects on this website but I couldn't figure the the connections properly.   I want to build a bluetooth audio receiver that can be used in the car.   I have an old bluetooth dongle that I used to get bluetooth connectivity on my desktop. Can it be used? If yes, then please describe the connections of the female 3.5mm jack with a diagram as I am a newbie.  Will the sound quality be good?

Question by AaravC   |  last reply


Motion sensor audio device

Hi. I wanted to make a device that would play a piece of audio that I recorded when I trigger some sort of motion sensor. I don't know what parts I would actually need as far as a motion sensor, a record/playback device, or other misc parts. I have a fair understanding of resistors and voltage but I'm pretty much a beginner. If anyone could point me in the right direction, that would be well appreciated.

Topic by ThePanda   |  last reply


Sync audio to paralell port?

Hi all, i was wondering if i could sync any audio on the pc to the paralell port output. PLZ REPLY!

Question by sci4me   |  last reply


Transmit & receive 4ch audio

I am looking for a cheap solution to transmit and receive 4 channels of audio.Transmitter may be bulky, but the receiver must be small. (it is for an interactive installation)Audio The 4 channels will be converted to 2 channels stereo, so in total 2 stereo signals of audio need to be transmitted and received (within ~10 meters). Note that achieving the best audio quality is not of top priority.Technique Should I be looking at FM / AM of Bluetooth methods? I've looked at: https://www.adafruit.com/product/1958, but it would be nice if there is also a paired receiver board.It would be nice if the proposed solution is scalable to 6 channels (3 channels stereo).

Question by LudoP4 


Raspberry Pi sensing audio?

Hi all -- I have been programming all kinds of things all my life, but I have never had a chance to build a program that responds to audio input.  Suddenly: Dancing Baby Groot.  I have a great idea for an algorithm for making a very clever and funky Dancing Baby Groot using Raspberry Pi or Arduino -- if I can figure out how to get the processor to "listen" to audio input. How would I get one of those processors (or any processor) to "listen" to the mic and translate it into either digital or analog data which one could then plunder to figure out the tempo and beat in order to get Baby Groot to Dance?  I am 100% sure I can do the plundering (because it works on digital files) if I can get the processor to "listen" to the mic and create a file of numbers which represent the music being played. Any suggestions?

Topic by TheFrankTurk   |  last reply


Guitar pedal audio splitter?

Hello everybody. I need some advice on something I have on my mind, but I lack the knowledge to make. I have a guitar pedal, to which I added a 3.5 mm audio out to plug my headphones to. Now, I'd like to have an audio in jack, to which I could plug my PC, and listen to the base track while playing.  I think this should be very simple to add, but you never know.  Can somebody give me some schematics to follow? Thanks a lot :)

Question by en_rov   |  last reply


free audio editing software

I need software that will let me cut and paste audio out of a long recorded wav file. anyone know of such? (i know i should look on download.com, but i can never find anything there, and it frustrates me, so please no website suggestions)

Topic by wingman246   |  last reply


Arduino audio pitch shifter

Is there any arduino libraries for shfiting the pitch of audio? I'd like to make something like  http://hackaday.com/2011/03/17/pitch-shifter-makes-your-band-sing-higher/ but I'm not sure if I can with arduino. I don't need all the code, just a guide as to what library to use. Thanks!

Question by 4lifenerdfighter   |  last reply


Full Duplex Wireless Audio

Hi, I'm in need of some help with a project I'm working on. I'm looking to build a handsfree two way audio communication circuit but I've been getting very confused when looking at material online and don't know where to look or how to even start. I've been looking into full duplex communication but I have no idea how to implement this in a circuit I could build. I'm confused as to if I would need a microcontroller (probably an arduino) or not and what transceivers and antennas to use. If anyone could show me where to look or help me get a starting point your help would be much appreciated. Thank you.

Topic by ArnoldM27   |  last reply


Problem with audio-cables/soldering

I bought sum cables (dual-lines) and want to solder stereo jacks, but then i found out that a phone jack got three points to solder although there are only two cable-lines leavin the jack - i would like to know how to solder that. The project is: We got a flat share here and i wanted to connect all computers (that got stereo jacks) with a switch (4 connectors per channel) and connect the switch with a pair of boxes in our kitchen so that we can chose the line in from the switch and not have to pump up the volume in our rooms to listen to our music while being in our kitchen; so there's 3 computers[stereo jack out] -> [4 line cable-ins]switch->[4 line cable outs] -> [not defined in; eventually stereo jack outs->stereo jack in-active-]boxes and i got this dual-lined cable (solid twisted copper; 100meters-spin), a pack of each kind of stereo jack plugs. What do i do to get sound?

