Echo while recording

im having a problem with recording vocals.i am using LE8 with a m-audio mobile pre usb interface.when i enable the record ready button and record the vocals it sounds like im in the middle of a cave,nuthin but echo.during playback the audio sounds normal.hopefully somebody can help me sort out this issue im having.i dont think its a software malfunction,its probably me causing this.

I am using the r button on the track for record.I have a closet in my room that has been turned into a booth.speakers are out side the booth in the room.I always monitor using headphones while recording vocals and always turn my speakers off during this process.I am aware of the feedback issue with using the mic and speakers in the same area.i have also tryed to mute sound.If i am in the booth with headpones on and speak into the mic it sounds like i am 100 ft away from the mic.ive also tryed putting the mic in a completly different room 40 feet from the monitoring area.guitar center recommended that i buy another preface but i dont see this being the problem.i want to try to fix it the best i can without purchasing more equiptment.thanx again for all the assistance.it is much appreciated

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[HELP] problem of ECHO during record.

Hello experts,
I have used a java code for sound record and playback from one of the threads in this forum.
But i am hearing an ECHO while recording as well as playback. That means the echo is getting stored.
i'm attaching the code.can u please suggest me any method for ECHO Cancellation.thanks a lot in advance...
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.media.control.RecordControl;
import javax.microedition.media.Manager;
import javax.microedition.media.MediaException;
import javax.microedition.media.Player;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
public class recordMidlet extends MIDlet implements CommandListener
private Form init = new Form("info");
private Command rec = new Command("rec",Command.OK, 1),
stop = new Command("stop",Command.STOP, 0),
exit = new Command("exit",Command.EXIT, 0);
private byte[] recordedSoundArray;
private Player p;
private RecordControl rc;
private ByteArrayOutputStream output;
public void startApp()
init.addCommand(rec);
init.addCommand(stop);
//init.addCommand(exit);
init.setCommandListener(this);
Display.getDisplay(this).setCurrent(init);
public void pauseApp()
public void destroyApp(boolean unconditional)
class dorecord extends Thread
public void run()
try
init.append("record voice ...\n\n");
// Create a Player that captures live audio.
p = Manager.createPlayer("capture://audio?encoding=pcm&rate=8000&bits=16");
p.realize();
// Get the RecordControl, set the record stream,
rc = (RecordControl)p.getControl("RecordControl");
output = new ByteArrayOutputStream();
rc.setRecordStream(output);
rc.startRecord();
p.start();
catch (Exception ioe)
init.append(ioe.toString());
class stopplay extends Thread
public void run()
try
init.append("finish record... starting playback\n\n");
rc.stopRecord();
rc.commit();
p.stop();
p.close();
init.append("playing...\n");
recordedSoundArray = output.toByteArray();
init.append("recorded sound = " String.valueOf(recordedSoundArray.length)"\n\n");
ByteArrayInputStream recordedInputStream = new ByteArrayInputStream(recordedSoundArray);
Player p2 = Manager.createPlayer(recordedInputStream,"audio/x-wav");
p2.prefetch();
p2.start();
//init.append("finish playing...");
catch (Exception e)
init.append("stop command: "+e.toString());
public void recordaud()
new dorecord().start();
public void stopplaying()
new stopplay().start();
public void commandAction(Command com, Displayable dis)
if(com == exit)
notifyDestroyed();
else if(com == stop)
init.removeCommand(stop);
init.addCommand(exit);
stopplaying();
else if(com == rec)
recordaud();

The attached VI will take care of phase jumps in either direction. I developed this for another project and it may need modification for your application.
Have you tried a smoothing filter or sliding window averager to get rid of your noise? These often work better than a simple lowpass filter.
When the system is moving slowly or stopped recalling the last valid position and allowing only small adjustments to it may prevent the big jumps. In other words, if you can't beat the noise, ignore it. This can be easy to talk about but is not always so easy to implement.
Lynn
Attachments:
Phase Unwrapper.vi ‏51 KB

CS4 Audio echoes while capturing

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Hi Anamika,
If you are running your query in Web Portal, it seems your web portal is not defined in RFC connection with system. Ask BASIS to connect it.
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Edited by: Harpalsinh Gohil on Aug 17, 2009 2:53 PM

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Hi,
     I m doin BDC recording for tcode F-02, i m getting a pop-up screen stating as, Coding Block ...asking Transaction type....
      This pop-up apperas only while recording, if i extend G/L without recording i m not getting this pop-up and the G/? will extending directly...
      With this my flatfile getting mismatched and getting error while uploading....
Give me any slovable solution for this.....
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Some fields are missing while recording through shdb

Dear Abapers,
I am doing bdc for F-27 t.code.Some fields,cobl-gsber(business area),cobl-kostl(Cost center) are missing while recording through SHDB.But when do it manualy the fields are displaying.Also i have ddded those fields manualy in the program,stll the fields are not getting captured.May anyone pls help me,why this problem is happening?What is the solution for this.
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hi
i can tell u that few transactions wont suffice us with BDC,so for such transactions we do bdc with similar kind of transactions.
ie., The transactions FB60 and f-63 both are meant for Parking.
But we cant do bdc for FB60 Parking. So we do bdc for f-63.
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@uliwooly This one i recorded today morning. The audio starts good & clear at the begining but just after one second it drops & then you can hear the bus engine sounds like waterfall. Here is the youtube link https://www.youtube.com/watch?v=5H1jNxyYMlw Here's another video uploaded by a review site with the same problem https://www.youtube.com/watch?v=z3vKwydfN6U & more from youtube https://www.youtube.com/watch?v=-GLLj2ommP4 then i used a third party audio recorder with mic switch option https://www.youtube.com/watch?v=D6d4uAEZFRE as usual with the rear mic the gain suddenly drops after second & you can hear some weird sounds like a "movie bomb" sound at 00:04, "rattle snake" sound at 00:05 & 00:12 & with the front mic starts at 00:17 you can hear the difference. It's mono but so clear & sharp. Finally, as i dont have the mic swith option while recording video, all videos i record will have the same problem. This is definitely not the typical "sony" thing to carry on.

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Echo while recording

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