Low signal from mic

Hi, I am new to this. I have a Lexicon Alpha and AKG D44 mic plugged into Garageband. The system works but the input signals are very low - esp. when recording an acoustic guitar. What am I doing wrong? Thanks. Alex

Assuming you are using the 1/4" inputs on the Alpha:
The 1/4 inputs on the Alpha are not made to take your mic input.
You can try a 1/4" female phone jack to XLR male plug and plug into the XLR mic jack.
Which should give you the proper input for that mic.
http://www.zzounds.com/item--CBIAN425
If you are not happy with those results then I would suggest stepping up to a decent dynamic mic like a Shure SM57.

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Hi people,
I wish to do a real time program that capture the data (+the ADC discrete digitized sound data+) from mic then store the data in memory...
Then my program retrieve the data continuously from the memory (as long as there are captured data from mic)
But i have no idea how JAVA deal with real time program that use memory to store the captured data.
i do know that JAVA do have class INPUTSTREAM to deal the real time thing that fetch the byte of data to program. But still wish to get more reference from here (never use this class before).
Please advise how can i start from "signal" the mic to store the captured data to memory and my program able to retrieve the data from memory then work my algorithm on it.
Or can correct me how actually i should store the captured data... i should store the data in memory or store the data as a variable?
MANY MANY MANY MANY thanks!!! Very appreciate for the advise and i will give my attempt :-).

I m sorry..
I was intend to ask the correct way to store the digitized data from microphone.
As all my previous work were storing the keyboard input as an declared variable or store in local server database.
But this time i wish to store the captured and quantized sound data from mic and no idea where should i start from...
Please give me some advise please.
I dun wish to save what i captured as a .wav file then only process the .wav file data.
But wish to process the data that was captured at instant.
I m very appreciate for your advise here.

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+*Lets start with your hardware first. Lets assume all your connections are correct and cables are in good working order:*+
Is there anyway to verify that signal is getting to the Firebox from your mica such as an LED VU/db meter and is the preamp level set appropriately on the firebox? No signal here means no signal into Logic.
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XBrav,
Way to go, yes I do agree with XBrav wilkster. If you can check the screen shot that XBrav provided.
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Hi, I am trying to take the audio from the mic (at javasound://0), process it (add the JMF API sample plug in GainEffect.java) and then play the processed data source. The code I have so far is below.
I am getting no errors - compiles fine - but nothing seems to be happening.
The grand goal is to take the audio being captured from the mic and process it in real time using a plug in (not necessarily GainEffect) and also play it back (the processed audio) at the same time.
Where am I going wrong? Thanks!
import java.io.IOException;
import java.util.Vector;
import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.format.AudioFormat;
import javax.media.protocol.DataSource;
public class audioProcess {
     public static void main(String[] args){
          CaptureDeviceInfo audioCapDevInfo = null;
          Vector audioCapDevList = null;
          Vector plugIn;
          Player p;
          Processor pro = null;
          TrackControl[] tracks;
          DataSource ds;
          Vector plug;
          TrackControl audioTrack = null;
          AudioFormat audFormat = new AudioFormat(
               AudioFormat.LINEAR,
               44100,
               16,
               2,
               AudioFormat.LITTLE_ENDIAN,
               AudioFormat.SIGNED,
               16,
               Format.NOT_SPECIFIED,
               Format.byteArray);
          Format[] alinear=new AudioFormat[]{new AudioFormat(     AudioFormat.LINEAR,
                    44100,
                    16,
                    2,
                    AudioFormat.LITTLE_ENDIAN,
                    AudioFormat.SIGNED,
                    16,
                    Format.NOT_SPECIFIED,
                    Format.byteArray)};
        audioCapDevList = CaptureDeviceManager.getDeviceList(audFormat);
        if ((audioCapDevList.size() > 0)) {
             audioCapDevInfo = (CaptureDeviceInfo) audioCapDevList.elementAt(0);
            audioCapDevLoc = audioCapDevInfo.getLocator();
        MediaLocator dest = new MediaLocator("javasound://0"); //take sound captured directly from microphone
        try{
             PlugInManager.addPlugIn("GainEffect", alinear, alinear, 3);
             plug = PlugInManager.getPlugInList(audFormat, audFormat, 3);
             int vectorSize = plug.size();
             if(plug.elementAt(vectorSize - 1).equals("GainEffect")){
                  plug.removeElementAt(vectorSize - 1);
                  plug.insertElementAt("GainEffect", 0);
                  PlugInManager.setPlugInList(plug, 3);
                  PlugInManager.commit();
             pro = Manager.createProcessor(dest);
             pro.configure(); //must configure before call getTrackControls
             while(pro.getState() != Processor.Configured);
             tracks = pro.getTrackControls();
             for (int i = 0; i < tracks.length; i++){
                  if(tracks.getFormat() instanceof AudioFormat){
               audioTrack = tracks[i];
               break;
     //add plug in effect
     try{
          Codec codec[] = {new GainEffect()};
          audioTrack.setCodecChain(codec);
     } catch (UnsupportedPlugInException e){
     pro.realize();
     while(pro.getState() != Processor.Realized);
     ds = pro.getDataOutput();
     p = Manager.createRealizedPlayer(ds);
     p.start();
catch(NoPlayerException e){
     e.printStackTrace();
} catch (IOException e) {
          e.printStackTrace();