Question by Luziviech   |  last reply


Simple Audio to Button interface?

Dear Highly esteemed members of Instructables, I've had this Idea in my head, and I REALLY want to make it possible. I have a feeling that doing so would be a cinch if I had any sort of understanding of wiring at all. Basically, this is my idea. I want to use old buttons (and possibly an analog stick) from a gamecube or n64 controller and wire them so that they play a note when pressed. I don't necessarily need to include the analog stick in my design, if doing so would make the project a good deal harder. I'm looking to include about five buttons. And if the analog stick was included , at best I would want it to move the note in half steps, up or down, but I could also settle for setting it to it's own four notes, or not using it at all. As aforementioned, I have no Idea how any of this stuff works, or if it is even possible. So do let me know if this is even something that someone like me can do. And if it is, try to err on the side of over explaining if you can help it.

Topic by jdiggs1   |  last reply


Palm T3 Audio problems

I've been using a palm t3 as a MP4 player for about a year now and haven't had any problems with it until recently. About a month ago I built a 30 Watt amp to use with it but there was a lot of noise when I played music on it. So I was wondering if any one knew if this was a common problems with palms or if it could be fixed. Any help would be much appreciated.

Topic by adrunkguy 


Convert Audio file to Text

Affordable , Accurate, Time Bound and Quality Services.  If you are searching reliable companies for transcribe your audio and video files, then kindly visit at Outsourcing Transcription Services.

Topic by DavidRobinson   |  last reply


need details on audio amplifier

I want to design and implementation an audio amplifier, and i was needing your help. thanks

Question by mukundwa   |  last reply


Connect two audio amplifier ?

Hi, I would like to make a very powerful 80w bluetooth speaker, but the only great audio amplifier that I found has only two output for speakers. So I was wondering if it will be possible to buy two and connect the first audio amplifier to the second one ?  Cheers, PS : here is the audio amplifier and the speakers that I will use :  http://www.ebay.fr/itm/232053348992 http://www.ebay.fr/itm/272387157947

Question by EgeK2   |  last reply


streaming audio between PC's? Answered

i would like to be able to connect my laptop's audio somehow to my PC first i thought i'd just connect the headphone out to the mic in on my PC, but that gives *alot* of interference, altough i do hear my music after that i tried searching for some software that would just stream it to my PC, but all i could find was software to stream to PS3's, stereo's and other stuff so my question is: how can i stream/connect the audio from my laptop to my PC?? edit: solved with a couple of resistors in the cable

Question by godofal   |  last reply


Usb to audio out adapter?

Some stereos now have female usb sockets built into them to play music from a memory stick. Mine does not, which is why I am looking to make/buy a usb to 3.5mm audio out device that can read the files on my memory stick and output them as audio. I have done a concept picture using professional editing software 'Paint', but the sd card reader is not really that necessary. It could also be battery powered, the picture is just a basic idea of what I want. I have spare computers I could raid for parts if I need. Any help would be appreciated either building or buying such a device, but low costs for both are a big need.

Question by swass1   |  last reply


DC power to audio jack?

I have a pair of airline headphones that have a standard 3.5mm jack for the audio but require power to an additional 2.5mm jack in order to work. I'm looking to use them with a desktop PC so thought about getting the power supply from the USB but am a little confused about how I can get it there, I've had a look around on ebay to see if there was someone that was selling a 2.5mm female to USB jack but havent managed to find what I need. Do these things even exist? Or would I need to get myself a 2.5mm female connection and wire it up to a USB lead myself?

Question by ChrisT303   |  last reply


how do i use the DPDT toggle switch, and have two audio input and one audio output

I would like to use it to have to audio input and have one output to my amp

Question by KdogK   |  last reply





Locker alarm Answered

I want to know how to make a song play every time i open my locker using my mp3 player and please keep it under $30

Question by deidei2299   |  last reply


building a HD Audio front panel for my PC. Audio circuit?

