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Simple audio recording program

, 12 Jul 2007
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Simplest way to record sound...

Sample Image - SoundRecord.jpg

Introduction

This sample program make use of waveInxxxx functions to read from an audio input device like a sound card and write it to a .wav file using mmioxxx functions. It is one of the simplest way to record sound with all the format capabilities supported by the hardware device

Initially, by using waveInGetNumDevs, we can find all the devices and then by using waveInGetDevCaps, we can find the formats it is supported.

To start recording, first select a device and then open the device with waveInOpen API call with the specified format (i.e. 16 bit etc). The output file is also prepared with all the headers filled in properly. Here i am using only PCM format which is easy. If you have more codecs installed on your PC, you can change that one also. But be sure that you supplied the proper values in the WAVEFORMATEX structure.

waveIn needs buffers to start recording. It is better to give more buffers for buffering to avoid any delays. I have used 3 here, but you can add more if your PC needs more time in writing to the HDD and thus causing the delay. Once the buffers are added in the queue, waveInStart will start recording. For each data chunk, the callback function specified in the waveinOpen will get the buffers. Just write it to the file and mark the buffer again for recording by calling the same addbuffer fn.

Once done with recording, adjust the chunk headers using the mmioascend APIs. Thats it.

License

This article has no explicit license attached to it but may contain usage terms in the article text or the download files themselves. If in doubt please contact the author via the discussion board below.

A list of licenses authors might use can be found here

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About the Author

Saneesh
Software Developer (Senior)
United States United States
I am from the beautiful sea side town called Kochi ( cochin), Kerala, South India.

Comments and Discussions

 
GeneralMy vote of 3 Pinmemberglp332924-Nov-13 21:59 
QuestionWhere/How does it write? PinmemberMember 923082025-Jul-12 4:56 
AnswerRe: Where/How does it write? PinmemberSaneesh26-Jul-12 3:52 
GeneralMy vote of 5 Pinmemberwserra6-Jul-12 21:06 
GeneralMy vote of 2 Pinmemberarjo12930-Jun-12 14:59 
GeneralRe: My vote of 2 Pinmemberwserra6-Jul-12 21:08 
GeneralRe: My vote of 2 PinmemberSaneesh8-Jul-12 12:40 
GeneralRe: My vote of 2 Pinmemberwserra8-Jul-12 17:00 
GeneralCan you help? PinmemberMember 779661522-Apr-11 19:44 
GeneralWon't compile using Visual Studio 2010 (SP1) PinmemberMichael B Pliam13-Apr-11 9:58 
GeneralRe: Won't compile using Visual Studio 2010 (SP1) PinmemberSaneesh23-Apr-11 4:12 
AnswerRe: Won't compile using Visual Studio 2010 (SP1) Pinmembertom tom tom tom tom5-Oct-11 0:37 
GeneralRe: Won't compile using Visual Studio 2010 (SP1) PinmemberSaneesh5-Oct-11 4:45 
Thanks..
 
I cant believe that people are still reading my old posts !!!
Saneesh

Generalsource code Pinmembersunilpatilgs16-Mar-11 19:01 
Generalgetting waveform n samples Pinmembersunilpatilgs10-Mar-11 23:28 
GeneralRe: getting waveform n samples PinmemberSaneesh11-Mar-11 5:58 
GeneralRe: getting waveform n samples Pinmemberpeppelisme5-Jun-11 7:17 
Questionhow to display wave form Pinmembersunilpatilgs8-Mar-11 18:00 
AnswerSanesh can you contact me? PinmemberMember 77377838-Mar-11 21:16 
GeneralRe: Sanesh can you contact me? PinmemberSaneesh9-Mar-11 4:15 
AnswerRe: how to display wave form PinmemberSaneesh9-Mar-11 4:15 
GeneralMy vote of 5 Pinmemberboyewa13-Sep-10 7:30 
Generalwriting audio to serial port Pinmemberabhishek50500426-Mar-10 20:27 
GeneralRe: writing audio to serial port PinmemberSaneesh21-Apr-10 5:22 
GeneralTimer is not working when recording a sound PinmemberNightBeforeChirstmas13-Jan-10 22:32 

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