Ok, I narrowed my code down to this. There doesn't appear to be any infinite loops in the code now, but perhaps I'm wrong? The processor is realizing, and I am creating a player with the data source output from the processor, yet there still is nothing playing... which leads me to think that there is something wrong with my plug in implementation or my processor creation. Do you have any ideas or points in the right direction?
import java.io.IOException;
import java.util.Vector;
import javax.media.*;
import javax.media.control.TrackControl;
import javax.media.format.AudioFormat;
import javax.media.protocol.DataSource;
public class audioCapture {
     public static void main(String[] args){
          MediaLocator audioCapDevLoc = null;
          CaptureDeviceInfo audioCapDevInfo = null;
          Vector audioCapDevList = null;
          Vector plugIn;
          Player p;
          Processor pro = null;
          TrackControl[] tracks;
          DataSource ds;
          Vector plug;
          TrackControl audioTrack = null;
          AudioFormat audFormat = new AudioFormat(
               AudioFormat.LINEAR,
               44100,
               16,
               2,
               AudioFormat.LITTLE_ENDIAN,
               AudioFormat.SIGNED,
               16,
               Format.NOT_SPECIFIED,
               Format.byteArray);
          Format[] alinear=new AudioFormat[]{new AudioFormat(     AudioFormat.LINEAR,
                    44100,
                    16,
                    2,
                    AudioFormat.LITTLE_ENDIAN,
                    AudioFormat.SIGNED,
                    16,
                    Format.NOT_SPECIFIED,
                    Format.byteArray)};
        audioCapDevList = CaptureDeviceManager.getDeviceList(audFormat);
        if ((audioCapDevList.size() > 0)) {
             audioCapDevInfo = (CaptureDeviceInfo) audioCapDevList.elementAt(0);
            audioCapDevLoc = audioCapDevInfo.getLocator();
        try{
        MediaLocator dest = new MediaLocator("javasound://0"); //take signal from soundcard
             PlugInManager.addPlugIn("GainEffect", alinear, alinear, 3); //register plug in
             plug = PlugInManager.getPlugInList(audFormat, audFormat, 3);
             int vectorSize = plug.size();
             if(plug.elementAt(vectorSize - 1).equals("GainEffect")){ //take the last plug in
                  plug.removeElementAt(vectorSize - 1);
                  plug.insertElementAt("GainEffect", 0);
                  PlugInManager.setPlugInList(plug, 3);
                  PlugInManager.commit();
             pro = Manager.createProcessor(dest);
             pro.configure(); //must configure before call getTrackControls
             while(pro.getState() != Processor.Configured);
             tracks = pro.getTrackControls();
             for (int i = 0; i < tracks.length; i++){
                  if(tracks.getFormat() instanceof AudioFormat){
               audioTrack = tracks[i];
               break;
Codec codec[] = {new GainEffect()}; //add plug in effect
     audioTrack.setCodecChain(codec);
     pro.realize();
     while(pro.getState() != Processor.Realized); //don't move on until realized
     ds = pro.getDataOutput();
     p = Manager.createRealizedPlayer(ds); //create a player using the data source from the processor
     p.start();
catch (IOException e){
     e.printStackTrace();
catch (CannotRealizeException e){
     e.printStackTrace();
catch(NoPlayerException e){
     e.printStackTrace();
catch(UnsupportedPlugInException e){
     e.printStackTrace();
PS - sorry for the late reply.