Hi! I have problem with my computer. the motherboard has HD-Audio but the front panel is the usual AC97 standard. You can change the BIOS config so the front panel audio connector acts as an AC97 one, but then the problem is the speakers connected to the back keep playing even if you connect a set of headphones to the front panel. The reason is the audio jacks used for HD-audio are different from regular jack connectors (and very rare to find!). While the insertion of the plug in a regular jack connector results in breaking a circuit (and so, physically muting the loudspeakers), in an HD Audio jack, the insertion of the plug results in closing a switch (sending a signal to the driver ordering to mute the speakers by software). I managed to create a sort of HD audio Jack by combining a regular jack connector and a zero pressure micro-switch so when the plug enters the hole, a tip inside the hole closes the micro-switch. I wanted to make a good quality front panel so instead of just wiring the jack connectors (and micro-switches) to the cable, I decided to add an EMI filter. I took the circuit from this doc: http://www.formfactors.org/developer/specs/A2928604-005.pdf and more precisely from fig 6 at page 25. The circuit uses two 220 pF capacitors and two inductors for each jack connector. In this aspect the circuit is identical to that proposed for AC97. The problem is I have no idea what inductors to use or how to ask for them at the shop. All the diagram says in a footnote is: ZL should be 600 Ohms or greater @ 100MHz with a low Q (broad Impedance curve over frequency) but not even the guys at the shop knew what piece to give me. So what I did was to cannibalize the inductors from two cheap promotional radio receivers with jack connectors for the headphones and use them for my circuit. After all, they perform the same function: filter the audio signal at the headphone connector so I supposed they should have the correct values I needed. But my circuit is very noisy! headphones have a constant electronic background noise (that seems to react to things like mouse movements, hard disk activity or whiteness of the screen) and microphone has a lot of noise (of course I'm using very good quality mic+headphone). The cables are audio cables for front panel audio so they are supposed to be correctly shielded so the problem is in the circuit at my custom board. I would like to make a tutorial (including HD Audio connector construction) once the front panel is working properly but I don't know how to fix it. Any ideas?

Topic by jedikalimero 


building a HD Audio front panel for my PC. Audio circuit? Answered

Hi! I have a problem with my computer. the motherboard has HD-Audio but the front panel is the usual AC97 standard. You can change the BIOS config so the front panel audio connector acts as an AC97 one, but then the problem is the speakers connected to the back keep playing even if you connect a set of headphones to the front panel. The reason is the audio jacks used for HD-audio are different from regular jack connectors (and very rare to find!). While the insertion of the plug in a regular jack connector results in breaking a circuit (and so, physically muting the loudspeakers), in an HD Audio jack, the insertion of the plug results in closing a switch (sending a signal to the driver ordering to mute the speakers by software). Since I can't find this kind of jacks anywhere, I managed to create a sort of HD audio Jack by combining a regular jack connector and a zero pressure micro-switch so when the plug enters the hole, a tip inside the hole closes the micro-switch. I wanted to make a good quality front panel so instead of just wiring the jack connectors (and micro-switches) to the cable, I decided to add an EMI filter. I took the circuit from this doc: http://www.formfactors.org/developer/specs/A2928604-005.pdf and more precisely from fig 6 at page 25. The circuit uses two 220 pF capacitors and two inductors for each jack connector. In this aspect the circuit is identical to that proposed for AC97. The problem is I have no idea what inductors to use or how to ask for them at the shop. All the diagram says in a footnote is: ZL should be 600 Ohms or greater @ 100MHz with a low Q (broad Impedance curve over frequency) but not even the guys at the shop knew what piece to give me. So what I did was to cannibalize the inductors from two cheap promotional radio receivers with jack connectors for the headphones and use them for my circuit. After all, they perform the same function: filter the audio signal at the headphone connector so I supposed they should have the correct values I needed. But my circuit is very noisy! headphones have a constant electronic background noise (that seems to react to things like mouse movements, hard disk activity or whiteness of the screen) and microphone has a lot of noise (of course I'm using very good quality mic+headphone). The cables are audio cables for front panel audio so they are supposed to be correctly shielded so the problem is in the circuit at my custom board. I would like to make a tutorial (including HD Audio connector construction) once the front panel is working properly but I don't know how to fix it. Any ideas?

Question by jedikalimero   |  last reply


How do I put audio on an instructable? Answered

To enter a contest, I need audio in an instructable.

Question by woody558   |  last reply


visitor friendly audio devices for exhibits

I am coordinating an exhibit on musical instruments and want to include a bunch of sound clips of music demonstrating how the instruments on display would sound if played. Does anyone have any suggestions for audio devices that could do this but still be (a.) cheap, (b.) sustain a lot of hands on activity,(c.) have good sound quality, and (d.) have the ability to be manipulated relatively easily by our visitors? Thanks for your help!

Topic by agentshna   |  last reply


is there any good free audio editing software? Answered

I want to be able to take music I have (legally) and change it around like remove the vocals or take out the bass and all that jazz.

Question by dafweak   |  last reply