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Hi Everyone.
I'm developing an application which needs to record voice from microphone and save it in a wav file.
But the voice being recorded, isn't clear, it's lost some part something like 1-0-1-0-1-0-1...
which the 1s indicate the voice is present and the 0s indicate that there's no voice present, each ones duration is about 500ms.
Here is my code. Where is the problem?
mem2Write[uu] = new MemoryStream();
captureDeviceCollection = new CaptureDevicesCollection();
DeviceInformation deviceInfo = captureDeviceCollection[sh];
CaptureBufferDescription captureBufferDescription = new CaptureBufferDescription();
captureBufferDescription.BufferBytes = waveFormat.AverageBytesPerSecond / 5;
captureBufferDescription.Format = waveFormat;
BufferDescription playbackBufferDescription = new BufferDescription();
playbackBufferDescription.BufferBytes = waveFormat.AverageBytesPerSecond / 5;
playbackBufferDescription.Format = waveFormat;
SecondaryBuffer playbackBuffer = new SecondaryBuffer(playbackBufferDescription, device);
int bufferSize = captureBufferDescription.BufferBytes;
Capture capture = new Capture(deviceInfo.DriverGuid);
CaptureBuffer captureBuffer = new CaptureBuffer(captureBufferDescription, capture);
CreateNotifyPositions(captureBuffer, bufferSize);
//int halfBuffer = bufferSize / 2;
int tenBuffer = bufferSize / 10;
//int halfBuffer = bufferSize;
captureBuffer.Start(true);
//bool readFirstBufferPart = true;
int readFirstBufferPart = 0;
int offset = 0;
mem2Write[uu].Position = 0;
MemoryStream memStream = new MemoryStream(tenBuffer);
bStop = false;
while (!bStop)
{
autoResetEvent.WaitOne();
memStream.Seek(0, SeekOrigin.Begin);
captureBuffer.Read(offset, memStream, tenBuffer, LockFlag.None);
//readFirstBufferPart = !readFirstBufferPart;
readFirstBufferPart= (readFirstBufferPart+1)% 10;
//offset = readFirstBufferPart ? 0 : thirdBuffer;
offset = tenBuffer * readFirstBufferPart;
//TODO: Fix this ugly way of initializing differently.
//Choose the vocoder. And then send the data to other party at port 1550.
//dataToWrite
mem2Write[uu].Write(memStream.GetBuffer(), 0, (Int32)memStream.Length);
mem2Write[uu].Position += (Int32)memStream.Length;
}
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you have to show us where is the line of your code that getting an exception then we can help you.
so where is your problem ??? 
dhaim
programming is a hobby that make some money as side effect 
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Hei Mbah, thanks for your answer. You know, I do not get an exception. The program records the voice from the specified input and stores in in the specified output. The problem is that the recorded voice is not clear, I don't know how to explain, it's something like the voice is edged. As I said before, it is something like 1-0-1-0... where in 1s there is voice and in 0s the voice is absent.
Thank you for your help again
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your problem is the memory administration.
//int halfBuffer = bufferSize / 2; no problem
int tenBuffer = bufferSize / 10; problem
i dont know as fix this but I would like to know
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Hei there! Thanks for your answer. No I don't think the prob is there. You know, at first the halfbuffer=buffersizes/2; but the recorded voice was something really awful, then I made it buffersize/10, it cleared the voice somehow, but not completely. But when I tried buffersize/100 it worsened the problem.
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Hi everyone
I'm developing an application which needs to use multiple threads. As the number of threads needed becomes known during runtime,
I have used an array of threads called "thrRec", all threads use the same method called "readBufferThr(int sh,int uu)"and pass different arguments to it.
My problem is that for example if I choose to run 5 threads, the first thread doesn't call the method properly. Next threads, have no problem, but the first one
wants to run the method in the end and passes wrong arguments to it. Here is my code:
Thread []thrRec=new Thread[chLBDev.CheckedItems.Count];
ThreadStart[] thrStrartRec = new ThreadStart[chLBDev.CheckedItems.Count];
int u=0;
foreach (int i in chLBDev.CheckedIndices)
{
thrStrartRec[u] = new ThreadStart(delegate { readBufferThr(i,u); });
thrRec[u] = new Thread(thrStrartRec[u]);
thrRec[u].Start();
u++;
}
readBufferThr(int sh,int uu)
{
//do something
}
Where's the problem?