WMP600N - weak connection and low signal - Windows 7 x64

I bought the WMP600N because Linksys and Microsoft listed it as 'compatible' for Windows 7 x64.
My experience:
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Message Edited by Storm_dutch on 12-20-2009 09:51 AM
Message Edited by Storm_dutch on 12-20-2009 09:52 AM

I'm not sure about you guys, but I use WMP600N and running Windows 7 64bit without any issues. The driver that I'm using now is Driver Version: 3.0.2.0, Driver Provider: Ralink Techonolgy Corp, Driver Date: 6/19/2009. Here's what I did when I upgrded my wireless adapter. 1. Uninstall the original wireless driver from device manager. 2. Turn off the computer and phisically removed the wireless adapter from my computer. 3. Pop in the new WMP600N and turn on the computer. 4. Windows 7 then automatically detects the new adapter and intall the proper driver for it. Well, that's all I did. The whole process is very simple and straight forward.

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BigDaddyTees wrote:
I’m sort of glad I didn’t opt for a 1080p tv then as in my case it probably would have been a waste, aside from playing BLU ray disk/HD video games. I’m someone who mostly watches their tv and occasional does other things with it (see above.)
All channels are already distributed in compressed format (typically MPEG-2). Some cable providers pass the local HD channels as they receive them, but virtually all apply additional compression on the cable HD channels (i.e. they re-compress). Verizon FiOS is the only major provider does not recompress any of its HD channels to save bandwidth. FiOS does recompress a few [mostly premium] channels distributed in MPEG4 format, but only to redistribute them in MPEG2 for those without MPEG4-capable receivers.
Not all content providers allocate and equal bitrate to their HD channels. Most channels are distributed via rented capacity on satellite, and that costs serious money, especially for content providers that supply mutiple HD channels. More budget consious content providers may use lower bitrates, either to minimize satellite carriage costs and/or make their channels more enticing to cable providers that face severe bandwidth constraints. If a particular cable provider is constrained for bandwidth, they may be willing to add a $10,000 in time and equipment to recompress TNTHD -- a channel many demand -- but they may not be as willing to do the same thing for a lesser watched channel like HGTV. Cable channels like ESPN, TNT, USA, SciFi, Hdnet, MHD, and CNBC all distribute their channels at fairly high bitrates, while cable channels like HGTV, Discovery Channel, Animal Planet, and the Science Channel are distributed with significantly lower bitrates.
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If you are the original poster (OP) and your issue is solved, please remember to click the "Solution?" button so that others can more easily find it.

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Before my mac could connect to my TV Samsungs LE32B350 without any problem, but now it just keep saying no signal from the tv. I get a blue screen when I connect the hdmi on the laptop for one sec then nothing happens. I have tried search for more screens but aint finding anything.
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Unfortunately older G4 minis are very touchy about certain hi-res monitors when run from DVI. Hi-res in this case means any monitor whose resolution causes the pixel clock to be above 135 MHz. It is normally the case that 1680 x 1050 timing will have a pixel clock above 135 MHz, although there is no way to observe that directly from within OS X.
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Low signal from mic

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