?
Solved

Controlling recording Input level

Posted on 1997-10-27
4
Medium Priority
?
193 Views
Last Modified: 2013-12-03
I want to control the input (gain) level from the microphone. I've looked through the Window's API and see nothing for doing this. I've manually set the mic recording level to it's highest position and set the mic boost check box in the volume control dialog, but the recording is still way too low. On the Mac, I can set either an automatic gain control or set the recording level manually. I've tried several types of mic's and visited the jumpers for the sound card but nothing helps. If you speak 4 feet from the mic and in a normal volume you cannot clearly hear the audio. I'm recording speech in a quiet location and need high input gain.
0
Comment
Question by:RadNetGML
[X]
Welcome to Experts Exchange

Add your voice to the tech community where 5M+ people just like you are talking about what matters.

  • Help others & share knowledge
  • Earn cash & points
  • Learn & ask questions
  • 2
  • 2
4 Comments
 

Author Comment

by:RadNetGML
ID: 1407925
Edited text of question
0
 
LVL 23

Accepted Solution

by:
chensu earned 300 total points
ID: 1407926
You can use Win32 Audio Mixers API (mixer*() functions) to control it. There is a sample "Mixapp: Sample Mixer Application" that comes with Win32 SDK.
0
 

Author Comment

by:RadNetGML
ID: 1407927
The specific calling order for the mixer and what api for the
input volume would of been great. Thanks for pointing me in the
right direction.

0
 
LVL 23

Expert Comment

by:chensu
ID: 1407928
1. mixerOpen()
2. mixerGetLineInfo() (MIXERLINE_COMPONENTTYPE_DST_WAVEIN or MIXERLINE_COMPONENTTYPE_SRC_MICROPHONE)
3. mixerGetLineControls() (MIXERCONTROL_CONTROLTYPE_VOLUME)
4. mixerSetControlDetails()
5. mixerClose()

0

Featured Post

Free Backup Tool for VMware and Hyper-V

Restore full virtual machine or individual guest files from 19 common file systems directly from the backup file. Schedule VM backups with PowerShell scripts. Set desired time, lean back and let the script to notify you via email upon completion.  

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

What my article will show is if you ever had to do processing to a listbox without being able to just select all the items in it. My software Visual Studio 2008 crystal report v11 My issue was I wanted to add crystal report to a form and show…
Whether you've completed a degree in computer sciences or you're a self-taught programmer, writing your first lines of code in the real world is always a challenge. Here are some of the most common pitfalls for new programmers.
This is Part 3 in a 3-part series on Experts Exchange to discuss error handling in VBA code written for Excel. Part 1 of this series discussed basic error handling code using VBA. http://www.experts-exchange.com/videos/1478/Excel-Error-Handlin…
NetCrunch network monitor is a highly extensive platform for network monitoring and alert generation. In this video you'll see a live demo of NetCrunch with most notable features explained in a walk-through manner. You'll also get to know the philos…

770 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question