Please help.
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Have you tried running in the debugger to check your values?
Bob
Ashfield Consultants Ltd
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Hei Ashfield, thanks for your answer, Yes I have tried the debugger to see whats going on in the application. In fact debugging the code, I've come to the point that it tries to run the delegate part of first iteration after all the other iterations have completed.
After completing all the iterations, it comes to the end line, increases "u" by one and then returns to the delegate line and tries to execute it with "u"s value equal to something wrong.
Thabks again for your help.
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Hi all,
I've two Datagridview controls. Each grid has different datasources.
Eg. Datasource of grid1 is Hastable.
Datasource of Grid1 is datatable.
i want to display all the columns in both gridcontrol in the same order.
Eg if Grid1 has columns in the order like Name,Age,DOB,SAL and i want the same order in grid2 also.
i'm trying to set displayindex. but it's not displaying in the same order.and also want to add Scrollbars if necessary.
Everything has to be done programatically. can anyone help me?
thanks in advance
sri
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So you want the event from 1 datagridview to be replicated on the other DG and the event is the sorting of the columns when the user clicks the column header. Do you start to see a pattern here.
Take a look at the events available for the DG, there are lots of them and many for the column header. Identify the one used by the DG for sorting and replicate the event on the other DG (you will need a flag to identify the source so you don't fall into an endless loop).
Never underestimate the power of human stupidity
RAH
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Hello,
(first im sorry for my english ist verry bad (
since 3 days i try to get the FileInfo like Author, Album, Tracknumber, Genre ect. of an audio file, but i faild.
i found an article shows exactly what i want but its in c++ http://www.codeproject.com/KB/audio-video/cmp3info.aspx[^]
Has anyone an idea how to get this informations?
thanks a lot
modified on Tuesday, September 30, 2008 1:30 PM
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You need c# version of id3 tag library. A simple search on Google or codeproject should bring helpful results.
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problem was to search somethink i dont know.
now i know that its called id3 tag
thank you verry much
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You are welcome. Hope you will be able to find interesting results.
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i need to use array. is there a way to do array in C# whereby it has a key and value like this =>
string[] strarray;
strarray["name"]="chris"
strarray["age"]="10"
strarray["gender"]="male"
or is there any method to do something like this?basically i wanna store into an array whereby the key correspond to the database field.
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sounds like you need a hash table.
Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall
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hash table looks rather complicated. is there a simple declaration and assigning of variable kinda thing?
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Use the Dictionary class.
regards
modified 12-Sep-18 21:01pm.
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hellow i want to use the LPT Port as an i2c bus
does some one have an example of code?
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Do you know why I do not get the list of printers on a particular Remote machine (win server 2003 SP2) using the following code?
No error is returned.
PrintServer myPrintServer = new PrintServer(@"\\" + txtServerName.Text.Trim());
// List the print server's queues
PrintQueueCollection myPrintQueues = myPrintServer.GetPrintQueues();
String printQueueNames = "My Print Queues:\n\n";
foreach (PrintQueue pq in myPrintQueues)
{
printQueueNames += "\t" + pq.Name + "\n";
}
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How do i append the character \ to a string
rtf = rtf + @"\"; this is not working now is this
rtf = rtf + "\\"; neither this
rtf = rtf + "\";
Thank you.
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Both of the first two work fine for me.
3rd one won't work because the \ sign is escaping the second " so you never actually close the quotes.
Simon
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Thank you
for me the first two lines are adding two // but i want only 1 and the last one is an escape char.
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Are the two \'s appearing in your output, or only in the debugger? The latter will of necessity show slashes used as escape characters when you look at a string. If it's the former, you need to provide a small program that reproduces this so we can see what you';re doing wrong.
Today's lesson is brought to you by the word "niggardly". Remember kids, don't attribute to racism what can be explained by Scandinavian language roots.
-- Robert Royall
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Its because you are viewing it in the debugger I suspect. If you just hover the mouse over it it shows \\, but if you look at it using the text visualiser it will be correct. Its caught me out before...
Bob
Ashfield Consultants Ltd
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